大学英语四级阅读分类真题3及答案解析.doc

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1、大学英语四级阅读分类真题 3 及答案解析(总分：100.00，做题时间：90 分钟)一、Reading Comprehensio(总题数：0，分数：0.00)二、Section A(总题数：0，分数：0.00)三、Passage One(总题数：1，分数：20.00)Walking, if you do it vigorously enough, is the overall best exercise for regular physical activity. It requires no equipment, everyone knows how to do it and it carr

2、ies the (1) risk of injury. The human body is designed to walk. You can walk in parks or along a river or in your neighborhood. To get (2) benefit from walking, aim for 45 minutes a day, an average of five days a week.Strength training is another important (3) of physical activity. Its purpose is to

3、 build and (4) bone and muscle mass, both of which shrink with age. In general, you will want to do strength training two or three days a week, (5) recovery days between sessions.Finally, flexibility and balance training are (6) important as the body ages. Aches and pains are high on the list of com

4、plaints in old age. The result of constant muscle tension and stiffness of joints, many of them are (7) , and simple flexibility training can (8) these by making muscles stronger and keeping joints lubricated (润滑). Some of this you do whenever you stretch. If you watch dogs and cats, youll get an id

5、ea of how natural it is. The general (9) is simple: whenever the body has been in one position for a while, it is good to (10) stretch it in an opposite position.AallowingBavoidableCbrieflyDcomponentEdeterminedFhelpingGincreasinglyHlowestImaintainJmaximumKpreventLprincipleMprovokeNseriouslyOtopic（分数

6、：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:_四、Passage Two(总题数：1，分数：20.00)So many people use the cell phones so frequently every day. But (1) little is certain about the health effects of its use. Manufacturers (2) that cell phones meet government standards for safe r

7、adio-frequency radiation emission, but enough studies are beginning to document a possible (3) in rare brain tumors (肿瘤), headaches and behavioral disorders in children to cause concern. So far, the evidence isnt (4) on whether the use of cell phones (5) to any increased risk of cancer. In a new tri

8、al, researchers asked 47 volunteers to (6) in a project to measure glucose (葡萄糖) consumption in the brain by scanning the brain to see how cells use energy. For both 50-minute scans, the volunteers had a cell phone (7) to each ear. During the first scan, the devices were turned off, but for the seco

9、nd scan, the phone on the right ear was (8) on and received a recorded-message call, although the volume was muted (消音) so the noise wouldnt bias the results. The results of the second scan showed that the (9) of the brain nearest to the device had higher rates of glucose consumption than the rest o

10、f the brain. The study shows that cell phones can change brain activity, and (10) a whole new avenue for scientific inquiry, though it doesnt say anything about whether cell-phone radiation can cause cancer.AconclusiveBcontributesCderiveDexpressesEfixedFimmenselyGincreaseHmaintainImissionJparticipat

11、eKparticularLprovidesMregionsNsurprisinglyOswitched（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:_五、Section B(总题数：0，分数：0.00)六、Passage One(总题数：1，分数：10.00)With the worlds population estimated to grow from six to nine billion by 2050, researchers, businesses and governm

12、ents are already dealing with the impact this increase will have on everything from food and water to infrastructure (基础设施) and jobs. Underlying all this (1) will be the demand for energy, which is expected to double over the next 40 years.Finding the resources to meet this demand in a (2) sustainab

13、le way is the cornerstone (基石) of our nations energy security, and will be one of the major (3) of the 21st century. Alternative forms of energybio-fuels, wind and solar, to name a feware 4 being funded and developed, and will play a growing (5) in the worlds energy supply. But experts say that, eve

14、n when (6) , alternative energy sources will likely meet only about 30% of the worlds energy needs by 2050.For example, even with (7) investments, such as the 93 million for wind energy development (8) in the American Recovery and Reinvestment Act, important alternative energy sources such as wind a

15、nd bio-fuels (9) only about 1% of the market today.Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of (10) both traditional and alternative.AstableBsolutionsCsignificantDroleEprogressFmarvelousGincludedHgrowthIexactlyJconsistKcompriseLcompetiti

16、onsMcombinedNchallengesOcertainly（分数：10.00）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:_七、Passage Two(总题数：1，分数：20.00)The popular notion that older people need less sleep than younger adults is a myth, scientists said yesterday.While elderly people (1) to sleep for fewer hour

17、s than they did when they were younger, this has a(n) (2) effect on their brains performance and they would benefit from getting more, according to research.Sean Drummond, a psychiatrist (心理医生) at the University of California, San Diego, said that older people are more likely to suffer from broken s

18、leep, while younger people are better at sleeping (3) straight through the night.More sleep in old age, however, is (4) with better health, and most older people would feel better and more (5) if they slept for longer periods, he said.“The ability to sleep in one chunk (整块时间) overnight goes down as

19、we age but the amount of sleep we need to (6) well does not change,“ Dr Drummond told the American Association for the Advancement of Science conference in San Diego.“Its (7) a myth that older people need less sleep. The more healthy an older adult is, the more they sleep like they did when they wer

20、e (8) . Our data suggests that older adults would benefit from (9) to get as much sleep as they did in their 30s. Thats (10) from person to person, but the amount of sleep we had at 35 is probably the same amount as we need at 75.“AalertBassociateCattractingDclingEcontinuingFdefinitelyGdifferentHeff

21、icientlyIformallyJfunctionKmixedLnegativeMsufficientNtendOyounger（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:_八、Section C(总题数：0，分数：0.00)九、Passage One(总题数：1，分数：10.00)What determines the kind of person you are? What factors make you more or less bold, intelligent, or

22、 able to read a map? All of these are influenced by the interaction of your genes and the environment in which you were (1) . The study of how genes and environment interact to influence (2) activity is known as behavioral genetics. Behavioral genetics has made important (3) to the biological revolu

23、tion, providing information about the extent to which biology influences mind, brain and behavior.Any research that suggests that (4) to perform certain behaviors are based in biology is controversial. Who wants to be told that there are limitations to what you can (5) based on something that is bey

24、ond your control, such as your genes? It is easy to accept that genes control physical characteristics such as sex, race and eye color. But can genes also determine whether people will get divorced, how (6) they are, or what career they are likely to choose? A concern of psychological scientists is

25、the (7) to which all of these characteristics are influenced by nature and nurture (教育), by genetic makeup and the environment. Increasingly, science (8) that genes lay the groundwork for many human traits. From this perspective, people are born (9) like undeveloped photographs: The image is already

26、 captured, but the way it (10) appears can vary based on the development process. However, the basic picture is there from the beginning.AabilitiesBachieveCappealDcomplaintsEcontributionsFdisplayedGessentiallyHeventuallyIextentJindicatesKproceedsLpsychologicalMraisedNsmartOstandard（分数：10.00）填空项 1:_填

27、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:_十、Passage Two(总题数：1，分数：20.00)When we think of green buildings, we tend to think of new onesthe kind of high-tech, solar-paneled masterpieces that make the covers of architecture magazines. But the U.S. has more than 100 million existing h

28、omes, and it would be (1) wasteful to tear them all down and (2) them with greener versions. An enormous amount of energy and resources went into the construction of those houses. And it would take an average of 65 years for the (3) carbon emissions from a new energy-efficient home to make up for th

29、e resources lost by destroying an old one. So in the broadest (4) , the greenest home is the one that has already been built. But at the same time, nearly half of U.S. carbon emissions come from heating, cooling and (5) our homes, offices and other buildings. “You cant deal with climate change witho

30、ut dealing with existing buildings,“ says Richard Moe, the president of the National Trust.With some (6) , the oldest homes tend to be the least energy-efficient. Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps th

31、at (7) over time and let in more outside air.Fortunately, there are a (8) number of relatively simple changes that can green older homes, from (9) ones like Lincolns Cottage to your own postwar home. And efficiency upgrades (升级) can save more than just the earth; they can help (10) property owners f

32、rom rising power costs.AaccommodationsBclumsyCdoubtfulDexceptionsEexpandFhistoricGincrediblyHpoweringIprotectJreducedKreplaceLsenseMshiftedNsupplyingOvast（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:_大学英语四级阅读分类真题 3 答案解析(总分：100.00，做题时间：90 分钟)一、Reading Comprehensio(总题

33、数：0，分数：0.00)二、Section A(总题数：0，分数：0.00)三、Passage One(总题数：1，分数：20.00)Walking, if you do it vigorously enough, is the overall best exercise for regular physical activity. It requires no equipment, everyone knows how to do it and it carries the (1) risk of injury. The human body is designed to walk. You

34、 can walk in parks or along a river or in your neighborhood. To get (2) benefit from walking, aim for 45 minutes a day, an average of five days a week.Strength training is another important (3) of physical activity. Its purpose is to build and (4) bone and muscle mass, both of which shrink with age.

35、 In general, you will want to do strength training two or three days a week, (5) recovery days between sessions.Finally, flexibility and balance training are (6) important as the body ages. Aches and pains are high on the list of complaints in old age. The result of constant muscle tension and stiff

36、ness of joints, many of them are (7) , and simple flexibility training can (8) these by making muscles stronger and keeping joints lubricated (润滑). Some of this you do whenever you stretch. If you watch dogs and cats, youll get an idea of how natural it is. The general (9) is simple: whenever the bo

37、dy has been in one position for a while, it is good to (10) stretch it in an opposite position.AallowingBavoidableCbrieflyDcomponentEdeterminedFhelpingGincreasinglyHlowestImaintainJmaximumKpreventLprincipleMprovokeNseriouslyOtopic（分数：20.00）填空项 1:_ （正确答案：H）解析：填空项 1:_ （正确答案：J）解析：填空项 1:_ （正确答案：D）解析：填空项

38、 1:_ （正确答案：I）解析：填空项 1:_ （正确答案：A）解析：填空项 1:_ （正确答案：G）解析：填空项 1:_ （正确答案：B）解析：填空项 1:_ （正确答案：K）解析：填空项 1:_ （正确答案：L）解析：填空项 1:_ （正确答案：C）解析：四、Passage Two(总题数：1，分数：20.00)So many people use the cell phones so frequently every day. But (1) little is certain about the health effects of its use. Manufacturers (2)

39、that cell phones meet government standards for safe radio-frequency radiation emission, but enough studies are beginning to document a possible (3) in rare brain tumors (肿瘤), headaches and behavioral disorders in children to cause concern. So far, the evidence isnt (4) on whether the use of cell pho

40、nes (5) to any increased risk of cancer. In a new trial, researchers asked 47 volunteers to (6) in a project to measure glucose (葡萄糖) consumption in the brain by scanning the brain to see how cells use energy. For both 50-minute scans, the volunteers had a cell phone (7) to each ear. During the firs

41、t scan, the devices were turned off, but for the second scan, the phone on the right ear was (8) on and received a recorded-message call, although the volume was muted (消音) so the noise wouldnt bias the results. The results of the second scan showed that the (9) of the brain nearest to the device ha

42、d higher rates of glucose consumption than the rest of the brain. The study shows that cell phones can change brain activity, and (10) a whole new avenue for scientific inquiry, though it doesnt say anything about whether cell-phone radiation can cause cancer.AconclusiveBcontributesCderiveDexpresses

43、EfixedFimmenselyGincreaseHmaintainImissionJparticipateKparticularLprovidesMregionsNsurprisinglyOswitched（分数：20.00）填空项 1:_ （正确答案：N）解析：解析 注意到空格后.little is certain about.是一个完整的句子，所以判断空格处应填副词。空格前是 But，表示转折，常见的搭配是 but unfortunately, but surprisingly。查看选项选出N。填空项 1:_ （正确答案：H）解析：解析 注意到空格后是宾语从句，所以判断空格处应填动词。空

44、格前是 Manufacturers，是一帮人，动词搭配常用 think，believe，suggest 等。查看选项选出 H：maintain(主张，坚称)。填空项 1:_ （正确答案：G）解析：解析 注意到空格前是 a possible，所以判断空格处应填单数名词。该句大意为：虽然制造商认为手机没有辐射问题，但是很多研究开始记录到一个可能的在肿瘤方面。猜测空格词义，查看选项选出 G。本题注意转折逻辑的考点。填空项 1:_ （正确答案：A）解析：解析 注意到空格前是 be 动词，判断空格处应填形容词。想一想和 evidence(证据)一词经常搭配的形容词，可猜测空格处为 strong，obvi

45、ous 等。查看选项选出 A：conclusive(令人信服的，确凿的)。填空项 1:_ （正确答案：B）解析：解析 注意到 whether 引导宾语从句，主语是 use，空格处要填谓语动词。空格后单词是 to，可以想到 lead to，contribute to 等固定搭配。查看选项选出 B。填空项 1:_ （正确答案：J）解析：解析 注意到 ask sb. to do sth. ，空格处要填动词不定式后面的动词原形。空格后单词是in，要注意介词的搭配。查看选项选出 J，构成 participate in(参与)这个固定搭配。填空项 1:_ （正确答案：E）解析：解析 空格所在句子是.the volunteers had a cell phone.to e