公共英语三级-24及答案解析.doc

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1、公共英语三级-24 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、Part A(总题数：0，分数：0.00)三、Text 1(总题数：1，分数：25.00)Computers may one day turn night into day with good old，natural sunlight Colossal computer-controlled mirrors, thousands of feet across, may one day orbit the earth， reflecting su

2、nlight onto a darkened United States Some Scientists say that 16 of these mirrors， each about a half mile across, could aim their reflected light at one area on the earth that was about 200 miles by 300 miles. That much light would equal about 56 moons. The mirrors would be so high that they could c

3、atch the sun“s light as it was shining on the other side of the earth. The mirrors could orbitthousands of miles highat the same speed as the earth turns on its axis (轴). That way, the mirrors would always be over the same spot. The aluminum-coated (涂铝的), plastic mirrors could be folded up and packe

4、d into a spaceship, according to the scientists. Once released a few hundred miles in space, the mirrors, powered by a solar-powered engine, could mark the rest of the trip into space on their own. The scientists say that the computer-controlled mirrors could also be made to tilt (倾斜) slowly, so the

5、 reflected sunlight would sweep slowly along the surface of the earth. For example, as night fell, the mirrors could be tilted to light up Boston. Later on, as darkness spread slowly westward. Chicago, for example, then San Francisco could be lit up. The reflected sunlight would allow these cities t

6、o save up electricity. And in emergencies, such as power-failures, the mirrors could light up the affected area. What no one knows yet is what effect this artificial daytime would have on plants, animals, and humans. Would it confuse some animals and harm plants that are used to regular day-night cy

7、cles? The scientists recommend that studies be done to find out what effects there might be.（分数：25.00）(1).The word “colossal“ in Line 3 most likely means _.（分数：5.00）A.nuclear-poweredB.orbitingC.giantD.spinning(2).Which of the following is NOT TRUE of the mirrors? _（分数：5.00）A.They would be made of pl

8、astic and coated with aluminumB.They could be launched directly into space.C.They would stay in the same position over the earth.D.They could reflect sunlight to a large area on the earth.(3).The reflected light should sweep slowly along the surface of the earth because the mirrors _.（分数：5.00）A.woul

9、d be operated by solar-powered enginesB.would orbit thousands of miles high to catch the sun“s lightC.could move around the earth at the same speed as the earth turns on its axisD.could be made to adjust their angles(4).The purpose for slowly tilting the mirrors in space is to _.（分数：5.00）A.confuse a

10、nimals and plantsB.light up more citiesC.save energy and deal with emergenciesD.enable people to work longer hours(5).According to the last paragraph, the effects of the mirrors on living things are _.（分数：5.00）A.obviousB.uncertainC.unimportantD.positive四、Text 2(总题数：1，分数：25.00)Some pessimistic expert

11、s feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeabl

12、e future. The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types. Regardless of its power source, the

13、 auto in the future will still be the main problem in urban traffic congestion (拥挤). One proposed solution to this problem is the automated highway system. When the auto enters the highway system, a retractable (可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to thos

14、e powering subway trains electrically. once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car“s movements. The driver will use a telephone to dial instructions abou

15、t his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wait for the buzzer ( 蜂鸣器) that will warn him of his coming exit. It is estimated that an automated

16、 highway will be able to handle 10,000 vehicles per hour, compared with the 1,500 to 2,000 vehicles that can be carried by a present-day high-way.（分数：25.00）(1).According to the author, the car will be improved in the following aspects except _.（分数：5.00）A.its power sourceB.its sizeC.its monitoring sy

17、stemD.its security(2).What is the author“s main concern? _（分数：5.00）A.How to render automobiles pollution-free.B.How to make smaller and safer automobiles.C.How to solve the problem of traffic jams.D.How to develop an automated subway system.(3).What provides autos with electric power in an automated

18、 highway system? _（分数：5.00）A.A railB.An engineC.A retractable armD.A computer controller(4).In an automated highway system, all the driver needs to _.（分数：5.00）A.keep in the right laneB.wait to arrive at his destinationC.keep in constant touch with the computer centerD.inform the system of his destin

19、ation by phone(5).The author“s attitude toward the future of autos is _.（分数：5.00）A.obscureB.pessimisticC.optimisticD.cautious五、Text 3(总题数：1，分数：25.00)If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains

20、are not getting enough exerciseand as a result, we are ageing unnecessarily soon. Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slo

21、wed down. With a team of colleagues at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. Computer technology enabled the researchers to obtain precise measurements of the volume of the front and side sections of the brain,

22、 which relate to intellect (智能) and emotion, and determine the human character. (The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional faculties. Contraction of front and side parts

23、as cells die ofwas observed in some subjects in their thirties, but it was still not evident in some sixty-and seventy- year-olds. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with ageusing the head. The findings show in general terms that c

24、ontraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the far

25、m worker, bus driver and shop assistant. Matsuzawa“s findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain ceils need. “The best way to maintain good blood circulation is through using the brain,“ he says, “Th

26、ink hard and engage in conversation. Don“t rely on pocket calculators. “（分数：25.00）(1).According to the Japanese doctors, the reason for ageing is that _.（分数：5.00）A.our brain is too smallB.our brain lacks enough exerciseC.people are too intelligentD.People live longer(2).In order to finish this resea

27、rch, the doctors need to measure _.（分数：5.00）A.brain size of farmers in northern JapanB.blood pressure a thousand old peopleC.brain volumes of different peopleD.the latest development of computer technology(3).The doctor“s test shows that _.（分数：5.00）A.our brains shrink as we grow olderB.the front sec

28、tion of the brain does not shrinkC.sixty-year-olds have the better brains than thirty-year-oldsD.some people“s brains have contracted more than other people“s(4).The word “subjects“ in Paragraph 5 means _.（分数：5.00）A.something to be consideredB.branches of knowledge studiedC.persons chosen to be stud

29、ied in an experimentD.any member of a state except the supreme ruler(5).According to the passage, which people seem to age slower than the others? _（分数：5.00）A.lawyersB.farmersC.clerksD.shop assistants六、Part B(总题数：1，分数：25.00)Abbey: You can always recognize dieters from the sour expression on their fa

30、ces. They spend most of their time turning their noses up at food. They are forever consulting calorie charts, gazing at themselves in mirrors, and leaping on to weighing-machines in the bathroom. They spend a lifetime fighting a losing battle against spreading hips, protruding tummies and double ch

31、ins. What a miserable lot dieters are! Marlin: I began making some dietary and lifestyles changes during my second year of college and have been eating this way ever since. I like the way I feel when I don“t eat animal foods so much more than the pleasure I used to get from eating them. I have much

32、more energy; I need less sleep; I feel calmer; I can maintain an ideal body weight without worrying about how much I eat, and I can think more clearly. Maggie: During my first year of college, I gained forty pounds when I began throwing the javelin. For the next twenty years, I carried all of this e

33、xtra weight and kidded myself that I was in good shape since that“s what I weighed in college. Now that I“ve lost all that extra weight, I feel great! People say all the time, “Well, how do you live without eating cheeseburgers or this or that?“ and I say, “You just don“t. It“s not even an option. I

34、t“s not that hard once you get on it.“ Belinda： If you are on a diet, you“re always hungry. You can“t be hungry and happy at the same time. All the horrible concoctions you eat instead of food leave you permanently dissatisfied. A complete food it may be, but not quite as complete as juicy steak. So

35、 at least three times a day you will be exposed to temptation. How miserable to watch others tucking into piles of mouth-watering food while you munch a water biscuit and sip unsweetened lemon juice! And if hunger just proves too much for you, in the end you will lash out and devour five huge guilt-

36、inducing cream cakes at a sitting Then things will turn out to be even worse Wood： I went on diet when my doctor told me that my blood pressure tended to be high. only at that time did I realize the danger of being overweight. Since I began making dietary changes in 1982，eating this way has become i

37、ncreasingly acceptedI dont feel I“ve lost something after dietingInstead, I“ve got something valuable. That is good health. Now match each of the persons to the appropriate statement.Note: there are two extra statements . Statements ABeing on a diet is a torture. BI feel better with vegetarian food.

38、 CIt is not difficult to have a diet. DI began dieting for the sake of health. EDieting enables people to enjoy life more. FDieting simply causes endless worries. GOne should have a strict control of oneself during a diet.（分数：25.00）(1).Abbey（分数：5.00）(2).Marlin（分数：5.00）(3).Maggie（分数：5.00）(4).Belinda（

39、分数：5.00）(5).Wood（分数：5.00）公共英语三级-24 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、Part A(总题数：0，分数：0.00)三、Text 1(总题数：1，分数：25.00)Computers may one day turn night into day with good old，natural sunlight Colossal computer-controlled mirrors, thousands of feet across, may one day orbit

40、the earth， reflecting sunlight onto a darkened United States Some Scientists say that 16 of these mirrors， each about a half mile across, could aim their reflected light at one area on the earth that was about 200 miles by 300 miles. That much light would equal about 56 moons. The mirrors would be s

41、o high that they could catch the sun“s light as it was shining on the other side of the earth. The mirrors could orbitthousands of miles highat the same speed as the earth turns on its axis (轴). That way, the mirrors would always be over the same spot. The aluminum-coated (涂铝的), plastic mirrors coul

42、d be folded up and packed into a spaceship, according to the scientists. Once released a few hundred miles in space, the mirrors, powered by a solar-powered engine, could mark the rest of the trip into space on their own. The scientists say that the computer-controlled mirrors could also be made to

43、tilt (倾斜) slowly, so the reflected sunlight would sweep slowly along the surface of the earth. For example, as night fell, the mirrors could be tilted to light up Boston. Later on, as darkness spread slowly westward. Chicago, for example, then San Francisco could be lit up. The reflected sunlight wo

44、uld allow these cities to save up electricity. And in emergencies, such as power-failures, the mirrors could light up the affected area. What no one knows yet is what effect this artificial daytime would have on plants, animals, and humans. Would it confuse some animals and harm plants that are used

45、 to regular day-night cycles? The scientists recommend that studies be done to find out what effects there might be.（分数：25.00）(1).The word “colossal“ in Line 3 most likely means _.（分数：5.00）A.nuclear-poweredB.orbitingC.giant D.spinning解析：解析 释义题。题干意为“第二行中的colossal一词最可能的意思是”。A 项意为“核动力的”，B 项意为“按轨道运行的”，C

46、 项意为“巨大的”，D 项意为“旋转的”。根据题干定位至文章第三行，句中 thousands of feet across 作为后置定语修饰 colossal computer-controlled mirrors，由此推断，这些电脑控制的镜子有数千英尺宽，非常庞大。C 选项符合题意，故 C 为正确答案。(2).Which of the following is NOT TRUE of the mirrors? _（分数：5.00）A.They would be made of plastic and coated with aluminumB.They could be launched d

47、irectly into space. C.They would stay in the same position over the earth.D.They could reflect sunlight to a large area on the earth.解析：解析 细节题。题干意为：“对于镜子的描述，以下哪个是不正确的?”该题可根据选项中的关键词运用寻读法定位原文，然后比对选项，运用排除法确定答案。文中第三段第一句提到这些镜子表面涂有铝，并且是塑料的，故 A 项描述是正确的。第三段第一、二句也提到这些镜子会被折叠放入太空船，太空船进入太空后会将其释放，然后这些镜子就依靠太阳能自行运

48、转。由此推断，这些镜子并不是被直接发射到太空中去的，故 B 项对镜子的描述是错误的。文中第四段最后一句提到，镜子可以永远对着地球上的同一个地方，故 C 选项的描述是正确的。文中第三段第一句提到这些镜子反射到地球上的光的范围约长 300英里，宽 200 英里。由此推断，镜子反射到地球上的太阳光的面积非常大，故 D 选项对镜子的描述是正确的。综上所述，B 为正确答案。(3).The reflected light should sweep slowly along the surface of the earth because the mirrors _.（分数：5.00）A.would be

49、operated by solar-powered enginesB.would orbit thousands of miles high to catch the sun“s lightC.could move around the earth at the same speed as the earth turns on its axisD.could be made to adjust their angles 解析：解析 细节题。题干意为“被反射的光能缓慢地扫过地球的表面是因为镜子能够”。根据题干中sweep slowly along the surface of the earth 定位至第六段第一句，科学家称这些由电脑控制的镜子也能够缓慢地倾斜，这样，被反射的光就能缓慢地扫过地球的表面。D 选项(能被调整角度)与其意思一致，故 D 为正确答案。(4).The purpose for slowly tilting the mirrors in space is to _.（分数：5.00）A.confuse a