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It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DNA.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.29.In the last paragraph,a problem commercial genetic testing faces is__________
A.disorganized data collection
B.overlapping database building
C.excessive sample comparison
D.lack of patent evaluation
B.overlapping database building
C.excessive sample comparison
D.lack of patent evaluation
参考答案
参考解析
解析：本题属于精确细节题，最后一段谈到“批评者还认为商业基因测试只有有可比对样本才是有效的。一些公司使用的数据库并不依赖于数据的系统收集，而是从不同的研究项目中把数据堆砌在一起。这意味着DNA数据库可能由于公司处理结果的不同而不同。”由此，我们可以判断出答案应该为A。B和C的内容是对文中不同信息的嫁接，D是对最后一句内容的错误理解。
更多 “It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DNA.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.29.In the last paragraph,a problem commercial genetic testing faces is__________A.disorganized data collection B.overlapping database building C.excessive sample comparison D.lack of patent evaluation” 相关考题
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A young man was getting ready to gradually from college, for many months he bad 36 a beautiful sports car in a dealer’s showroom, and 37 his father could well 38 it, he told him that was all he wanted.On the morning of his gradation day his father called him into his own study and told him how 39 he was to have such a fine son. He handed his son a beautiful gift box. 40 but slightly disappointed, the young man 41 the box and found a lovely book, 42, he raised his voice at his father and said. ” 43 all your money you give me a book?” And rushed out of the house 44 the book in the studyHe did not contact（联系）his father for a whole year 45 one day he saw in the strict an old man who looked like his father. He 46 he bad to go back home and see his father.When he arrived at his father’s house, he was told that his father had been in hospital for a week. The moment he was about to 47 the hospital. he saw on the desk the 48 new book ,just as he had left it one 49 ago. he opened it and began to 50 the pages. suddenly, a car key 51 from an envelope taped behind the book ,it bad a lag（标签）with dealer’s name, the 52 dealer who had the sports car he bad 53 on the tag was the 54 of his graduation. and the 55 PAID IN FULL36. A. expected. B. enjoyed. C. admired. D. owned
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If parents bring up a child with the sole aim of turning the child into a genius, they will cause a big problem. According to several leading educational psychologists, this is one of the biggest mistakes which ambitious parents make. Generally, the child will be only too aware of what the parent expects, and will fail. Unrealistic parental expectations can cause great damage to children. However, if parents are not too unrealistic about what they expect their children to do, but are ambitious in a reasonable way, the child may succeed in doing very well—especially if the parents are very supportive of their child. Michael Lee Chao Tin is very lucky. He is crazy about music, and his parents help him a lot by taking him to concerts and arranging private piano and violin lessons for him. They even drive him 50 kilometers a week for violin lessons. Although Michael’s mother knows very little about music, Michael’s father is a good trumpet player. However, he never makes Michael enter music competitions if he is unwilling. Michael’s friend, Winston Chiu Fang Weng, however, is not so lucky. Although both his parents are successful musicians, they set too high a standard for Winston. They want their son to be as successful as they are and so they enter him for every piano competition held. They are very unhappy when he does not win. “When I was your age, I used to win every competition I entered,” Winston’s father tells him. Winston is always afraid that he will disappoint his parents and now he always seems quiet and unhappy.61.Which of the following mistakes are parents likely to make according to the passage?A.To neglect their child’s education.B.To help their child to be a genius.C.To expect too much of their child.D.To make their child become a musician.62.What should parents do in order to help their children succeed?A.They should push the children into achieving a lot.B.They should try to have their own successful careers.C.They should arrange private lessons for their children.D.They should understand and help their children in difficult times.63.Which of the following statements about Michael Lee’s parents is true?A.His father is a very poor player of trumpet.B.His parents are quite rich and have a car.C.His parents help him in a proper way.D.His mother knows much about music.64.Winston’s parents push their son so much that __________.A.he has succeeded in a lot of competitionsB.he is unhappy because he is not self-confidentC.he feels he cannot learn anything about music from themD.he has already become a better musician than his father65.The two examples illustrate the principle that __________.A.successful parents often have unsuccessful childrenB.it is important to let children develop in the way they wantC.parents who want their child to be musical should also be good musiciansD.the more money spent on a child’s education, the better the child will do
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Text 2 It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom – or at least confirm that he’s the kid’s dad. All he needs to do is shell our $30 for paternity testing kit (PTK) at his local drugstore – and another $120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fog, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public , ranging in price from a few hundred dollars to more than $2500.Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and latest rage a many passionate genealogists-and supports businesses that offer to search for a family’s geographic roots .Most tests require collecting cells by webbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.But some observers are skeptical, “There is a kind of false precision being hawked by people claiming they are doing ancestry testing,” says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which a passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.26.In paragraphs 1 and 2 , the text shows PTK’s ___________.[A]easy availability[B]flexibility in pricing[C] successful promotion[D] popularity with households
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The Browns are ( 11) Smiths neighbors． Mr Brown's name is John． But when his neighbors talk about him，they ( 12 ) him "Mr Going-to-do ． Do you know why? Mr Brown always says he is going to do something，but he ( 13) does it．Every Saturday， Mr Brown ( 14 ) to the Smiths back door and talks to Mr Smith． He always says he ( 15 ) do something．"I，m going to clean my house today，"he says，( 16 ) "I'm going to wash my car tomor-row，"or"These trees in front of my house'are ( 17) big，l m going to cut them down next week．"Mr Smith usually says，"( 18) ，John?"He knows his neighbor is not going to clean his house，or wash his car，or cut down any trees． Then he says，"Well，excuse me，John． I-m going to do some work in the house． "And he ( 19) ．Mr and Mrs Smith often say to their only child Dick，"Are you going to do something?Then do it． Don-t be ( 20) 'Mr Going-to-do'．( )11．A．theB．a．C．oneD．/
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DIt’s not easy being a teenager (13至19岁青少年) – nor is it easy being the parent of a teenager. You can make your child feel angry, hurt, or misunderstood by what you say without realizing it yourself. It is important to give your child the space he needs to grow while gently letting him know that you’ll still be there for him when he needs you.Expect a lot from your child, just not everything. Except for health and safety problems, such as drug use or careless driving, consider everything else open to discussion. If your child is unwilling to discuss something, don’t insist he tell you what’s on his mind. The more you insist, the more likely that he’ll clam up. Instead, let him attempt to solve (解决) things by himself. At the same time, remind him that you’re always there for his should he seek advice or help. Show respect for your teenager’s privacy (隐私). Never read his mail or listen in on personal conversations.Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long, tell him he can talk for 15 minutes, but then he must stay off the phone for at least an equal period of time. This not only frees up the line so that other family members can make and receive calls, but teaches your teenager moderation (节制). Or if you are open to the idea, allow your teenager his own phone that he pays for with his own pocket money or a part-time job.68. The main purpose of the text is to tell parents ______.A. how to get along with a teenagerB. how to respect a teenagerC. how to understand a teenagerD. how to help a teenager grow up
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Passage OneQuestions 21 to 25 are based on the following passage.How often one hears children wishing they were grown up, and old people wishing they were young again. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets.Childhood is a time when there are few responsibilities. If a child has good parents, he is well fed, looked after and loved. It is unlikely that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the child-things that have lost their interest for older people because they are too well known. A child finds pleasure in playing in the rain, or in the snow. His first visit to the seaside is a marvelous adventure．But a child has his pains：he is not so free to do as he wishes as he thinks older people are; he is continually being told what to do and what not to do．Therefore, a child is not happy as he wishes to be.When the young man starts to earn his own living, he becomes free from the discipline of school and parents; but at the same time he is forced to accept．responsibilities. With no one to pay for his food, his clothes, or his room, he has to work if he wants to live comfortably. If he spends most of his time playing about in the way that he used to as a child, he will go hungry. And if he breaks the laws of society as he used to break the laws of his parents, he may get himself into trouble. If, however, he works hard, goes by the law and has good health, he may feel satisfied in seeing himself make steady progress in his job and in building up for himself his own position in society.Old age has always been thought of as the worst age to be; but it is not necessary for the old to be unhappy. With old age comes wisdom and the ability to help others with advice wisely given. The old can have the joy of seeing their children making progress in life; they can watch their grandchildren growing up around them; and, perhaps best of all, they can, if their life has been a useful one, feel the happiness of having come through the battle of life safely and of having reached a time when they can lie back and rest, leaving everything to others.21．The happiest people should be those whoA．face up to difficulties in lifeB．hope to be young againC．enjoy life in different agesD．wish to be grown up
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23 ．A child has his pains because＿．A．he can not do whatever he wants toB．he is not allowed to play in rainC．he has a lot of new things to learnD. he can not play at the seaside freely
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根据下面内容，回答 68~71题：DIt’s not easy being a teenager(13至19岁青少年)-nor is it easy being the parent of a teenager．You can make your child feel angry, hurt or misunderstood by what you say without realizing it yourself．It is important to give your child the space he needs to grow while gently letting him know that you’11 still be there for him when he needs you．Expect a lot from your child，just not everything．Except for health and safety problems， such as drug use or careless driving，consider everything else open to discussion．If your child is unwilling to discuss something，don’t insist he tell you what’s on his mind．The more you insist， the more likely that he’11 clam up．Instead，let him attempt to solve(解决)things by himself. At the same time，remind him that you’re always there for him should he seek advice or help．Show respect for your teenager’s privacy(隐私)．Never read his mail or listen in on personal conversations．Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long，tell him he can talk for l5 minutes，but then he must stay off the phone for at least all equal period of time．This not only frees up the line so that other family members can make and receive calls，but teaches your teenager moderation(节制).Or if you are open to the idea，allow your teenager his own phone that he pays for with his own pocket money or a part-time job.第13题：The main purpose of the text is to tell parents__________.A．how to get along with a teenagerB．how to respect a teenagerC．how to understand a teenagerD．how to help a teenager grow up
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Wolfgang's father told him he couldn't play the piano yet because______.A. his sister was taking lessonsB. he had to help his motherC. he was too smallD. he had to wait for his sister to finish practising
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根据下列文章，回答26～30题。It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom—or at least confirm that he’s the kid’s dad. All he needs to do is shell out $30 for a paternity testing kit (PTK) at his local drugstore—and another $120 to get the results.More than 60,000 people have purchased the PTKs since they first became available without prescriptions last years, according to Doug Fogg, chief operating officer of Identigene, which makes the overthecounter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $2500.Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family’s geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA．But some observers are skeptical, “There is a kind of false precision being hawked by people claiming they are doing ancestry testing,” says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other greatgrandparents or, four generations back, 14 other greatgreatgrandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person’s test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.第 26 题 In paragraphs 1 and 2 , the text shows PTK’sA．easy availability.B．flexibility in pricing.C．successful promotion.D．popularity with households.
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He is ( ) a child.He should be allowed to make his own decisionA、foreverB、no longerC、absolutelyD、exactly
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根据内容，回答 下面问题：It’s not easy being a teenager-nor is it easy being the parent of a teenager. You can make your child feel angry, hurt, or misunderstood by what you say without realizing it yourself. It is important to give your child the space he needs to grow while making him realize that you’ll still be there for him when he needs you. Expect a lot from your child, just not everything. Except for health and safety problems, such as drug use or careless driving, consider everything else open to discussion. If your child is unwilling to discuss something, don’t insist he tell you what’s on his mind. The more you insist, the more likely that he’ll clam up. Instead, let him attempt to solve (解决) things by himself. Show respect for your teenager’s privacy (隐私). Never read his mail or listen in on personal conversations. Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long, tell him he can talk for 15 minutes, but then he must stay off the phone for at least an equal period of time. This not only frees up the line so that other family members can make and receive calls, but teaches your teenager moderation (节制). Or if you are open to the idea, allow your teenager his own phone that he pays for with his own pocket money or a part-time job.第12题：The text suggests that in the future we_________________.A． may have to fight against more new diseasesB． may easily get infected by diseases from dogsC． should not be allowed to have petsD． should stop buying pets from Africa
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Why can’t the man concentrate on his study?A. He keeps thinking of going to the movies. B. His classmates are taking a break.C. He’s been studying for too long.
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A child has his pains because______.A．he can not do whatever he wants toB．he is not allowed to play in rainC．he has a lot of new things to learnD．he can not play at the seaside freely
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A young man was getting ready to graduate from college, for many months he had admired a beautiful sports car in a dealer's showroom, and 21 his father could well afford it, he told him that was all he wanted．
On the morning of his graduation day, his father called him into his own study and told him how 22 he was to have such a fine son. He handed his son a beautiful gift box. Curious but slightly disappointed, the young man 23 the box and found a lovely book. Angrily, he raised his voice at his father and said．" 24 all your money you give me a book? " And rushed out of the house leaving the book in the study.
He did not contact his father for a whole year 25 one day he saw in the street an old man who looked like his father. He realized he had to go back home and see his father.
When he arrived at his father's house, he was told that his father had been in hospital for a week. The moment he was about to 26 the hospital. He saw on the desk the still new book, just as he had left it one 27ago. He opened it and began to turn the pages. Suddenly, a car key 28 from an envelope taped behind the book, it had a tag with dealer's name, the same dealer who had the sports car he had 29 on the tag was the date of his graduation, and the 30 :
PAID IN FULL.
____21___A.finding
B.proving
C.deciding
D.knowing
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"He looks normal." That′ s what everybody says when I tell them my son was just diagnosed as autism (孤独症). They all say it without exception.
It′s true. Alejandro does look like every other 31 boy. He plays, he smiles, and he runs around with the two-year-old boy′ s boundless energy until he is too tired. He laughs when you move your fingers 32 on a sensitive part of his body. And he often plays with his toys like every other young child at his age.
But most of the time, Alejandro 33 in his own little world playing with his toys all by himself even in a group of kids and ignoring you when you talk to him loudly. At that time he′s alone, no matter how hard you try to 34 him.
My wife and I get 35 .We ask for "nose kisses" or hugs and many times he doesn′t notice us. It′s extremely anxious when your child′s face is right in front of you and he won′t admit your presence.
He regularly doesn′t eat. The food often bothers him when he puts it in his mouth. He is very small 36 his age. We are told that it′s another effect of the autism.
Because autism isn′t like some other 37 , there is no set treatment. Each child needs to be treated 38 ; what works for one probably doesn′t work for another. Try a treatment. If it doesn′t work, you have to try another39 you hopefully find something that does work.
The future is cloudy, but we will try everything we can do to reach him, because we love him and we know he′s a special little boy. And we believe with the help of love, we can 40 any difficulty.
第（32）题选A.lightly
B.secretly
C.heavily
D.greatly
考题
A young man was getting ready to graduate from college, for many months he had admired a beautiful sports car in a dealer's showroom, and 21 his father could well afford it, he told him that was all he wanted．
On the morning of his graduation day, his father called him into his own study and told him how 22 he was to have such a fine son. He handed his son a beautiful gift box. Curious but slightly disappointed, the young man 23 the box and found a lovely book. Angrily, he raised his voice at his father and said．" 24 all your money you give me a book? " And rushed out of the house leaving the book in the study.
He did not contact his father for a whole year 25 one day he saw in the street an old man who looked like his father. He realized he had to go back home and see his father.
When he arrived at his father's house, he was told that his father had been in hospital for a week. The moment he was about to 26 the hospital. He saw on the desk the still new book, just as he had left it one 27ago. He opened it and began to turn the pages. Suddenly, a car key 28 from an envelope taped behind the book, it had a tag with dealer's name, the same dealer who had the sports car he had 29 on the tag was the date of his graduation, and the 30 :
PAID IN FULL.
____30___A.words
B.information
C.date
D.carD.
考题
It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DNA.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.An appropriate title for the text is most likely to be__________.A.Fors and Againsts of DNA testing
B.DNA Testing and It's Problems
C.DNA Testing Outside the Lab
D.Lies Behind DNA Testing
考题
It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DNA.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.27.PTK is used to__________.A.locate one's birth place
B.promote genetic research
C.identify parent-child kinship
D.choose children for adoption
考题
It is a wise father that knows his own child,but today a man can boost his paternal（fatherly）wisdom–or at least confirm that he's the kid's dad.All he needs to do is shell our$30 for paternity testing kit（PTK）at his local drugstore–and another$120 to get the results.More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years,according to Doug Fog,chief operating officer of Identigene,which makes the over-the-counter kits.More than two dozen companies sell DNA tests Directly to the public,ranging in price from a few hundred dollars to more than$2,500.Among the most popular:paternity and kinship testing,which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots.Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing.All tests require a potential candidate with whom to compare DNA.But some observers are skeptical,"There is a kind of false precision being hawked by people claiming they are doing ancestry testing,"says Trey Duster,a New York University sociologist.He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back.Yet most ancestry testing only considers a single lineage,either the Y chromosome inherited through men in a father's line or mitochondrial DNA,which is passed down only from mothers.This DNA can reveal genetic information about only one or two ancestors,even though,for example,just three generations back people also have six other great-grandparents or,four generations back,14 other great-great-grandparents.Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects.This means that a DNA database may have a lot of data from some regions and not others,so a person’s test results may differ depending on the company that processes the results.In addition,the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.26.In paragraphs 1 and 2,the text shows PTK's___________.A.easy availability
B.flexibility in pricing
C.successful promotion
D.popularity with households
考题
He will surely finish the job on time___________ he′ s left to do it in his own way.A.in that
B.so long as
C.in case
D.as far as
考题
What can be inferred about Mr. Dave Lincoln’s trip?
A. He drove his own automobile
B. He stayed at numerous hotels.
C. He stayed longer than he needed to be.
D. He went to attend a convention.
考题
单选题— ______? —I know he spends at least much time watching TV as he does doing his lessons.A
Do you know what Tom does all dayB
Do you know how Tom does his lessonsC
How do you like Tom’s holidayD
What does Tom do with his TV
考题
单选题The selection is mainly about .A
how the narrator’s father diedB
the inner feelings of the narrator as he visits his dying fatherC
the narrator’s childhood memories of his fatherD
the narrator’s relationship with his aunt
考题
单选题The naughty boy（）in his shoes when he saw the cane in his father's hand.A
shiveredB
trembledC
frightenedD
feared
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