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Passage 2 Many scientists have wondered whether there is some quirk in the way depression is inherited, such as a depressed parent or grandparent is more likely to pass on a predisposition for the disorder to female than to male descendants. Based on studies that trace family histories of depression, the answer to that question appears to be no. (1)______ Simply tracing family histories, though, without considering environmental influences, might not offer a complete picture of how depression is inherited. Indeed, Kenneth S. Kendler and his colleagues at the Medical College of Virginia found in a study of 2060 female twins that genetics might contribute to how women respond to environmental pressures. The researchers examined twins with and without a family history of depression; some twins in both groups had recently undergone a trauma, such as the death of a loved one or a divorce. The investigators found that among the women who did not have a family history of depression, stressful events raised their risk for depression by only 6 percent. (2)______. A similar study has not been done in men, leaving open the question of whether environmental stress and genetic risk for depression interact similarly in both sexes. But research is being done, to determine whether men and women generally experience similar amounts and types of stress. Studies of key hormones hint that they do not. Hormones are not new to depression researchers. Many have wondered whether the gonadal steroids estrogen and progesterone--whose cyclic fluctuations in women regulate menstruation--might put women at a greater risk for depression. There are at least two ways in which they might do so. First, because of differences between theX and Y chromosomes, male and female brains are exposed to different hormonal milieus. (3)______. Indeed, animal experiments show that early hormonal influences have marked behavioral consequences later on, although the phenomenon is of course difficult to study in humans. Second, the fact that postpuberal men and women have different levels of circulating gonad steroids might somehow pull women at higher risk for depression. Research shows girls become more susceptible to depression than boys only after puberty, when they begin menstruating and experience hormonal fluxes. (4)______. For example, Peter J. Schmidt and David R. Rubinow of the National Institute of Mental Health recently reported that manipulations of estrogen and progesterone did not affect mood, except in women who suffer from severe premenstrual mood changes. It now appears, however, that estrogen might set the stage for depression indirectly by priming the body's stress response. During stressful times, the adrenal glands--which sit on top of the kidneys and are controlled by the pituitary gland in the brain--secrete higher levels of a hormone called cortical, which increases the activity of the body's metabolic and immune systems, among others: (5)______. Evidence is emerging that estrogen might not only increase cortical secretion but also decrease mortise’s ability to shut down its own secretion. The result might be a stress response that is not only more pronounced but also longer-lasting in women than in men.[A] But the same risk rose almost 14 percent among the women who did have a family history of depression. In other words, these women had seemingly inherited the propensity to become depressed in the wake of crises.[B] To figure out why depression is more common among women, scientists have to study how genetics and environment divide the sexes and how the two conspire to produce the symptoms we describe as depression.[C] In the normal course of events, stress increases cortical secretion, but these elevated levels have a negative feedback effect on the pituitary, so that cortical levels gradually return to normal;[D] Despite their importance, estrogen and cortical are not the only hormones involved in female depression, medium stress is not the only environmental influence that might hold more sway over women than men.[E] These hormonal differences may affect brain development so that men and women have different vulnerabilities and different physiological reactions to environmental stresses later in life.[F] Even so, scientists have never been able to establish a direct relation between emotional states and levels of estrogen and progesterone in the blood of women.[G] Women and men with similar heritage seem equally likely to develop disorder.
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更多 “问答题Passage 2 Many scientists have wondered whether there is some quirk in the way depression is inherited, such as a depressed parent or grandparent is more likely to pass on a predisposition for the disorder to female than to male descendants. Based on studies that trace family histories of depression, the answer to that question appears to be no. (1)______ Simply tracing family histories, though, without considering environmental influences, might not offer a complete picture of how depression is inherited. Indeed, Kenneth S. Kendler and his colleagues at the Medical College of Virginia found in a study of 2060 female twins that genetics might contribute to how women respond to environmental pressures. The researchers examined twins with and without a family history of depression; some twins in both groups had recently undergone a trauma, such as the death of a loved one or a divorce. The investigators found that among the women who did not have a family history of depression, stressful events raised their risk for depression by only 6 percent. (2)______. A similar study has not been done in men, leaving open the question of whether environmental stress and genetic risk for depression interact similarly in both sexes. But research is being done, to determine whether men and women generally experience similar amounts and types of stress. Studies of key hormones hint that they do not. Hormones are not new to depression researchers. Many have wondered whether the gonadal steroids estrogen and progesterone--whose cyclic fluctuations in women regulate menstruation--might put women at a greater risk for depression. There are at least two ways in which they might do so. First, because of differences between theX and Y chromosomes, male and female brains are exposed to different hormonal milieus. (3)______. Indeed, animal experiments show that early hormonal influences have marked behavioral consequences later on, although the phenomenon is of course difficult to study in humans. Second, the fact that postpuberal men and women have different levels of circulating gonad steroids might somehow pull women at higher risk for depression. Research shows girls become more susceptible to depression than boys only after puberty, when they begin menstruating and experience hormonal fluxes. (4)______. For example, Peter J. Schmidt and David R. Rubinow of the National Institute of Mental Health recently reported that manipulations of estrogen and progesterone did not affect mood, except in women who suffer from severe premenstrual mood changes. It now appears, however, that estrogen might set the stage for depression indirectly by priming the body's stress response. During stressful times, the adrenal glands--which sit on top of the kidneys and are controlled by the pituitary gland in the brain--secrete higher levels of a hormone called cortical, which increases the activity of the body's metabolic and immune systems, among others: (5)______. Evidence is emerging that estrogen might not only increase cortical secretion but also decrease mortise’s ability to shut down its own secretion. The result might be a stress response that is not only more pronounced but also longer-lasting in women than in men.[A] But the same risk rose almost 14 percent among the women who did have a family history of depression. In other words, these women had seemingly inherited the propensity to become depressed in the wake of crises.[B] To figure out why depression is more common among women, scientists have to study how genetics and environment divide the sexes and how the two conspire to produce the symptoms we describe as depression.[C] In the normal course of events, stress increases cortical secretion, but these elevated levels have a negative feedback effect on the pituitary, so that cortical levels gradually return to normal;[D] Despite their importance, estrogen and cortical are not the only hormones involved in female depression, medium stress is not the only environmental influence that might hold more sway over women than men.[E] These hormonal differences may affect brain development so that men and women have different vulnerabilities and different physiological reactions to environmental stresses later in life.[F] Even so, scientists have never been able to establish a direct relation between emotional states and levels of estrogen and progesterone in the blood of women.[G] Women and men with similar heritage seem equally likely to develop disorder.” 相关考题
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Which description of sleep disorder is wrong? ()
A、primarily behaviorally-based illnessB、draws more and more attention of parentsC、is more frequently than ADHDD、needs frequent screening
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Statistics indicate that depressed patients are more likely to become ill than ______ people are.A、regularB、normalC、naturalD、average
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As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia.Experts on dyslexia say that the problem is not a disease.They say that persons with dyslexia use information in a different way.One of the world's great thinkers and scientists,Albert Einstein was dyslexic.Einstein said that he never thought in words the way that most people do.He said that he thought in pictures instead.The American inventor Thomas Edison was also dyslexic.Dyslexia first was recognized in Europe and the United States more than 80 years ago.Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.The doctors found that the brains of persons with dyslexia are different.In most people,the left side of the brain一 the part that controls language is larger than the right side.In persons with dyslexia,the right side of the brain is bigger. Doctors are not sure what causes this difference.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left handed.No one knows the cause of dyslexia,but some scientists believe that it may result from chemical changes in a baby's body long before it is born.They are trying to find ways to teach persons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help.After they have solved their problems with language,they often show themselves to be especially intelligent or creative.One out of five American children suffers from dyslexia.A:Right B:Wrong C:Not mentioned
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As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia.Experts on dyslexia say that the problem is not a disease.They say that persons with dyslexia use information in a different way.One of the world's great thinkers and scientists,Albert Einstein was dyslexic.Einstein said that he never thought in words the way that most people do.He said that he thought in pictures instead.The American inventor Thomas Edison was also dyslexic.Dyslexia first was recognized in Europe and the United States more than 80 years ago.Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.The doctors found that the brains of persons with dyslexia are different.In most people,the left side of the brain一 the part that controls language is larger than the right side.In persons with dyslexia,the right side of the brain is bigger. Doctors are not sure what causes this difference.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left handed.No one knows the cause of dyslexia,but some scientists believe that it may result from chemical changes in a baby's body long before it is born.They are trying to find ways to teach persons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help.After they have solved their problems with language,they often show themselves to be especially intelligent or creative.Generally speaking,dyslexia is more common in left-handed males than in right-handed females.A:Right B:Wrong C:Not mentioned
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As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia.Experts on dyslexia say that the problem is not a disease.They say that persons with dyslexia use information in a different way.One of the world's great thinkers and scientists,Albert Einstein was dyslexic.Einstein said that he never thought in words the way that most people do.He said that he thought in pictures instead.The American inventor Thomas Edison was also dyslexic.Dyslexia first was recognized in Europe and the United States more than 80 years ago.Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.The doctors found that the brains of persons with dyslexia are different.In most people,the left side of the brain一 the part that controls language is larger than the right side.In persons with dyslexia,the right side of the brain is bigger. Doctors are not sure what causes this difference.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left handed.No one knows the cause of dyslexia,but some scientists believe that it may result from chemical changes in a baby's body long before it is born.They are trying to find ways to teach persons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help.After they have solved their problems with language,they often show themselves to be especially intelligent or creative.The first cases of dyslexia in Europe were discovered less than a century ago.A:Right B:Wrong C:Not mentioned
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As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia.Experts on dyslexia say that the problem is not a disease.They say that persons with dyslexia use information in a different way.One of the world's great thinkers and scientists,Albert Einstein was dyslexic.Einstein said that he never thought in words the way that most people do.He said that he thought in pictures instead.The American inventor Thomas Edison was also dyslexic.Dyslexia first was recognized in Europe and the United States more than 80 years ago.Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.The doctors found that the brains of persons with dyslexia are different.In most people,the left side of the brain一 the part that controls language is larger than the right side.In persons with dyslexia,the right side of the brain is bigger. Doctors are not sure what causes this difference.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left handed.No one knows the cause of dyslexia,but some scientists believe that it may result from chemical changes in a baby's body long before it is born.They are trying to find ways to teach persons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help.After they have solved their problems with language,they often show themselves to be especially intelligent or creative.Dyslexic people often turn out to be intelligent or creative once they have learned to handle lan-guage properly.A:Right B:Wrong C:Not mentioned
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As many as 20% of all children in the United States suffer from some form of the learning disorder called dyslexia.Experts on dyslexia say that the problem is not a disease.They say that persons with dyslexia use information in a different way.One of the world's great thinkers and scientists,Albert Einstein was dyslexic.Einstein said that he never thought in words the way that most people do.He said that he thought in pictures instead.The American inventor Thomas Edison was also dyslexic.Dyslexia first was recognized in Europe and the United States more than 80 years ago.Many years passed before doctors discovered that persons with the disorder were not mentally slow or disabled.The doctors found that the brains of persons with dyslexia are different.In most people,the left side of the brain一 the part that controls language is larger than the right side.In persons with dyslexia,the right side of the brain is bigger. Doctors are not sure what causes this difference.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left handed.No one knows the cause of dyslexia,but some scientists believe that it may result from chemical changes in a baby's body long before it is born.They are trying to find ways to teach persons with dyslexia. Dyslexic persons think differently and need special kinds of teaching help.After they have solved their problems with language,they often show themselves to be especially intelligent or creative.Many great thinkers and scientists in the world are dyslexic.A:Right B: Wrong C:Not mentioned
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More families consist of one‐parent households or two working parents;（ ）,children are likely to have less supervision at home than was common in the traditional family structure.A.contrarily
B.consequently
C.similarly
D.simultaneously
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Families have also（ ）changes these years.More families consist of one‐parent households or two working parents;consequently,children are likely to have less supervision at home than was common in the traditional family structure.A.survived
B.noticed
C.undertaken
D.experienced
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Listening to BirdsongA male zebra finch chirps away to himself. Suddenly he notices a female bird nearby.He realizes he has an audience and immediately changes his song. Can the female tell the difference in his perfonnance?According to a new study,the female zebra finch knows.And she prefers the special trills he creates when he sings to her. A male zebra finch changes his song when singing to a female in ways that people can barely detect.But the female finch can tell the difference.Scientists had noticed slight variations in the songs of male zebra finches based on whether they were singing alone or whether there was a female(and potential mate)nearby.With an audience,the males sped up the pace of their songs and controlled the notes they used.For this study,researchers Sarah C .Woolley and Allison Doupe at the University of California,San Francisco decided to focus attention on the listening females,which have not been well studied in the past.In the study,Woolley and Doupe set up,a long cage with a sound speaker at each end.One broadcast the sound of a male zebra finch singing to himself,like someone singing in the shower.The other speaker broadcast a male performing for a female audience,as if he was giving a concert.Female birds were placed between the two speakers.Some of the birds had mates.Others didn't. The females shifted around a bit,and then most of them hopped over to sit beside just one speaker. All the birds that made a clear choice liked songs meant for a female audience,even if they'd never met the male.Mated females also had a chance to listen to two different performance songs,one from an unknown male,and one from their mate .They spent more time listening to the concert version of their mates' songs.This suggests that after a while,females learn to recognize-and prefer-the songs of their mates.Scientists then studied the brains of the females.They found certain areas of the brain perked up when the birds listened to the concert songs.These brain areas may be involved in recognizing and evaluating the songs,and storing the memories of them.This research deals with what's called directed communication,when the communicator,or sender,focuses the message for a specific audience.One example is the way moms speak to their babies. Mothers around the world use the same sort of high-pitched sing-song chatter,and the babies respond best to those sounds.Songbirds are one of the only other species known to learn their communication,in this case their songs. What is NOT true of directed communication?A: The sender of a message has a specific audience.B: Male zebra finches sing to female finches.C: Mothers talk to their babies.D: Male zebra finches sing to themselves.
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Listening to BirdsongA male zebra finch chirps away to himself. Suddenly he notices a female bird nearby.He realizes he has an audience and immediately changes his song. Can the female tell the difference in his perfonnance?According to a new study,the female zebra finch knows.And she prefers the special trills he creates when he sings to her. A male zebra finch changes his song when singing to a female in ways that people can barely detect.But the female finch can tell the difference.Scientists had noticed slight variations in the songs of male zebra finches based on whether they were singing alone or whether there was a female(and potential mate)nearby.With an audience,the males sped up the pace of their songs and controlled the notes they used.For this study,researchers Sarah C .Woolley and Allison Doupe at the University of California,San Francisco decided to focus attention on the listening females,which have not been well studied in the past.In the study,Woolley and Doupe set up,a long cage with a sound speaker at each end.One broadcast the sound of a male zebra finch singing to himself,like someone singing in the shower.The other speaker broadcast a male performing for a female audience,as if he was giving a concert.Female birds were placed between the two speakers.Some of the birds had mates.Others didn't. The females shifted around a bit,and then most of them hopped over to sit beside just one speaker. All the birds that made a clear choice liked songs meant for a female audience,even if they'd never met the male.Mated females also had a chance to listen to two different performance songs,one from an unknown male,and one from their mate .They spent more time listening to the concert version of their mates' songs.This suggests that after a while,females learn to recognize-and prefer-the songs of their mates.Scientists then studied the brains of the females.They found certain areas of the brain perked up when the birds listened to the concert songs.These brain areas may be involved in recognizing and evaluating the songs,and storing the memories of them.This research deals with what's called directed communication,when the communicator,or sender,focuses the message for a specific audience.One example is the way moms speak to their babies. Mothers around the world use the same sort of high-pitched sing-song chatter,and the babies respond best to those sounds.Songbirds are one of the only other species known to learn their communication,in this case their songs. What does the first paragraph say about zebra finches?A: Male zebra finches like to sing to female zebra finches.B: Male zebra finches sing louder than female zebra finches.C: Male zebra finches change their songs in female zebra finches' presence.D: Male zebra finches like to listen to female zebra finches sing.
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Smoke Gets in Your Mind1.Lung cancer,hypertension,heart disease,birth defects一we are all too familiar with the dangers of smoking. But add to that list a frightening new concern一mental illness.According to some controversial new findings,if smoking does not kill you,it may,quite literally,drive you to despair.2.The tobacco industry openly pushes its product as something to lift your mood and soothe anxiety.But the short-term feel-good effect may mask the truth that smoking may worsen or even trigger anxiety disorders,panic attacks and depression,perhaps even schizophrenia.3.Cigarettes and mental illness have always tended to go together. An estimated 1.25 billion people smoke worldwide.Yet people who are depressed or anxious are twice as likely to smoke,and up to 88 percent of those with psychotic disorders such as schizophrenia are smokers.A recent American survey concluded that around half of all cigarettes burn in the fingers of those with mental illness.4.But the big question is why?The usual story is that the illness comes first. Mentally ill people take up smoking,or smoke more,to alleviate some of their distress.Even when smoking seems to start before the illness,most doctors believe that early but invisible symptoms of the disorder spark the desire to light up.But perhaps something more sinister is going on.5.A growing number of researchers claim that smoking is the cause,not the consequence of clinical depression and several forms of anxiety."We know a lot about the effects of smoking on physical health,and now we are also starting to see the adverse effects in new research on mental illness,"says Naomi Breslau,director of research at the Henry Ford Health Care System in Detroit.6.Breslau was one of the first to consider this heretical possibility.The hint came from studies, published in 1998,which followed a group of just over 1.,000 young adults for a five-year period.The 13 percent who began the study with major depression were around three times more likely to progress from being light smokers to daily smokers during the course of the study,though there was no evidence that depression increased the tendency to take up smoking. But a history of daily smok-- ing before the study commenced roughly doubled the risk of developing major depression during the five-year period. Smoking,it seems,could pre-date illness.7.At first Breslau concluded that whatever prompts people to smoke might also make them depressed.But as the results of other much larger studies began to back the statistical link,she became more convinced than ever that what she was seeing were signs that smoking,perhaps the nicotine itself,could somehow affect the brain and cause depression.8.One of these larger studies was led by Goodman,a pediatrician.She followed the health of two groups of teenagers for a year. The first group of 8,704 adolescents were not depressed,and might or might not have been smokers,while the second group of 6,947 were highly depressed and had not been smokers in the past month.After a year her team found that although depressed teenagers were more likely to have become heavy smokers,previous experimentation with smoking was the strongest predictor of such behaviour,not the depression itself. What is more important is that teenagers who started out mentally fit but smoked at least one packet per week during the study were four times more likely to develop depression than their non一smoking peers.Goodman says that depression does not seem to start before cigarette use among teens."Current cigarette use is,however,a powerful determinant of developing high depressive symptoms."9.Breslau,too,finds that smokers are as much as four times more likely to have an isolated panic attack and three times more likely to develop longer-term panic disorder than non-smokers.It's a hard message to get across,because many smokers say they become anxious when they quit,not when they smoke.But Breslau says thatBreslau's study________than Goodman's but lasted longer.A:have been proved to be misleadingB:but to their mental health as wellC:taking up smokingD:involved fewer peopleE:they started to smoke at an early ageF: but their level of anxiety increases when they quit smoking
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Smoke Gets in Your Mind1.Lung cancer,hypertension,heart disease,birth defects一we are all too familiar with the dangers of smoking. But add to that list a frightening new concern一mental illness.According to some controversial new findings,if smoking does not kill you,it may,quite literally,drive you to despair.2.The tobacco industry openly pushes its product as something to lift your mood and soothe anxiety.But the short-term feel-good effect may mask the truth that smoking may worsen or even trigger anxiety disorders,panic attacks and depression,perhaps even schizophrenia.3.Cigarettes and mental illness have always tended to go together. An estimated 1.25 billion people smoke worldwide.Yet people who are depressed or anxious are twice as likely to smoke,and up to 88 percent of those with psychotic disorders such as schizophrenia are smokers.A recent American survey concluded that around half of all cigarettes burn in the fingers of those with mental illness.4.But the big question is why?The usual story is that the illness comes first. Mentally ill people take up smoking,or smoke more,to alleviate some of their distress.Even when smoking seems to start before the illness,most doctors believe that early but invisible symptoms of the disorder spark the desire to light up.But perhaps something more sinister is going on.5.A growing number of researchers claim that smoking is the cause,not the consequence of clinical depression and several forms of anxiety."We know a lot about the effects of smoking on physical health,and now we are also starting to see the adverse effects in new research on mental illness,"says Naomi Breslau,director of research at the Henry Ford Health Care System in Detroit.6.Breslau was one of the first to consider this heretical possibility.The hint came from studies, published in 1998,which followed a group of just over 1.,000 young adults for a five-year period.The 13 percent who began the study with major depression were around three times more likely to progress from being light smokers to daily smokers during the course of the study,though there was no evidence that depression increased the tendency to take up smoking. But a history of daily smok-- ing before the study commenced roughly doubled the risk of developing major depression during the five-year period. Smoking,it seems,could pre-date illness.7.At first Breslau concluded that whatever prompts people to smoke might also make them depressed.But as the results of other much larger studies began to back the statistical link,she became more convinced than ever that what she was seeing were signs that smoking,perhaps the nicotine itself,could somehow affect the brain and cause depression.8.One of these larger studies was led by Goodman,a pediatrician.She followed the health of two groups of teenagers for a year. The first group of 8,704 adolescents were not depressed,and might or might not have been smokers,while the second group of 6,947 were highly depressed and had not been smokers in the past month.After a year her team found that although depressed teenagers were more likely to have become heavy smokers,previous experimentation with smoking was the strongest predictor of such behaviour,not the depression itself. What is more important is that teenagers who started out mentally fit but smoked at least one packet per week during the study were four times more likely to develop depression than their non一smoking peers.Goodman says that depression does not seem to start before cigarette use among teens."Current cigarette use is,however,a powerful determinant of developing high depressive symptoms."9.Breslau,too,finds that smokers are as much as four times more likely to have an isolated panic attack and three times more likely to develop longer-term panic disorder than non-smokers.It's a hard message to get across,because many smokers say they become anxious when they quit,not when they smoke.But Breslau says thatThe cigarette ads which claim that smoking can help soothe anxiety_______.A:have been proved to be misleadingB:but to their mental health as wellC:taking up smokingD:involved fewer peopleE:they started to smoke at an early ageF: but their level of anxiety increases when they quit smoking
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Smoke Gets in Your Mind1.Lung cancer,hypertension,heart disease,birth defects一we are all too familiar with the dangers of smoking. But add to that list a frightening new concern一mental illness.According to some controversial new findings,if smoking does not kill you,it may,quite literally,drive you to despair.2.The tobacco industry openly pushes its product as something to lift your mood and soothe anxiety.But the short-term feel-good effect may mask the truth that smoking may worsen or even trigger anxiety disorders,panic attacks and depression,perhaps even schizophrenia.3.Cigarettes and mental illness have always tended to go together. An estimated 1.25 billion people smoke worldwide.Yet people who are depressed or anxious are twice as likely to smoke,and up to 88 percent of those with psychotic disorders such as schizophrenia are smokers.A recent American survey concluded that around half of all cigarettes burn in the fingers of those with mental illness.4.But the big question is why?The usual story is that the illness comes first. Mentally ill people take up smoking,or smoke more,to alleviate some of their distress.Even when smoking seems to start before the illness,most doctors believe that early but invisible symptoms of the disorder spark the desire to light up.But perhaps something more sinister is going on.5.A growing number of researchers claim that smoking is the cause,not the consequence of clinical depression and several forms of anxiety."We know a lot about the effects of smoking on physical health,and now we are also starting to see the adverse effects in new research on mental illness,"says Naomi Breslau,director of research at the Henry Ford Health Care System in Detroit.6.Breslau was one of the first to consider this heretical possibility.The hint came from studies, published in 1998,which followed a group of just over 1.,000 young adults for a five-year period.The 13 percent who began the study with major depression were around three times more likely to progress from being light smokers to daily smokers during the course of the study,though there was no evidence that depression increased the tendency to take up smoking. But a history of daily smok-- ing before the study commenced roughly doubled the risk of developing major depression during the five-year period. Smoking,it seems,could pre-date illness.7.At first Breslau concluded that whatever prompts people to smoke might also make them depressed.But as the results of other much larger studies began to back the statistical link,she became more convinced than ever that what she was seeing were signs that smoking,perhaps the nicotine itself,could somehow affect the brain and cause depression.8.One of these larger studies was led by Goodman,a pediatrician.She followed the health of two groups of teenagers for a year. The first group of 8,704 adolescents were not depressed,and might or might not have been smokers,while the second group of 6,947 were highly depressed and had not been smokers in the past month.After a year her team found that although depressed teenagers were more likely to have become heavy smokers,previous experimentation with smoking was the strongest predictor of such behaviour,not the depression itself. What is more important is that teenagers who started out mentally fit but smoked at least one packet per week during the study were four times more likely to develop depression than their non一smoking peers.Goodman says that depression does not seem to start before cigarette use among teens."Current cigarette use is,however,a powerful determinant of developing high depressive symptoms."9.Breslau,too,finds that smokers are as much as four times more likely to have an isolated panic attack and three times more likely to develop longer-term panic disorder than non-smokers.It's a hard message to get across,because many smokers say they become anxious when they quit,not when they smoke.But Breslau says thatParagraph 6_______A:Doubt about the Usual Belief.B:Researchers' Opinion Divided.C:Positive Effects of Smoking as Advertised.D:Close Association Between Depression and Smoking.E:Breslau's Conclusion Supported by Another Larger Study.F:Effect of Smoking on Mental Health Initially Proved.
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Listening to BirdsongA male zebra finch chirps away to himself. Suddenly he notices a female bird nearby.He realizes he has an audience and immediately changes his song. Can the female tell the difference in his perfonnance?According to a new study,the female zebra finch knows.And she prefers the special trills he creates when he sings to her. A male zebra finch changes his song when singing to a female in ways that people can barely detect.But the female finch can tell the difference.Scientists had noticed slight variations in the songs of male zebra finches based on whether they were singing alone or whether there was a female(and potential mate)nearby.With an audience,the males sped up the pace of their songs and controlled the notes they used.For this study,researchers Sarah C .Woolley and Allison Doupe at the University of California,San Francisco decided to focus attention on the listening females,which have not been well studied in the past.In the study,Woolley and Doupe set up,a long cage with a sound speaker at each end.One broadcast the sound of a male zebra finch singing to himself,like someone singing in the shower.The other speaker broadcast a male performing for a female audience,as if he was giving a concert.Female birds were placed between the two speakers.Some of the birds had mates.Others didn't. The females shifted around a bit,and then most of them hopped over to sit beside just one speaker. All the birds that made a clear choice liked songs meant for a female audience,even if they'd never met the male.Mated females also had a chance to listen to two different performance songs,one from an unknown male,and one from their mate .They spent more time listening to the concert version of their mates' songs.This suggests that after a while,females learn to recognize-and prefer-the songs of their mates.Scientists then studied the brains of the females.They found certain areas of the brain perked up when the birds listened to the concert songs.These brain areas may be involved in recognizing and evaluating the songs,and storing the memories of them.This research deals with what's called directed communication,when the communicator,or sender,focuses the message for a specific audience.One example is the way moms speak to their babies. Mothers around the world use the same sort of high-pitched sing-song chatter,and the babies respond best to those sounds.Songbirds are one of the only other species known to learn their communication,in this case their songs. Which of the following can best reflect the theme of the passage?A: Chirping away.B: Birdsongs as communication.C: Zebra finches and their life.D: Enjoying birdsongs.
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Smoke Gets in Your Mind1.Lung cancer,hypertension,heart disease,birth defects一we are all too familiar with the dangers of smoking. But add to that list a frightening new concern一mental illness.According to some controversial new findings,if smoking does not kill you,it may,quite literally,drive you to despair.2.The tobacco industry openly pushes its product as something to lift your mood and soothe anxiety.But the short-term feel-good effect may mask the truth that smoking may worsen or even trigger anxiety disorders,panic attacks and depression,perhaps even schizophrenia.3.Cigarettes and mental illness have always tended to go together. An estimated 1.25 billion people smoke worldwide.Yet people who are depressed or anxious are twice as likely to smoke,and up to 88 percent of those with psychotic disorders such as schizophrenia are smokers.A recent American survey concluded that around half of all cigarettes burn in the fingers of those with mental illness.4.But the big question is why?The usual story is that the illness comes first. Mentally ill people take up smoking,or smoke more,to alleviate some of their distress.Even when smoking seems to start before the illness,most doctors believe that early but invisible symptoms of the disorder spark the desire to light up.But perhaps something more sinister is going on.5.A growing number of researchers claim that smoking is the cause,not the consequence of clinical depression and several forms of anxiety."We know a lot about the effects of smoking on physical health,and now we are also starting to see the adverse effects in new research on mental illness,"says Naomi Breslau,director of research at the Henry Ford Health Care System in Detroit.6.Breslau was one of the first to consider this heretical possibility.The hint came from studies, published in 1998,which followed a group of just over 1.,000 young adults for a five-year period.The 13 percent who began the study with major depression were around three times more likely to progress from being light smokers to daily smokers during the course of the study,though there was no evidence that depression increased the tendency to take up smoking. But a history of daily smok-- ing before the study commenced roughly doubled the risk of developing major depression during the five-year period. Smoking,it seems,could pre-date illness.7.At first Breslau concluded that whatever prompts people to smoke might also make them depressed.But as the results of other much larger studies began to back the statistical link,she became more convinced than ever that what she was seeing were signs that smoking,perhaps the nicotine itself,could somehow affect the brain and cause depression.8.One of these larger studies was led by Goodman,a pediatrician.She followed the health of two groups of teenagers for a year. The first group of 8,704 adolescents were not depressed,and might or might not have been smokers,while the second group of 6,947 were highly depressed and had not been smokers in the past month.After a year her team found that although depressed teenagers were more likely to have become heavy smokers,previous experimentation with smoking was the strongest predictor of such behaviour,not the depression itself. What is more important is that teenagers who started out mentally fit but smoked at least one packet per week during the study were four times more likely to develop depression than their non一smoking peers.Goodman says that depression does not seem to start before cigarette use among teens."Current cigarette use is,however,a powerful determinant of developing high depressive symptoms."9.Breslau,too,finds that smokers are as much as four times more likely to have an isolated panic attack and three times more likely to develop longer-term panic disorder than non-smokers.It's a hard message to get across,because many smokers say they become anxious when they quit,not when they smoke.But Breslau says thatNowadays many doFtors have become aware that smoking is not only a hazard to people's physical health_______.A:have been proved to be misleadingB:but to their mental health as wellC:taking up smokingD:involved fewer peopleE:they started to smoke at an early ageF: but their level of anxiety increases when they quit smoking
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Smoke Gets in Your Mind1.Lung cancer,hypertension,heart disease,birth defects一we are all too familiar with the dangers of smoking. But add to that list a frightening new concern一mental illness.According to some controversial new findings,if smoking does not kill you,it may,quite literally,drive you to despair.2.The tobacco industry openly pushes its product as something to lift your mood and soothe anxiety.But the short-term feel-good effect may mask the truth that smoking may worsen or even trigger anxiety disorders,panic attacks and depression,perhaps even schizophrenia.3.Cigarettes and mental illness have always tended to go together. An estimated 1.25 billion people smoke worldwide.Yet people who are depressed or anxious are twice as likely to smoke,and up to 88 percent of those with psychotic disorders such as schizophrenia are smokers.A recent American survey concluded that around half of all cigarettes burn in the fingers of those with mental illness.4.But the big question is why?The usual story is that the illness comes first. Mentally ill people take up smoking,or smoke more,to alleviate some of their distress.Even when smoking seems to start before the illness,most doctors believe that early but invisible symptoms of the disorder spark the desire to light up.But perhaps something more sinister is going on.5.A growing number of researchers claim that smoking is the cause,not the consequence of clinical depression and several forms of anxiety."We know a lot about the effects of smoking on physical health,and now we are also starting to see the adverse effects in new research on mental illness,"says Naomi Breslau,director of research at the Henry Ford Health Care System in Detroit.6.Breslau was one of the first to consider this heretical possibility.The hint came from studies, published in 1998,which followed a group of just over 1.,000 young adults for a five-year period.The 13 percent who began the study with major depression were around three times more likely to progress from being light smokers to daily smokers during the course of the study,though there was no evidence that depression increased the tendency to take up smoking. But a history of daily smok-- ing before the study commenced roughly doubled the risk of developing major depression during the five-year period. Smoking,it seems,could pre-date illness.7.At first Breslau concluded that whatever prompts people to smoke might also make them depressed.But as the results of other much larger studies began to back the statistical link,she became more convinced than ever that what she was seeing were signs that smoking,perhaps the nicotine itself,could somehow affect the brain and cause depression.8.One of these larger studies was led by Goodman,a pediatrician.She followed the health of two groups of teenagers for a year. The first group of 8,704 adolescents were not depressed,and might or might not have been smokers,while the second group of 6,947 were highly depressed and had not been smokers in the past month.After a year her team found that although depressed teenagers were more likely to have become heavy smokers,previous experimentation with smoking was the strongest predictor of such behaviour,not the depression itself. What is more important is that teenagers who started out mentally fit but smoked at least one packet per week during the study were four times more likely to develop depression than their non一smoking peers.Goodman says that depression does not seem to start before cigarette use among teens."Current cigarette use is,however,a powerful determinant of developing high depressive symptoms."9.Breslau,too,finds that smokers are as much as four times more likely to have an isolated panic attack and three times more likely to develop longer-term panic disorder than non-smokers.It's a hard message to get across,because many smokers say they become anxious when they quit,not when they smoke.But Breslau says thatTo contradict Breslau's conclusion,many smokers say that they are less anxious when they smoke________.A:have been proved to be misleadingB:but to their mental health as wellC:taking up smokingD:involved fewer peopleE:they started to smoke at an early ageF: but their level of anxiety increases when they quit smoking
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Listening to BirdsongA male zebra finch chirps away to himself. Suddenly he notices a female bird nearby.He realizes he has an audience and immediately changes his song. Can the female tell the difference in his perfonnance?According to a new study,the female zebra finch knows.And she prefers the special trills he creates when he sings to her. A male zebra finch changes his song when singing to a female in ways that people can barely detect.But the female finch can tell the difference.Scientists had noticed slight variations in the songs of male zebra finches based on whether they were singing alone or whether there was a female(and potential mate)nearby.With an audience,the males sped up the pace of their songs and controlled the notes they used.For this study,researchers Sarah C .Woolley and Allison Doupe at the University of California,San Francisco decided to focus attention on the listening females,which have not been well studied in the past.In the study,Woolley and Doupe set up,a long cage with a sound speaker at each end.One broadcast the sound of a male zebra finch singing to himself,like someone singing in the shower.The other speaker broadcast a male performing for a female audience,as if he was giving a concert.Female birds were placed between the two speakers.Some of the birds had mates.Others didn't. The females shifted around a bit,and then most of them hopped over to sit beside just one speaker. All the birds that made a clear choice liked songs meant for a female audience,even if they'd never met the male.Mated females also had a chance to listen to two different performance songs,one from an unknown male,and one from their mate .They spent more time listening to the concert version of their mates' songs.This suggests that after a while,females learn to recognize-and prefer-the songs of their mates.Scientists then studied the brains of the females.They found certain areas of the brain perked up when the birds listened to the concert songs.These brain areas may be involved in recognizing and evaluating the songs,and storing the memories of them.This research deals with what's called directed communication,when the communicator,or sender,focuses the message for a specific audience.One example is the way moms speak to their babies. Mothers around the world use the same sort of high-pitched sing-song chatter,and the babies respond best to those sounds.Songbirds are one of the only other species known to learn their communication,in this case their songs. What did the researchers find in their study of female zebra finches?A: Female finches liked songs male finches sang for them.B: Female finches only liked songs male finches sang for their mates.C: Female finches liked to listen to songs from both speakers.D: Female finches chose the best male singers as their mates.
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Listening to BirdsongA male zebra finch chirps away to himself. Suddenly he notices a female bird nearby.He realizes he has an audience and immediately changes his song. Can the female tell the difference in his perfonnance?According to a new study,the female zebra finch knows.And she prefers the special trills he creates when he sings to her. A male zebra finch changes his song when singing to a female in ways that people can barely detect.But the female finch can tell the difference.Scientists had noticed slight variations in the songs of male zebra finches based on whether they were singing alone or whether there was a female(and potential mate)nearby.With an audience,the males sped up the pace of their songs and controlled the notes they used.For this study,researchers Sarah C .Woolley and Allison Doupe at the University of California,San Francisco decided to focus attention on the listening females,which have not been well studied in the past.In the study,Woolley and Doupe set up,a long cage with a sound speaker at each end.One broadcast the sound of a male zebra finch singing to himself,like someone singing in the shower.The other speaker broadcast a male performing for a female audience,as if he was giving a concert.Female birds were placed between the two speakers.Some of the birds had mates.Others didn't. The females shifted around a bit,and then most of them hopped over to sit beside just one speaker. All the birds that made a clear choice liked songs meant for a female audience,even if they'd never met the male.Mated females also had a chance to listen to two different performance songs,one from an unknown male,and one from their mate .They spent more time listening to the concert version of their mates' songs.This suggests that after a while,females learn to recognize-and prefer-the songs of their mates.Scientists then studied the brains of the females.They found certain areas of the brain perked up when the birds listened to the concert songs.These brain areas may be involved in recognizing and evaluating the songs,and storing the memories of them.This research deals with what's called directed communication,when the communicator,or sender,focuses the message for a specific audience.One example is the way moms speak to their babies. Mothers around the world use the same sort of high-pitched sing-song chatter,and the babies respond best to those sounds.Songbirds are one of the only other species known to learn their communication,in this case their songs. What is meant by"concert songs"in the seventh paragraph?A: Songs sung by zebra finches at a concert.B: Songs sung by male finches for female finches.C: Songs sung by female finches for male finches.D: Songs sung by male finches to many female finches.
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Text 2 Far from joining the labour force,women have been falling away at an alarming pace.The female employment rate in India,counting both the formal and informal economy,has tumbled from an already-low 35%in 2005 to just 26%now.Yet nearly 1Om fewer women are in jobs.A rise in female employment rates to the male level would provide India with an extra 235m workers,more than the EU has of either gender,and more than enough to fill all the factories in the rest ofAsia.Imagine the repercussions.Were India to rebalance its workforce in this way,the IMF estimates,the world's biggest democracy would be 27%richer.Its people would be well on their way to middle-income status.Beyond the obvious economic benelits are the incalculable human ones.Women who work are likelier to invest more in their children's upbringing,and to have more say over how they lead their lives.Social mores are startlingly conservative.A girl's first task is to persuade her own family that she should have a job.The in-laws she will typically move in with after marriage are even more likely to yank her out of the workforce and into social isolation.In a survey in 2012,84%of Indians agreed that men have more right to work than women when jobs are scarce.Men have taken 90%of the 36m additional jobs in industry India has created since 2005.And those who say that women themselves prefer not to work must contend with plenty of counter-evidence.Census data suggest that a third of stay-at-home women would WOfk ifjobs were available;govemment make-work schemes attract more women than men.What can be done?Many of the standard answers fall short.Promoting education,a time-tested development strategy,may not succeed.Figures show that the more schooling an Indian woman receives,the less likely she is to work,at least if she has anything less than a university degree.Likewise urbanization,another familiar way to alleviate poverty:city-dwelling women are half as likely as rural ones to have a job.An optimist might argue that more women are not working because India is still paying for the sins of the past,when so many of them were illiterate and high fertility rates bound them to the home.Most measures of female welfare are improving.India has many more girls in classrooms and fewer child brides than it once did.In fact,many fear that all that extra schooling was a parental ploy to improve a daughter's prospects not in the labour market but in the arranged-marriage market,part of the all-important quest to snag a suitable boy.A further push is needed to get Indian women what they really need:a suitable job.
An optimist may hold that lead to the phenomenon that more women are not working_____A.crimes committed in the past
B.preferences for early marriage
C.illiteracy and parenting duty
D.pressures from the poor welfare
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Text 2 Far from joining the labour force,women have been falling away at an alarming pace.The female employment rate in India,counting both the formal and informal economy,has tumbled from an already-low 35%in 2005 to just 26%now.Yet nearly 1Om fewer women are in jobs.A rise in female employment rates to the male level would provide India with an extra 235m workers,more than the EU has of either gender,and more than enough to fill all the factories in the rest ofAsia.Imagine the repercussions.Were India to rebalance its workforce in this way,the IMF estimates,the world's biggest democracy would be 27%richer.Its people would be well on their way to middle-income status.Beyond the obvious economic benelits are the incalculable human ones.Women who work are likelier to invest more in their children's upbringing,and to have more say over how they lead their lives.Social mores are startlingly conservative.A girl's first task is to persuade her own family that she should have a job.The in-laws she will typically move in with after marriage are even more likely to yank her out of the workforce and into social isolation.In a survey in 2012,84%of Indians agreed that men have more right to work than women when jobs are scarce.Men have taken 90%of the 36m additional jobs in industry India has created since 2005.And those who say that women themselves prefer not to work must contend with plenty of counter-evidence.Census data suggest that a third of stay-at-home women would WOfk ifjobs were available;govemment make-work schemes attract more women than men.What can be done?Many of the standard answers fall short.Promoting education,a time-tested development strategy,may not succeed.Figures show that the more schooling an Indian woman receives,the less likely she is to work,at least if she has anything less than a university degree.Likewise urbanization,another familiar way to alleviate poverty:city-dwelling women are half as likely as rural ones to have a job.An optimist might argue that more women are not working because India is still paying for the sins of the past,when so many of them were illiterate and high fertility rates bound them to the home.Most measures of female welfare are improving.India has many more girls in classrooms and fewer child brides than it once did.In fact,many fear that all that extra schooling was a parental ploy to improve a daughter's prospects not in the labour market but in the arranged-marriage market,part of the all-important quest to snag a suitable boy.A further push is needed to get Indian women what they really need:a suitablejob.
Which ofthe following would be the best title ofthe text?A.Why Indian Women Don't Work
B.Why India Needs Women to Work
C.Why India's Employment Rate Is Low
D.Why India's Employment Rate Declines
考题
Text 2 Far from joining the labour force,women have been falling away at an alarming pace.The female employment rate in India,counting both the formal and informal economy,has tumbled from an already-low 35%in 2005 to just 26%now.Yet nearly 1Om fewer women are in jobs.A rise in female employment rates to the male level would provide India with an extra 235m workers,more than the EU has of either gender,and more than enough to fill all the factories in the rest ofAsia.Imagine the repercussions.Were India to rebalance its workforce in this way,the IMF estimates,the world's biggest democracy would be 27%richer.Its people would be well on their way to middle-income status.Beyond the obvious economic benelits are the incalculable human ones.Women who work are likelier to invest more in their children's upbringing,and to have more say over how they lead their lives.Social mores are startlingly conservative.A girl's first task is to persuade her own family that she should have a job.The in-laws she will typically move in with after marriage are even more likely to yank her out of the workforce and into social isolation.In a survey in 2012,84%of Indians agreed that men have more right to work than women when jobs are scarce.Men have taken 90%of the 36m additional jobs in industry India has created since 2005.And those who say that women themselves prefer not to work must contend with plenty of counter-evidence.Census data suggest that a third of stay-at-home women would WOfk ifjobs were available;govemment make-work schemes attract more women than men.What can be done?Many of the standard answers fall short.Promoting education,a time-tested development strategy,may not succeed.Figures show that the more schooling an Indian woman receives,the less likely she is to work,at least if she has anything less than a university degree.Likewise urbanization,another familiar way to alleviate poverty:city-dwelling women are half as likely as rural ones to have a job.An optimist might argue that more women are not working because India is still paying for the sins of the past,when so many of them were illiterate and high fertility rates bound them to the home.Most measures of female welfare are improving.India has many more girls in classrooms and fewer child brides than it once did.In fact,many fear that all that extra schooling was a parental ploy to improve a daughter's prospects not in the labour market but in the arranged-marriage market,part of the all-important quest to snag a suitable boy.A further push is needed to get Indian women what they really need:a suitable job.Better education may not function because_____A.higher educated women are reluctant to work
B.higher education is not equal to higher possibility of work
C.women living in rural are less likely to join work
D.higher education failed to stand the test oftime
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1.All research to date on body image shows that women are much more critical of their appearance than men and much less likely to admire what they see in the mirror. Up to 8 out of 10 women are dissatisfied with their reflection,and more than half may see a distorted image.2.Men looking in the mirror are more likely to be either pleased with what they see or indifferent. Research shows that men generally have a much more positive body-image than women一if anything,they may tend to over-estimate their attractiveness.Some men looking in the mirror may literally not see the flaws in their appearance.3.Why are women too much more self-critical than men?Because women are judged on their appearance more than men,and standards of female beauty are considerably higher and more inflexible.Women are continually bombarded with images of the inflexible.Women are continually bombarded with images of the"ideal"face.And constant exposure to idealized images of female beauty on TV,magazines and billboards makes exceptional good looks seem normal and anything short of perfection seem abnormal and ugly.It has been estimated that young women now see more images of outstandingly beautiful women in one day than our mothers saw throughout their entire adolescence.4.Also,most women are trying to achieve the impossible:standards of female beauty have in fact become progressively more unrealistic during the last century.In 1917,the physically perfect woman was about 5 feet 4 inches tall and weighed nearly 10 stone（约140磅）.Even 25 years ago, top models and beauty queens weighed only 8% less than the average woman,now they weigh 23% less.The current media ideal for women is achievable by less than 5% of the female population一and that's just in terms of weight and size.If you want the ideal shape,face,etc, it's probably more like 1%.Men generally have such a positive body-image that some men looking in the mirn may_______.A:literally not see the flaws in their appearance.B:1%C:smile at themselvesD:standards of female beauty are considerably higher and more inflexibleE:progressively more unrealisticF:5%
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问答题Passage 2 Many scientists have wondered whether there is some quirk in the way depression is inherited, such as a depressed parent or grandparent is more likely to pass on a predisposition for the disorder to female than to male descendants. Based on studies that trace family histories of depression, the answer to that question appears to be no. (1)______ Simply tracing family histories, though, without considering environmental influences, might not offer a complete picture of how depression is inherited. Indeed, Kenneth S. Kendler and his colleagues at the Medical College of Virginia found in a study of 2060 female twins that genetics might contribute to how women respond to environmental pressures. The researchers examined twins with and without a family history of depression; some twins in both groups had recently undergone a trauma, such as the death of a loved one or a divorce. The investigators found that among the women who did not have a family history of depression, stressful events raised their risk for depression by only 6 percent. (2)______. A similar study has not been done in men, leaving open the question of whether environmental stress and genetic risk for depression interact similarly in both sexes. But research is being done, to determine whether men and women generally experience similar amounts and types of stress. Studies of key hormones hint that they do not. Hormones are not new to depression researchers. Many have wondered whether the gonadal steroids estrogen and progesterone--whose cyclic fluctuations in women regulate menstruation--might put women at a greater risk for depression. There are at least two ways in which they might do so. First, because of differences between theX and Y chromosomes, male and female brains are exposed to different hormonal milieus. (3)______. Indeed, animal experiments show that early hormonal influences have marked behavioral consequences later on, although the phenomenon is of course difficult to study in humans. Second, the fact that postpuberal men and women have different levels of circulating gonad steroids might somehow pull women at higher risk for depression. Research shows girls become more susceptible to depression than boys only after puberty, when they begin menstruating and experience hormonal fluxes. (4)______. For example, Peter J. Schmidt and David R. Rubinow of the National Institute of Mental Health recently reported that manipulations of estrogen and progesterone did not affect mood, except in women who suffer from severe premenstrual mood changes. It now appears, however, that estrogen might set the stage for depression indirectly by priming the body's stress response. During stressful times, the adrenal glands--which sit on top of the kidneys and are controlled by the pituitary gland in the brain--secrete higher levels of a hormone called cortical, which increases the activity of the body's metabolic and immune systems, among others: (5)______. Evidence is emerging that estrogen might not only increase cortical secretion but also decrease mortise’s ability to shut down its own secretion. The result might be a stress response that is not only more pronounced but also longer-lasting in women than in men.[A] But the same risk rose almost 14 percent among the women who did have a family history of depression. In other words, these women had seemingly inherited the propensity to become depressed in the wake of crises.[B] To figure out why depression is more common among women, scientists have to study how genetics and environment divide the sexes and how the two conspire to produce the symptoms we describe as depression.[C] In the normal course of events, stress increases cortical secretion, but these elevated levels have a negative feedback effect on the pituitary, so that cortical levels gradually return to normal;[D] Despite their importance, estrogen and cortical are not the only hormones involved in female depression, medium stress is not the only environmental influence that might hold more sway over women than men.[E] These hormonal differences may affect brain development so that men and women have different vulnerabilities and different physiological reactions to environmental stresses later in life.[F] Even so, scientists have never been able to establish a direct relation between emotional states and levels of estrogen and progesterone in the blood of women.[G] Women and men with similar heritage seem equally likely to develop disorder.
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单选题How many more decades will have to pass ______ scientists succeed in providing a cure for cancer?A
whenB
beforeC
sinceD
until
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问答题Male students emit more heat than female students do, and the larger a student is, the more heat he produces.
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单选题According to the passage, people have difficulty getting to sleep because ______.A
they work more than sixty hours a weekB
they have too many enemiesC
they do not sleep happilyD
they are not tired enough
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单选题Some people believe,_____ headed by a female are twice as likely to be poor as one headed by a male.A
householdsB
homesteadsC
choresD
assignments
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