C It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His 题目和参考答案——青夏教育精英家教网—

题目内容

It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worried, by the power of the technology he released upon the world.

The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict(证明…有罪) murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child.

Jeffrey said he and his colleagues made the discovery by accident while tracking genetic

variations(变异). But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents’ son.·In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two murders and helped convict another man.

DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples. The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person’s privacy. That includes a person’s medical history, racial origin or psychological profile. “There is the long-term risk that people can get into these samples and start getting additional information about a person’s paternity(父子关系) or risk of disease,” Jeffrey said.

DNA testing is not an unfailing proof of identity. Still, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey estimates the probability of two individuals’ DNA profiles matching in the most commonly used tests at one in a billion.

62. According to the text, DNA testing can NOT be used in _______ .

A. doing criminal investigations B. deciding faraily law

C. clearmg wrongly accused people D. telling twins apart

63. DNA samples are not popular with all the people because _______ .

A. the government in Britain establishes a criminal database

B. the US and Canada develop similar systems

C. DNA samples can be used to harm a person’s privacy

D. DNA testing is too expensive and dangerous now

64. Where will you most probably find this article?

A. In a guidebook. B. In a storybook.

C. In a science fiction. D. In a scientific magazine.

65. Which is the best title for the passage?

A. Discovery of DNA testing by Jeffery B. Practice of DNA testing in court

C. DNA testing in the present situation D.Benefits and side effects of DNA testing

62—65 DCDD

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相关题目

（2）提纲表格式

（2010·山东省临港一中高三上学期10月月考）

假设你是“中学生英语报”的记者，下面是对高中新生军训活动的民意调查。请根据表中的内容，用英语写篇调查报告，并表明你的态度。

赞同观点	强健体魄;磨炼意志;互相帮助;克服困难;增进友谊;学会守时;有利学习
反对观点	枯燥无趣；浪费时间

注意：1.适当增加细节，使内容连贯；

2.词数：100左右；

3.开头已给出,不计入总词数;

4．参考词汇：准时punctual 磨炼 build up

The freshmen have different opinions on the military training at the beginning of their school life.

________________________________________________________________________________________________________________________________________________________

III. 完形填空(共20小题;每小题分，满分20分)

阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

Catch of a Lifetime

He was 11 years old and often went fishing in a lake. On the day 36 the bass (鱸魚) season opened, he and his father were fishing early in the evening, 37 sunfish. Then he practiced casting. When his pole 38 , he knew something huge was 39 . His father watched 40 as the boy skilfully worked the fish alongside the dock. 41 , he very carefully lifted the 42 fish from the water. It was the largest one he had ever seen, 43 it was a bass. The father lit a match and looked at 44 . It was 10 P.M. — two hours before the season opened. He looked at the fish, then at the boy.

“You’ll have to 45 , son,” he said.

“Dad!” cried the boy.

“There will be other fish,” said his father.

“Not as big as this one,” cried the boy.

46 no one had seen them, nor could anyone ever know what time he caught the fish, the boy could 47 by his father’s firm voice that the decision was 48 . He obeyed and lowered it into the black 49 . The boy suspected that he would 50 again see such a great fish.

That was 34 years ago. Today, the boy is a successful architect. And he was 51 . He has never again landed such a magnificent fish as the one he 52 that night long ago. But he does see the same fish — again and again — 53 he comes up against a question of ethics (道德规范). for, as his father taught him, ethics are simple matters of right and wrong. It is only the 54 of ethics that is difficult. Do we do 55 when no one is looking?

36. A. until B. when C. after D. before

37. A. providing B. catching C. feeding D. supplying

38. A. broke down B. broke up C. turned over D. doubled over

39. A. on the other end B. in the dark

C. in the deep water D. on the other bank

40. A. with anxiety B. in surprise

C. with admiration D. with anger

41. A. Finally B. Unfortunately C. Actually D. Accordingly

42. A. active B. discouraged C. energetic D. exhausted

43. A. and B. but C. however D. yet

44. A. his watch B. the bass C. the sunfish D. the boy

45. A. bring it home B. put it aside C. put it back D. pick it up

46. A. Even though B. Now that C. Ever since D. In case

47. A. say B. tell C. speak D. talk

48. A. passed B. changed C. fixed D. refused

49. A. container B. sea C. water D. river

50. A. ever B. once C. then D. never

51. A. wrong B. right C. satisfactory D. pleased

52. A. caught B. saw C. cast D. threw

53. A. no time B. one time C. a time D. every time

54. A. standard B. concept C. practice D. idea

55. A. wrong B. right C. harm D. Good

Don't be discouraged. _____ things as they are and you will enjoy every day of your life.

A. Taking B. To take C. Take D. Taken

_____ and happy, Tony stood up and accepted the prize.

A. Surprising B. Surprised C. Being surprised D. To be surprising

14. There is no doubt__________since he is always a punctual person.

A. whether he will finish the work on time

B. if he will finish the work on time

C. that he will finish the work on time

D. how he will finish the work on time

This is my hometown, a small town _____ the edge of the big lake.

A. to B. on C. by D. from

Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy; there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity. Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me “textbook questions” about schooling, salary and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, “Now that we’ve finished with your lists, do you have questions of your own about science?”

After a long pause, a boy raised his hand, “Have you ever seen what a grassshopper（蚱蜢）eats? When I try eating leaves like that, I get a stomachache. Why?”

This began a set of questions that lasted nearly two hours.

Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less for an answer, no time for a child to think. When adults increase their “wait time” to three seconds or more, children give more logical, complete and creative answers.

Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with “That’s right” or “Very good.” These words work well when it comes to encouraging good behavior. But in talking about science, quick going by saying “That’s interesting” or “I’d never thought of it that way before,” or coming up with more questions or ideas.

Never push a child to “think”. It doesn’t make sense, children are always thinking, without your telling him what to do. What’s more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target for your disagreement.

Lastly, show, don’t tell. Real-life impressions of nature are far more impressive than any lessons children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass（放大镜）, and they’ll understand why you want them to wash before dinner. Rather than saying that water evaporates（蒸发）, set a pot of water to boil and let them watch the water level drop.

68.According to the passage, children are natural scientists, and to raise their interest, the most important thing for adults to do is ___________.

A.to let them see the world around

B.to share the children’s curiosity

C.to explain difficult phrases about science

D.to supply the children with lab equipment

69.Children can answer questions in a more logical, complete and creative way if adults _______.

A.ask them to answer quickly

B.wait for one or two seconds after a question

C.tell them to answer the next day

D.wait at least three seconds after a question

70.The author mentioned all of the following techniques for adults to share with their children’s curiosity EXCEPT that adults should _______________.

A.tell their children stories instead of reciting facts

B.offer their children chances to see things for themselves

C.be patient enough when their children answer questions

D.encourage their children to ask questions of their own

24. When we climbed up to the top of the mountain, we were all _______.

A. tired and out of the breath B. tiring and short of the breath

C. tired and out of breath D. tiring and short of breath

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