网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
共用题干
第三篇
Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.
But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.
Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."
第三篇
Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.
But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.
Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."
Americans are still gaining weight though reducing the fat intake because_________.
A:they eat regular cookies instead of nonfat ones
B:they eat too much
C:they eat too much sugar
D:they eat low-fat crackers,soups
A:they eat regular cookies instead of nonfat ones
B:they eat too much
C:they eat too much sugar
D:they eat low-fat crackers,soups
参考答案
参考解析
解析：主旨推断题。本文第一句就说：虽然美国人减少了脂肪摄入量，但是体重却没有停止增加。接下来就详细分析了为何如此：很多人认为自己选择了低脂或无脂肪食物就会放松警惕，放纵自己吃很多，而这些无脂肪食物中往往添加了很多东西来弥补脂肪的缺失，这样一来导致肥胖问题并没有减轻。因此本题选B。
本题是细节考查题。根据第一段第三句和第四句可知：每克脂肪含9卡路里热量，而protein and carbohydrates则含4卡路里热量，因此本题选C。 B选项“sugar”和D 选项“amino acids”为protein and carbohydrates分解后的产物。
本题是推断题。第二段倒数第二句中强调这个电脑程序员每天吃half a pound of jelly beans，这里从这一非常具体的数据half a pound中可以推断出他吃得太多了。因此选D。
本题是推断题。根据第三段中芭芭拉教授的实验，我们得知食用低脂酸奶的那一组体重增加反而高于食用高脂酸奶的那组，因为食用低脂酸奶的人认为自己摄入了较少的脂肪，因此在接下来的一天中就会吃很多别的东西，往往导致体重增加。根据第三段可知两组女性所吃的酸奶卡路里相同（that contained exactly the same amount of calories），并非哪个热量多哪个少，也并非说吃了同等数量的酸奶，因此选项B和C都不对。实验结果表明食用低脂酸奶的人反而体重增加，因此D选项不对。本题只能选A。
文中第一句话就说：即使减少脂肪摄入量，肥胖依然是美国人面临的一个问题，以及接下来所举的例子都说明了通过摄入低脂食物的方法未必能减肥，因此选项A和D 都不对。通过第一段第三和第四句可知：美国人认为有必要知道各种食物所含热量，由此来决定食用什么以及多少食物。因此可推断选项C是正确的。
本题是细节考查题。根据第一段第三句和第四句可知：每克脂肪含9卡路里热量，而protein and carbohydrates则含4卡路里热量，因此本题选C。 B选项“sugar”和D 选项“amino acids”为protein and carbohydrates分解后的产物。
本题是推断题。第二段倒数第二句中强调这个电脑程序员每天吃half a pound of jelly beans，这里从这一非常具体的数据half a pound中可以推断出他吃得太多了。因此选D。
本题是推断题。根据第三段中芭芭拉教授的实验，我们得知食用低脂酸奶的那一组体重增加反而高于食用高脂酸奶的那组，因为食用低脂酸奶的人认为自己摄入了较少的脂肪，因此在接下来的一天中就会吃很多别的东西，往往导致体重增加。根据第三段可知两组女性所吃的酸奶卡路里相同（that contained exactly the same amount of calories），并非哪个热量多哪个少，也并非说吃了同等数量的酸奶，因此选项B和C都不对。实验结果表明食用低脂酸奶的人反而体重增加，因此D选项不对。本题只能选A。
文中第一句话就说：即使减少脂肪摄入量，肥胖依然是美国人面临的一个问题，以及接下来所举的例子都说明了通过摄入低脂食物的方法未必能减肥，因此选项A和D 都不对。通过第一段第三和第四句可知：美国人认为有必要知道各种食物所含热量，由此来决定食用什么以及多少食物。因此可推断选项C是正确的。
更多 “共用题干 第三篇Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."Americans are still gaining weight though reducing the fat intake because_________.A:they eat regular cookies instead of nonfat onesB:they eat too muchC:they eat too much sugarD:they eat low-fat crackers,soups” 相关考题
考题
In the United States, 30 percent of the adult population has a "weight problem". To many people, the cause is obvious: we eat too much. But scientific evidence does little to support this idea. Going back to the America of 1910, we find that people were leaner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less, and didn't watch TV.Several modern studies, moreover, have shown that fatter people do not eat more on average than thinner people. In fact, some investigations, such as a 1979 study of 3, 545 London office workers, report that, on balance, fat people eat less than slimmer people.Studies show that slim people are more active than fat people. A study by a research group at Stanford University found the following interesting fact:The more the man ran, the greater loss of body fat.The more they ran, the greater their increase in food intake.Thus, those who ran the most ate the most, yet lost the greatest amount of body fat.1、What kind of physical problem do many adult Americans have?____A、They are too slim.B、They work too hard.C、They are too fat.D、 They lost too much body fat.2、Based upon the statistics given in the article, suppose there are 500 adult Americans, about how many of them will have a "weight problem"?____A、 30.B、 50.C、100.D、150.3、Is there scientific evidence to support that eating too much is the cause of a "weight problem"?____A、Yes, there is plenty of evidence.B、Of course, there is some evidence to show this is true.C、There is hardly any scientific evidence to support this.D、We don't know because the information is not given4、In comparison with the adult American population today, the Americans of ____.A、ate more food and had more physical activitiesB、ate less food but had more activitiesC、 ate less food and had less physical exerciseD、had more weight problems5、What have modern medical and scientific researches reported to us?____A、Fat people eat less food and are less active.B、 Fat people eat more food than slim people and are more active.C、 Fat people eat more food than slim people but are less active.D、 Thin people run less, but have greater increase in food intake.
考题
共用题干
Eat for a Good and Healthful LifeFood is essential to us as it_________(1)us alive.But recently,research has shown that the eating habits of the average Americans may be dangerous to future ________(2).The foods Americans now choose are often too________(3) in calories（卡路里） and fats. So this article reports a new study: Diet and Health, Implications（含意）for Reducing Chronic Disease Risk.The study,conducted_________(4)the National Research Council's Committee on Diet and Health,__________(5)that balancing nutrition（营养）,calories and activity is the_____(6)to enjoying a long and healthful life.The report recommends that most Americans increase_____(7)activity to a moderate level and make changes in food__________(8)and the amount of calories taken to maintain ideal weight.Most of us-even_________(9)of us at ideal weight-need to eat less fat so _________(10)no more than 30%of our daily calories will come from fat.That means cutting _______ ( 1 1 ) on red meat and whole milk dairy（乳制品） products.Indeed,eat fish,chicken without skin,meats containing little or no fat,and low-fat or no-fat dairy__________(12).The report of the Committee on Diet and Health recommends we eat five or more 1/2- cup servings（一份）of vegetables and fruits___________(13）一especially green and yellow vegetables and such fruits as oranges and lemons.Eating more fruits_________(14)vegetables doesn't have to mean taking increased amounts of calories.Many plant foods are rich in nutritional substances:they provide many vitamins and minerals for very few__________(15)._________(10) A:long B: much C: that D: as
考题
共用题干
Eat for a Good and Healthful LifeFood is essential to us as it_________(1)us alive.But recently,research has shown that the eating habits of the average Americans may be dangerous to future ________(2).The foods Americans now choose are often too________(3) in calories（卡路里） and fats. So this article reports a new study: Diet and Health, Implications（含意）for Reducing Chronic Disease Risk.The study,conducted_________(4)the National Research Council's Committee on Diet and Health,__________(5)that balancing nutrition（营养）,calories and activity is the_____(6)to enjoying a long and healthful life.The report recommends that most Americans increase_____(7)activity to a moderate level and make changes in food__________(8)and the amount of calories taken to maintain ideal weight.Most of us-even_________(9)of us at ideal weight-need to eat less fat so _________(10)no more than 30%of our daily calories will come from fat.That means cutting _______ ( 1 1 ) on red meat and whole milk dairy（乳制品） products.Indeed,eat fish,chicken without skin,meats containing little or no fat,and low-fat or no-fat dairy__________(12).The report of the Committee on Diet and Health recommends we eat five or more 1/2- cup servings（一份）of vegetables and fruits___________(13）一especially green and yellow vegetables and such fruits as oranges and lemons.Eating more fruits_________(14)vegetables doesn't have to mean taking increased amounts of calories.Many plant foods are rich in nutritional substances:they provide many vitamins and minerals for very few__________(15)._________(15) A:liquids B:sugars C: resources D: calories
考题
共用题干
第三篇A New Cause of SufferingA conference on obesity（肥胖症）was recently held in Vienna. Two thousand experts from more than fifty countries attended the conference.According to statistics,1.2 billion people worldwide are overweight,and 250 million are too fat.Obesity is rapidly becoming a new cause of suffering.Professor Friedrich Hopichler of Salzberg said:"We are living in the new age but with the metabolism（新陈代谢）of a stone-age man. I have just been to the United States. It is really terrible. A pizza（比萨饼）shop is appearing on every corner. We have been occuoied by fast food and Coca-Cola-ization."Many of the experts stressed that obesity was a potential killer.Hopicnier saia: "Eighty per cent of all diabetics（糖尿病人）are too fat,also fifty per cent of all patients with high blood pressure and fifty per cent with fatty（脂肪的）tissue complaints. Ten per cent more weight means thirteen per cent more risk of heart disease.Reducing one's weight by ten oer cent leads to thirteen per cent lower blood pressure."Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs,"The health insurance pays for surgery(such as reducing the size of the stomach ) when the body-mass index（身体质量指数）is more than 40.That is equivalent to a weight of 116 kilograms for a height of 1.60 meters.One should start earlier."Toplak said that prevention should begin in school.“Child obesity has a close relation with the time which children spend in front of TV sets." In Toplak's opinion,the more time a child spends watching TV,A:the better he will do in his studies.B:the more likely he will get too fat.C:the less likely he will get too fat.D:the more friends he will have at school.
考题
共用题干
第一篇ObesityObesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints.Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes,and it provides insulation and protection for internal organs.But too much fat in the body is associated with a variety of health problems.Most physicians use the body mass index(BMI)to determine desirable weights.BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.Weight-height tables,such as those published by the Metropolitan Life Insurance Company,are also used as general measures of desirable weight ranges.These tables assign a range of weights for a particular height.For example,a man of 1.8m has a desirable range of 66 to 83 kg,with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg,with an average of 62 kg.The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat,as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue,which weighs more than fat. Likewise,a person with a sedentary lifestyle may be within a desirable weight range but have excess fat tissue.Obesity increases the risk of developing disease.According to some estimates,almost 70 percent of heart disease cases are linked to excess body fat,and obese people are more than twice as likely to develop high blood pressure.Obese women are at nearly twice the risk for developing breast cancer,and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications particularly heart disease increases when body fat is distributed around the waist,especially in the abdomen.This type of upper body fat distribution is more common in men than in women.The social and psychological problems experienced by obese people are also formidable.Stereotypes about"fat"people are often translated into discriminatory practices in education,employment, and social relationships.The consequences of being obese in a world where people had better be "thin"are especially severe for women,whose appearances are often judged against and ideal of exaggerated slimness.If a woman is I.6m tall and weighs 49 kg,she__________.A:is considered within the desirable weight-height rangeB:is definitely unhealthyC:should be considered fatD:should not be considered unhealthy
考题
共用题干
第一篇ObesityObesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints.Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes,and it provides insulation and protection for internal organs.But too much fat in the body is associated with a variety of health problems.Most physicians use the body mass index(BMI)to determine desirable weights.BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.Weight-height tables,such as those published by the Metropolitan Life Insurance Company,are also used as general measures of desirable weight ranges.These tables assign a range of weights for a particular height.For example,a man of 1.8m has a desirable range of 66 to 83 kg,with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg,with an average of 62 kg.The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat,as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue,which weighs more than fat. Likewise,a person with a sedentary lifestyle may be within a desirable weight range but have excess fat tissue.Obesity increases the risk of developing disease.According to some estimates,almost 70 percent of heart disease cases are linked to excess body fat,and obese people are more than twice as likely to develop high blood pressure.Obese women are at nearly twice the risk for developing breast cancer,and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications particularly heart disease increases when body fat is distributed around the waist,especially in the abdomen.This type of upper body fat distribution is more common in men than in women.The social and psychological problems experienced by obese people are also formidable.Stereotypes about"fat"people are often translated into discriminatory practices in education,employment, and social relationships.The consequences of being obese in a world where people had better be "thin"are especially severe for women,whose appearances are often judged against and ideal of exaggerated slimness.What is obesity?A:Obesity is having fat tissue under the skin.B:Obesity is having fat tissue around organs.C:Obesity is being too fat.D:Obesity is having good health.
考题
共用题干
第一篇ObesityObesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints.Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes,and it provides insulation and protection for internal organs.But too much fat in the body is associated with a variety of health problems.Most physicians use the body mass index(BMI)to determine desirable weights.BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.Weight-height tables,such as those published by the Metropolitan Life Insurance Company,are also used as general measures of desirable weight ranges.These tables assign a range of weights for a particular height.For example,a man of 1.8m has a desirable range of 66 to 83 kg,with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg,with an average of 62 kg.The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat,as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue,which weighs more than fat. Likewise,a person with a sedentary lifestyle may be within a desirable weight range but have excess fat tissue.Obesity increases the risk of developing disease.According to some estimates,almost 70 percent of heart disease cases are linked to excess body fat,and obese people are more than twice as likely to develop high blood pressure.Obese women are at nearly twice the risk for developing breast cancer,and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications particularly heart disease increases when body fat is distributed around the waist,especially in the abdomen.This type of upper body fat distribution is more common in men than in women.The social and psychological problems experienced by obese people are also formidable.Stereotypes about"fat"people are often translated into discriminatory practices in education,employment, and social relationships.The consequences of being obese in a world where people had better be "thin"are especially severe for women,whose appearances are often judged against and ideal of exaggerated slimness.If we say that"fat is critical for good health,"we mean that_________.A:fat people should be criticizedB:fat is very important for people to keep healthyC:people should be fat if they want to be healthyD:having much fat in the body is certainly associated with health problems
考题
共用题干
第一篇ObesityObesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints.Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes,and it provides insulation and protection for internal organs.But too much fat in the body is associated with a variety of health problems.Most physicians use the body mass index(BMI)to determine desirable weights.BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.Weight-height tables,such as those published by the Metropolitan Life Insurance Company,are also used as general measures of desirable weight ranges.These tables assign a range of weights for a particular height.For example,a man of 1.8m has a desirable range of 66 to 83 kg,with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg,with an average of 62 kg.The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat,as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue,which weighs more than fat. Likewise,a person with a sedentary lifestyle may be within a desirable weight range but have excess fat tissue.Obesity increases the risk of developing disease.According to some estimates,almost 70 percent of heart disease cases are linked to excess body fat,and obese people are more than twice as likely to develop high blood pressure.Obese women are at nearly twice the risk for developing breast cancer,and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications particularly heart disease increases when body fat is distributed around the waist,especially in the abdomen.This type of upper body fat distribution is more common in men than in women.The social and psychological problems experienced by obese people are also formidable.Stereotypes about"fat"people are often translated into discriminatory practices in education,employment, and social relationships.The consequences of being obese in a world where people had better be "thin"are especially severe for women,whose appearances are often judged against and ideal of exaggerated slimness.According to this article,fat people may be_________.A:looked down upon by othersB:welcomed by othersC:considered severely illD:thought of having special problems
考题
共用题干
第一篇ObesityObesity refers to the medical condition characterized by storage of excess body fat. The human body naturally stores fat tissue under the skin and around organs and joints.Fat is critical for good health because it is a source of energy when the body lacks the energy necessary to sustain life processes,and it provides insulation and protection for internal organs.But too much fat in the body is associated with a variety of health problems.Most physicians use the body mass index(BMI)to determine desirable weights.BMI is calculated as weight divided by height and people with a BMI of 27 or above are considered obese.Weight-height tables,such as those published by the Metropolitan Life Insurance Company,are also used as general measures of desirable weight ranges.These tables assign a range of weights for a particular height.For example,a man of 1.8m has a desirable range of 66 to 83 kg,with an average of 75 kg. A woman who is 1.6 m has a desirable range between 53 and 70 kg,with an average of 62 kg.The BMI and weight-height tables only provide rough estimates of desirable weights and scientists recognize that many other factors besides height affect weight. Weight alone may not be an indicator of fat,as in the case of a body-builder who may have a high BMI because of a high percentage of muscle tissue,which weighs more than fat. Likewise,a person with a sedentary lifestyle may be within a desirable weight range but have excess fat tissue.Obesity increases the risk of developing disease.According to some estimates,almost 70 percent of heart disease cases are linked to excess body fat,and obese people are more than twice as likely to develop high blood pressure.Obese women are at nearly twice the risk for developing breast cancer,and all obese people have an estimated 42 percent higher chance of developing colon cancer. The risk of medical complications particularly heart disease increases when body fat is distributed around the waist,especially in the abdomen.This type of upper body fat distribution is more common in men than in women.The social and psychological problems experienced by obese people are also formidable.Stereotypes about"fat"people are often translated into discriminatory practices in education,employment, and social relationships.The consequences of being obese in a world where people had better be "thin"are especially severe for women,whose appearances are often judged against and ideal of exaggerated slimness.A heavy man ________.A:certainly has a lot of fat in himB:usually has a sedentary lifestyleC:certainly has a lot muscle in himD:may have muscle tissue that weighs more than fat
考题
Passage Three
Americans are well known for the strange diets they always seem to be following．It seems that Americans like to diet almost as much as they like to eat．New types of diet plans are always coming out．Usually,though,they don't stay popular for long．
There are many diets on the market．It is often difficult to know which ones really work．It's also hard to believe how fast a dieter is supposed to shed pounds．A lot has been written about dieting．And some interesting facts about diets and foods have been discovered．
For example,did you know that the more celery you eat,the more weight you will lose?Celery has“negative”calories．The body burns up more calories digesting a piece of celery than there are in the celery stick itself．
Dieters?shun?potatoes because they think they are fattening．But they aren't．A potato has about the same number of calories as an apple．To gain a single pound,you would have to eat eleven pounds of potatoes!
Some dieters even worry about getting fat from licking postage stamps．But they have nothing to worry about．The glue on an average stamp has only about one-tenth of a calorie．Maybe a diet of post-age stamps would be popular?
This passage is all about______A.vegetables
B.fads
C.Americans
D.dieting
考题
Passage Three
Americans are well known for the strange diets they always seem to be following．It seems that Americans like to diet almost as much as they like to eat．New types of diet plans are always coming out．Usually,though,they don't stay popular for long．
There are many diets on the market．It is often difficult to know which ones really work．It's also hard to believe how fast a dieter is supposed to shed pounds．A lot has been written about dieting．And some interesting facts about diets and foods have been discovered．
For example,did you know that the more celery you eat,the more weight you will lose?Celery has“negative”calories．The body burns up more calories digesting a piece of celery than there are in the celery stick itself．
Dieters?shun?potatoes because they think they are fattening．But they aren't．A potato has about the same number of calories as an apple．To gain a single pound,you would have to eat eleven pounds of potatoes!
Some dieters even worry about getting fat from licking postage stamps．But they have nothing to worry about．The glue on an average stamp has only about one-tenth of a calorie．Maybe a diet of post-age stamps would be popular?
One could conclude from this passage that______A.dieting is not a healthy practice
B.everyone diets
C.there is only one good way to lose weight
D.dieting can be confusing
考题
Passage Three
Americans are well known for the strange diets they always seem to be following．It seems that Americans like to diet almost as much as they like to eat．New types of diet plans are always coming out．Usually,though,they don't stay popular for long．
There are many diets on the market．It is often difficult to know which ones really work．It's also hard to believe how fast a dieter is supposed to shed pounds．A lot has been written about dieting．And some interesting facts about diets and foods have been discovered．
For example,did you know that the more celery you eat,the more weight you will lose?Celery has“negative”calories．The body burns up more calories digesting a piece of celery than there are in the celery stick itself．
Dieters?shun?potatoes because they think they are fattening．But they aren't．A potato has about the same number of calories as an apple．To gain a single pound,you would have to eat eleven pounds of potatoes!
Some dieters even worry about getting fat from licking postage stamps．But they have nothing to worry about．The glue on an average stamp has only about one-tenth of a calorie．Maybe a diet of post-age stamps would be popular?
Celery is a good food for the dieter because______A.it has a lot of protein
B.vegetables are not fattening
C.it has“negative”calories
D.it is easy to digest
考题
共用题干
第二篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat.All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that"80 percent of the chil- dren of two obese（肥胖的）parents become obese , as compared with no more than 14 percent of the offspringof two parents of normal weight."How can obese people become normal or even thin through dieting? Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were sur- prising : by metabolic（新陈代谢的）measurement , fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet. They were anxious and depressed;some were suicidal.They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starvednonobese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight.Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could. They succeeded in increasing their weight by 20 to 25 percent.But months after the study ended,they were back to normal weight and stayed there.This does not mean that people are completely without hope in controlling their weight.It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight. The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range.The range might be as much as 9kg. Someone might weigh 60～69kg without too much effort. But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.The first paragraph tells us that our weight is determined by________.A:our eating habitsB:our life styleC:our work habitsD:our genes
考题
共用题干
第二篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat.All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that"80 percent of the chil- dren of two obese（肥胖的）parents become obese , as compared with no more than 14 percent of the offspringof two parents of normal weight."How can obese people become normal or even thin through dieting? Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were sur- prising : by metabolic（新陈代谢的）measurement , fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet. They were anxious and depressed;some were suicidal.They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starvednonobese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight.Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could. They succeeded in increasing their weight by 20 to 25 percent.But months after the study ended,they were back to normal weight and stayed there.This does not mean that people are completely without hope in controlling their weight.It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight. The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range.The range might be as much as 9kg. Someone might weigh 60～69kg without too much effort. But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.After leaving the hospital,the eight fat people_________.A:attempted suicideB:were back to their original weightC:went madD:followed the advice of Hirsch's
考题
共用题干
第三篇Eat More, Weigh Less, Live LongerClever genetic detective work may have found out the reason why a near-starvation diet prolonas the life of many animals.Ronald Kahn at Harvard Medical School in Boston,U.S.,and his colleagues navebeen able to extend the lifespan（寿命）of mice by 18 per cent by blocking the rodent's(啮齿动物）increase of fat in specific cells.This suggests that thinness一and not necessarily diet一Iromotes lonq life in"calorie（热量卡）restricted" animals."It's very cool work",says aging researche:Cynthia Kenyon of the University ot California, San Francisc."These mice eat all they want, lose weight and live longer.It's like heaven."Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents.Whether this works in humans is still unknown,partly because few people are willina to submit to such a strict diet.But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life.One theory is that eating less reduces the increase of harmful things that can damage cells.But Kahn's team wondered whether the animals simply benefit by becoming thin.To find out, they used biology tricks to disrupt the insulin（胰岛素）receptor (受体)gene in lab mice一but only in their fat cells."Since insulin is needed to help fat cells storefat ,these animals were protected against becoming fat,"explains Kahn.This slight genetic change in a single tissue had dramatic effects.By three months of age.Kahn's modified mice had up to 70 per cent less body fat than normal control mice,despite the fact that they ate 55 per cent more food per gram of body weight.In addition ,their lifespan increased.The average control mouse lived 753 days,while the thin rodents averaged a lifespan of 887 days.After three years,all the control mice had died.but one-quarter of the modified rodents were still alive."That they ciet these effects by just manipulating the fat cells is controversial,"saysLeonard Guarente of the Massachusetts Institute of Technology,who studies calorie restriction and aging.But Guarente says Kahn has yet to prove that the same effect is responsible forincreased lifespan in calorie-restricted animals."It might be the same effect or there might be two routes to long life,"he points out,"and that would be very interesting." What does the last sentence in the third paragraph imply?A:People like to lose weight,but they do not like to eat less.B:People want to go to heaven,but they do not want to die.C:Mice will go to heaven if they lose weight.D:Mice enjoy losing weight.
考题
共用题干
第二篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat.All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that"80 percent of the chil- dren of two obese（肥胖的）parents become obese , as compared with no more than 14 percent of the offspringof two parents of normal weight."How can obese people become normal or even thin through dieting? Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were sur- prising : by metabolic（新陈代谢的）measurement , fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet. They were anxious and depressed;some were suicidal.They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starvednonobese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight.Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could. They succeeded in increasing their weight by 20 to 25 percent.But months after the study ended,they were back to normal weight and stayed there.This does not mean that people are completely without hope in controlling their weight.It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight. The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range.The range might be as much as 9kg. Someone might weigh 60～69kg without too much effort. But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.Which of the following statements is true?A:Each person wants to eat to his heart's content.B:Each person has a weight range of 9kg.C:Each person has a natural weight range.D:Each person wants to control his weight.
考题
共用题干
第三篇Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."From Professor Barbara's experiment,we can learn that_________.A:people increase the number of calories they eat per day and gain weightB:the"low fat"yogurt group ate less calories later than the other groupC:two groups ate the same amount of yogurtD:people who eat low fat yogurt will not gain weight
考题
共用题干
第三篇Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."What lesson did the computer programmer learn?A:He shouldn't eat any sugar. B:He should only eat nonfat food.C:He shouldn't eat any food. D:He shouldn't eat too much.
考题
共用题干
第三篇Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."Which of the following contains fewer calories?A:Fat. B:Sugar.C:Protein and carbohydrates. D:Amino acids.
考题
共用题干
第三篇Americans still have been gaining weight,although they have cut their average fat intake from 36 to 34 percent of their total diets in the past 15 years.Indeed,cutting fat to control or lose weight makes sense. Fat has nine calories per gram. Protein and carbohydrates（碳水化合物）which break down into amino acids and simple sugars respectively,have just four. Moreover,the body uses fewer calories to metabolize（新陈代谢）fat than it does to metabolize other foods.But cutting fat from your diet doesn't necessarily mean your body won't store fat. For example, between nonfat and regular cookies,there's trivial difference in calories because manufacturers make up for the loss of fat by adding sugar. Low-fat crackers,soups and dressings can also be just as high in calories as richer versions.No matter where the calories come from,overeating will still cause weight gain.The calories from fat just do it a little quicker. A Wisconsin computer programmer who decided with a diet coach to eat only 40 grams of fat a day learned the lesson firsthand.He wasn't losing weight.Then he showed his food diary to his coach and revealed he'd been eating half a pound of jelly beans a day."They don't have any fat,"he explains.But they had enough sugar to keep him from losing an ounce.Nonfat foods become add-on foods.When we add them to our diet,we actually increase the number of calories we eat per day and gain weight. That was born out in a Pennsylvania State University study.For breakfast,Prof. Barbara Rolls gave two groups of women yogurt that contained exactly the same amount of calories.One group's yogurt label said"high fat”一the other,"low fat". The"low fat"yogurt group ate significantly more calories later in the day than the other group. "People think they've saved fat and can indulge themselves later in the day with no adverse consequences,"says Richard Mattes,a nutrition researcher at Purdue University."But when they do that,they don't compensate very precisely,and they often end up overdoing it."What can be inferred from the passage?A:To avoid being overweight,people should eat nonfat food.B:Nonfat and regular food have no difference in calories.C:Americans think it necessary to count calories of food.D:We can eat nonfat food as much as we like.
考题
共用题干
第三篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat. All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that,"80 percent of the children of two obese parents become obese,as compared with no more than 14 percent of the offspring of two parents of normal weight."How can obese people become normal or even thin through dieting?Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet.They were anxious and depressed;some were suicidal. They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starved non-obese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight. Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there.This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort.But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.What determines your weight?A:Your working manner. B:Your eating habit.C:Your life style. D:Your genes.
考题
共用题干
第三篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat. All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that,"80 percent of the children of two obese parents become obese,as compared with no more than 14 percent of the offspring of two parents of normal weight."How can obese people become normal or even thin through dieting?Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet.They were anxious and depressed;some were suicidal. They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starved non-obese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight. Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there.This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort.But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.What did Ethan Sims make his subjects do?A:Battle their genetic inheritance. B:Increase their weight.C:Stay at home. D:Lower their weight.
考题
共用题干
第三篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat. All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that,"80 percent of the children of two obese parents become obese,as compared with no more than 14 percent of the offspring of two parents of normal weight."How can obese people become normal or even thin through dieting?Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet.They were anxious and depressed;some were suicidal. They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starved non-obese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight. Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there.This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort.But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.What happened to the eight fat people after they left the hospital?A:They went mad. B:They killed themselves.C:They were back to normal weight. D:They attempted suicide.
考题
共用题干
第三篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat. All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that,"80 percent of the children of two obese parents become obese,as compared with no more than 14 percent of the offspring of two parents of normal weight."How can obese people become normal or even thin through dieting?Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet.They were anxious and depressed;some were suicidal. They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starved non-obese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight. Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there.This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort.But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.What did Jules Hirsch do in his study?A:He let the eight fat people skip supper.B:He let the eight fat people skip breakfast.C:He let the eight fat people run every morning and evening.D:He gave the eight fat people a liquid formula providing 600 calories a day.
考题
共用题干
第三篇The Best Way to Reduce Your WeightYou hear this:"No wonder you are fat. All you ever do is eat."You feel sad:"I skip my breakfast and supper. I run every morning and evening. What else can I do?"Basically you can do nothing. Your genes,not your life habits,determine your weight and your body constantly tries to maintain it.Albert Stunkard of the University of Pennsylvania found from experiments that,"80 percent of the children of two obese parents become obese,as compared with no more than 14 percent of the offspring of two parents of normal weight."How can obese people become normal or even thin through dieting?Well,dieting can be effective,but the health costs are tremendous.Jules Hirsch,a research physician at Rockefeller University,did a study of eight fat people.They were given a liquid formula providing 600 calories a day.After more than 10 weeks,the subjects lost 45kg on average.But after leaving the hospital,they all regained weight. The results were surprising:by metabolic measurement,fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems.They dreamed of food or breaking their diet.They were anxious and depressed;some were suicidal. They hid food in their rooms.Researchers warn that it is possible that weight reduction doesn't result in normal weight,but in an abnormal state resembling that of starved non-obese people.Thin people,however,suffer from the opposite:They have to make a great effort to gain weight. Ethan Sims,of the University of Vermont,got prisoners to volunteer to gain weight. In four to six months,they ate as much as they could.They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended,they were back to normal weight and stayed there.This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.The findings also provide evidence for something scientists thought was true一each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort.But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.What did scientists think was true?A:Each person has a fixed weight range.B:Each person has a weight range of 9 kg.C:Each person wants to control his weight.D:Each person wants to eat to his heart's content.
考题
问答题Tomorrow is Tuesday, I’ll spend five minutes warming up on the Versa-Climber. Then I’ll do 30 minutes on a stair mill. On Wednesday a personal trainer will work me like a farm animal for an hour. Thursday is “body wedge” class, which involves another exercise contraption (device). Friday will bring a 5.5-mile run, the extra half-mile my exhausting compensation of any gastrono mical (the art or science of good eating) indulgences during the week. I have exercised like this—obsessively, a bit persistently—for years, but recently I began to wonder: Why am I doing this? Except for a two-year period at the end of an unhappy relationship—a period when I self-medicated with lots of Italian desserts—I have never been overweight. One of the most widely accepted, commonly repeated assumptions in our culture is that if you exercise, you will lose weight. But I exercise all the time, and since I ended that relationship and cut most of those desserts, my weight has returned to the same 163 lb. it has been most of my adult life. I still have gut fat that hangs over my belt when I sit. Why isn’t all the exercise wiping it out? (1)________________. Of course, some people join and never go. Still, as one major study— the Minnesota Heart Survey-found, more of us at least say we exercise regularly. The survey ran from 1980, when only 47％of respondents said they engaged in regular exercise, to 2000, when the figure had grown to 57％. (2) ________________. Yes, it’s entirely possible that those of us who regularly go to the gym would weigh even more if we exercised less. But like many other people, I get hungry after I exercise, so I often eat more on the days I work out than on the days I don’t. Could exercise actually be keeping me from losing weight? (3) ________________. Today doctors encourage even their oldest patients to exercise, which is sound advice for many reasons: People who regularly exercise are at significantly lower risk for all manner of diseases—those of the heart in particular. They less often develop cancer, diabetes and many other ill-nesses. But the past few years of obesity research show that the role of exercise in weight loss has been wildly overstated. (4) ________________. Many recent studies have found that exercise isn’t as important in holding people lose weight as you hear so regularly in gym advertisements or on shows like The Biggest Loser—or, for that matter, from magazines like this one. (5) ________________. That causes us to eat more, which in turn can cancel out the weight-loss benefits we just accrued. Exercise, in other words, isn’t necessarily helping us lose weight. It may even be making it harder. (本文选自Time 2009年刊) [A] And yet obesity figures have risen dramatically in the same period: a third of Americans are obese, and another third count as overweight by the Federal Government’s definition. [B] The conventional wisdom that exercise is essential for shedding pounds is actually fairly new. As recently as the 1960s, doctors routinely advised against rigorous exercise, particularly for older adults who could injure themselves. [C] It’s a question many of us could ask. More than 45 million Americans now belong to a health club, up from 23 million in 1993. We spend some $19 billion a year on gym memberships. [D] The findings were surprising. On average, the women in all the groups, even the control group, lost weight, but the women who exercised—sweating it out with a trainer several days a week for six months—did not lose significantly more weight than the control subjects did. [E] The basic problem is that while it’s true that exercise burns calories and that you must burn calories to lose weight, exercise has another effect: it can stimulate hunger. [F] “In general, for weight loss, exercise is pretty useless,” says Eric Ravussin, chair in diabetes and metabolism (any basic process of organic functioning or operating) at Louisiana State University and a prominent exercise researcher. [G] Yes, although the muscle-fat relationship is often misunderstood. According to calculations published in the journalObesity Researchby a Columbia University team in 2001, a pound of muscle bums approximately six calories a day in a resting body, compared with the two calories that a pound of fat burns.
热门标签
最新试卷