大学英语四级改革适用（阅读）模拟试卷261及答案解析.doc

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1、大学英语四级改革适用（阅读）模拟试卷 261 及答案解析(总分：100.00，做题时间：90 分钟)一、Reading Comprehensio(总题数：5，分数：100.00)1.Part III Reading Comprehension（分数：20.00）_2.Section A（分数：20.00）_Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was no small matter. M

2、iShels brother had become blind from a hereditary condition in his early 20s, and the Meissners had learned that the condition is a 1passed from mothers to sons. If they had a boy, he would have a 50 per cent chance of having the condition. A girl would be 2. The British couples inquiries about gend

3、er selection led them in 1999 to Virginia, US where a new sperm (精子)-separation technique, called MicroSort, was under 3. When MiShel became pregnant, she gave birth to a daughter. They will try to have a second daughter using the technique later this year. The technique separates sperm into two gro

4、upsthose that carry the X-chromosome (producing a female baby) and those that carry the Y-chromosome (producing a male baby). The technology was developed in 1990s, but last months opening of a laboratory in California 4the companys first expansion. “We believe the number of people who want this tec

5、hnology is greater than those who have 5to it,“ said Keith L. Blauer, the companys clinical director. This is not only a 6effective way to select a childs gender. It also brings a host of ethical (伦理的) and practical considerationsespecially for the majority of families who use the technique for 7rea

6、sons. The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked 8disease and to allow those who already have a child to balance“ their family by having a baby of the opposite sex The technology is still 9. However, Blauer says the company has an impressive su

7、ccess rate: 91 per cent of the women who become pregnant after sorting for a girl are successful, while 76 per cent who sort for a boy and get pregnant are successful. The technique separates sperm based on the fact that the X-chromosome is larger than the Y-chromosome. A machine is used to 10the si

8、ze differences and sort the sperm accordingly. The result is then checked using another type of DNA analysis to ensure that it contains mostly X-or Y-bearing sperm. The desired sample is then used for artificial insemination (授精) or test tube fertilization. A. genetic B. overlapped C. marked D. unaf

9、fected E. perpetually F. investigation G. access H. feat I. disorder J. gropes K. experimental L. seemingly M. elicit N. nonmedical O. distinguish（分数：20.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_The greenhouse effect causes trouble by raising the temperature of the pla

10、net. The 1rise is not very much, but the Earths ecosystem is very weak, and small changes can have large effects. It has been believed that this 2of one degree will happen by the year 2025. This could probably 3the North American corn belt, which produces much of the worlds grain, 4to much higher fo

11、od prices, and even less food for the Third World than they already have. However, it would also mean that some countries which are further north would be able to 5crops they had never been able to before, although there is less land as you move north from the corn belt. The other serious worry is t

12、hat rising sea levels from the melting of the polar ice could 6flood many countries. A rise in sea levels of one meter, which many experts are 7by the year 2100 (and some as soon as 2030), would flood 15 percent of Egypt, and 12 percent of Bangladesh. The Maldives in the Indian Ocean would almost 8d

13、isappear. Most of the countries which would suffer most from a rise in sea levels are the poor 9states, so the islands in the Caribbean, South Pacific, Mediterranean and Indian Ocean have formed the Alliance of Small Island States, AOSIS, so they have a 10voice in international politics and can make

14、 the richer developed world listen to their problems. A. severely B. damage C. island D. critical E. grow F. mainland G. louder H. predicting I. rise J. completely K. geometry L. actual M. extending N. leading O. develop（分数：20.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_

15、Many people wonder why some men want to live on the moon It is 1not the kind of place where most men would choose to live. But man has always moved to new areas. Some scientists hope that continued work will be done on the moon. Many experiments will be done there more 2. Some large 3are very easy t

16、o do in a place without air. Matter can be heated to very high temperatures without 4change when it is in such a place. Air, dust, and clouds cannot 5mans view of space from the moon. The very high or very low temperatures and low gravity on the moon will be used for many experiments. One very impor

17、tant use of the moon will be to 6spaceship. Man might be able to learn much about his own body by living on the moon. He would be living in a habitat that he made for himself. Man would be in control of the 7of life in which he lives. 8could be removed from the air in this community. Gravity is the

18、one thing that would not be under mans control. Some scientists believe the low gravity of the moon would be 9for man. The heart would not have to work so hard. The body would need less energy to move than it does on the earth However, the human body might change during long stays on the moon Much e

19、xercise would probably be needed to keep the body in good 10. A. community B. condition C. launch D. insight E. chemical F. mysterious G. experiments H. probably I. healthful J. easily K. extend L. render M. promptly N. block O. bacteria（分数：20.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项

20、1:_填空项 1:_填空项 1:_大学英语四级改革适用（阅读）模拟试卷 261 答案解析(总分：100.00，做题时间：90 分钟)一、Reading Comprehensio(总题数：5，分数：100.00)1.Part III Reading Comprehension（分数：20.00）_解析：2.Section A（分数：20.00）_解析：Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It

21、was no small matter. MiShels brother had become blind from a hereditary condition in his early 20s, and the Meissners had learned that the condition is a 1passed from mothers to sons. If they had a boy, he would have a 50 per cent chance of having the condition. A girl would be 2. The British couple

22、s inquiries about gender selection led them in 1999 to Virginia, US where a new sperm (精子)-separation technique, called MicroSort, was under 3. When MiShel became pregnant, she gave birth to a daughter. They will try to have a second daughter using the technique later this year. The technique separa

23、tes sperm into two groupsthose that carry the X-chromosome (producing a female baby) and those that carry the Y-chromosome (producing a male baby). The technology was developed in 1990s, but last months opening of a laboratory in California 4the companys first expansion. “We believe the number of pe

24、ople who want this technology is greater than those who have 5to it,“ said Keith L. Blauer, the companys clinical director. This is not only a 6effective way to select a childs gender. It also brings a host of ethical (伦理的) and practical considerationsespecially for the majority of families who use

25、the technique for 7reasons. The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked 8disease and to allow those who already have a child to balance“ their family by having a baby of the opposite sex The technology is still 9. However, Blauer says the compan

26、y has an impressive success rate: 91 per cent of the women who become pregnant after sorting for a girl are successful, while 76 per cent who sort for a boy and get pregnant are successful. The technique separates sperm based on the fact that the X-chromosome is larger than the Y-chromosome. A machi

27、ne is used to 10the size differences and sort the sperm accordingly. The result is then checked using another type of DNA analysis to ensure that it contains mostly X-or Y-bearing sperm. The desired sample is then used for artificial insemination (授精) or test tube fertilization. A. genetic B. overla

28、pped C. marked D. unaffected E. perpetually F. investigation G. access H. feat I. disorder J. gropes K. experimental L. seemingly M. elicit N. nonmedical O. distinguish（分数：20.00）填空项 1:_ （正确答案：I）填空项 1:_ （正确答案：D）填空项 1:_ （正确答案：F）填空项 1:_ （正确答案：C）填空项 1:_ （正确答案：G）填空项 1:_ （正确答案：L）填空项 1:_ （正确答案：N）填空项 1:_ （正

29、确答案：A）填空项 1:_ （正确答案：K）填空项 1:_ （正确答案：O）解析：解析：空白处应为原形动词。该句中的 size differences 和 sort 都表明机器起到“筛选”、“分辨”的作用，因此本题答案为 distinguish。The greenhouse effect causes trouble by raising the temperature of the planet. The 1rise is not very much, but the Earths ecosystem is very weak, and small changes can have larg

30、e effects. It has been believed that this 2of one degree will happen by the year 2025. This could probably 3the North American corn belt, which produces much of the worlds grain, 4to much higher food prices, and even less food for the Third World than they already have. However, it would also mean t

31、hat some countries which are further north would be able to 5crops they had never been able to before, although there is less land as you move north from the corn belt. The other serious worry is that rising sea levels from the melting of the polar ice could 6flood many countries. A rise in sea leve

32、ls of one meter, which many experts are 7by the year 2100 (and some as soon as 2030), would flood 15 percent of Egypt, and 12 percent of Bangladesh. The Maldives in the Indian Ocean would almost 8disappear. Most of the countries which would suffer most from a rise in sea levels are the poor 9states,

33、 so the islands in the Caribbean, South Pacific, Mediterranean and Indian Ocean have formed the Alliance of Small Island States, AOSIS, so they have a 10voice in international politics and can make the richer developed world listen to their problems. A. severely B. damage C. island D. critical E. gr

34、ow F. mainland G. louder H. predicting I. rise J. completely K. geometry L. actual M. extending N. leading O. develop（分数：20.00）填空项 1:_ （正确答案：L）填空项 1:_ （正确答案：I）填空项 1:_ （正确答案：B）填空项 1:_ （正确答案：N）填空项 1:_ （正确答案：E）填空项 1:_ （正确答案：A）填空项 1:_ （正确答案：H）填空项 1:_ （正确答案：J）填空项 1:_ （正确答案：C）填空项 1:_ （正确答案：G）解析：解析：此处应为形容词

35、，修饰 voice。词库中适合修饰 voice 的形容词只有 louder，表明贫穷的岛国联合起来就能在国际上发出更强的声音。Many people wonder why some men want to live on the moon It is 1not the kind of place where most men would choose to live. But man has always moved to new areas. Some scientists hope that continued work will be done on the moon. Many exp

36、eriments will be done there more 2. Some large 3are very easy to do in a place without air. Matter can be heated to very high temperatures without 4change when it is in such a place. Air, dust, and clouds cannot 5mans view of space from the moon. The very high or very low temperatures and low gravit

37、y on the moon will be used for many experiments. One very important use of the moon will be to 6spaceship. Man might be able to learn much about his own body by living on the moon. He would be living in a habitat that he made for himself. Man would be in control of the 7of life in which he lives. 8c

38、ould be removed from the air in this community. Gravity is the one thing that would not be under mans control. Some scientists believe the low gravity of the moon would be 9for man. The heart would not have to work so hard. The body would need less energy to move than it does on the earth However, t

39、he human body might change during long stays on the moon Much exercise would probably be needed to keep the body in good 10. A. community B. condition C. launch D. insight E. chemical F. mysterious G. experiments H. probably I. healthful J. easily K. extend L. render M. promptly N. block O. bacteria（分数：20.00）填空项 1:_ （正确答案：H）填空项 1:_ （正确答案：J）填空项 1:_ （正确答案：G）填空项 1:_ （正确答案：E）填空项 1:_ （正确答案：N）填空项 1:_ （正确答案：C）填空项 1:_ （正确答案：A）填空项 1:_ （正确答案：O）填空项 1:_ （正确答案：I）填空项 1:_ （正确答案：B）解析：解析：此处应为名词，与 in good 构成搭配。根据上一句的内容，及本句中的 much exercise 等词，可以推断本句表明如何保持身体健康，即 keep the body in good condition。