大学四级-68及答案解析.doc

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1、大学四级-68 及答案解析(总分：713.00，做题时间：90 分钟)一、BPart Writing(总题数：1，分数：106.00)1.近几年越来越多的大学正在实性教育； 2加强大学生性教育的必要性； 3你认为大学生应该怎么样做？（分数：106.00）_二、BPart Reading (总题数：1，分数：70.00)Directions: In this part, you will have 15 minutes to read the passages quickly and answer the questions on Answer Sheet 1.For questions 1-7

2、, choose the best answer from the four choices marked A), B), C) and D). For questions 8-10, complete the sentences with the information given in the passage.SpaceOur Future in Space: It Has Already Begun!We are all space travelers. But weve stayed close to home until now. One day, we may leave our

3、“mother ship“ Earth to make our home among the stars.A giant, spherical “spaceship“, about 8,000 miles in diameter, is speeding through the solar system right now. It is cruising at an incredible 66,600 miles per hour.Its not a giant, Star Wars mother ship. Its spaceship Earth, the home of over four

4、 billion people. This water coated spaceship has been traveling through the universe for about five billion years. Only within the past 25 years, however, have some of its passengers broken free of Earths gravity.But 25 years from now, many people, including you, might live in an orbiting space stat

5、ion 200 miles above the Earth.Space CitiesScientists have already designed special space factories. These factories will take advantage of the absence of gravity ( zero gravity) to produce everything from life-saving drugs to perfect ball bearings.Other scientists have designed space colonies, compl

6、ete with farms, schools, and artificial day and night. Hundreds, or even thousands, of people will live, work, play-even go to school, far above the Earth.Our conquest of space, of course, has already begun. We have explored part of the Moon, sent robot spaceships onto the surface of Venus and Mars,

7、 and aimed space probes past the planets of Jupiter and Saturn.Last June, one robot ship, Pioneer 10, left our solar system forever. And astronauts from both the Soviet Union and the United States have lived in space stations.The conquest of space, without question, is one of the greatest adventures

8、 human beings have ever set out on. But it may be more than a great adventure. Some scientists think the conquest of space may be a necessity for survival of the human species.We are tearing up more and more of the Earth to get raw materials for industry. And we are polluting the air and water as we

9、 manufacture products that we need or want. Almost everything that seems to make our lives more comfortable, and from electricity to pesticides, uses up or alters a piece of our planets natural environment.Why Go into Space?Yet our solar system is full of resources. The moon is chockfull of valuable

10、 metals. So are the asteroids, the small, rocky, planet-like bodies orbiting the sun most of them between Mars and Jupiter. These metals, if we can get them, could be used to build factories and space stations. Also, in space, there is no atmosphere to filter out the suns energy. There is plenty of

11、solar energy to be turned into electricity for manufacturing, for creating comfortable living conditions.Getting away from Earth has other advantages, too. Modern industry uses many kinds of metal alloys (mixtures of metal that are better for certain purposes than pure metals). Yet some metal alloys

12、 either cant be made or are very expensive to make on Earth because of gravity. For instance, certain metals dont mix well on Earth. But in zero gravity, molten (hot, liquid) metals mix more evenly. This is because there is no gravity to pull the heavier metals down, while the lighter ones float on

13、top.From space, too, we can look down on the Earth and study the atmosphere, its weather, and the effects of air pollution.And because there is no strong gravity to break free from, our future homes away from Earth will be convenient starting points for travel to distant planets.But, while going int

14、o space might solve some problems, outer space can also be a dangerous place. For example, in outer space, we have to protect ourselves from the dangers of ultraviolet light and cosmic rays. Ultraviolet light from the sun can give us bad sunburns right here on Earth. Yet, Earths atmosphere screens o

15、ut most of that harmful radiation. Cosmic rays are tiny high energy particles from outer space. Again, the Earth shields us from most of them.At Home in Space?But in space, without special protection, we would be exposed to much stronger radiation from ultraviolet light and cosmic rays. Also, in the

16、 zero gravity of outer space, our bones will lose calcium and become weaker. This will be more of a problem the longer people stay out in space. Doctors are looking for a way to keep our bones from losing calcium in outer space. And a small spaceship just might “drive you batty“ after a while. But e

17、ven on a short trip in outer space, you might not feel as well as youd like to. Space travel could make you seasick!Yet, these risks wont keep people from going into space. Eventually, an Earth-like-environment will be built in space. And they will be populated by people with many different interest

18、s: medicine, construction, farming, teaching, mining, and so on.The next hundred years will be filled with other worldly adventures, exciting scientific discoveries, and danger, as humans leave Earth-perhaps forever.Aging in SpaceSuppose a space traveler is moving at a velocity of 186,200 miles per

19、second. For every hour that passes for him, 30 hours pass on Earth. If he travels for a year in this fashion (having accelerated instantaneously) and then turns around and comes back at this speed (having turned around instantaneously), he will find that while he has seemed to himself to have travel

20、ed two years, the men on Earth would claim he had been absent for 30 years.Suppose the space traveler had left at the age of 30, leaving behind a twin brother also aged 30. When he returned he would be 32, but his stay-at-home twin brother would be 60. That is why the “clock paradox“, is sometimes c

21、alled the “twin paradox“.Of course it takes quite a long while to accelerate to a high speed, and a long while to make a turn and head back again, so conditions arent quite as clear cut as just described.（分数：70.00）(1).The giant, spherical spaceship mentioned in the passage is _. A. the outer space B

22、. a man-made spaceship C. the planet Earth D. the Star Wars mother-ship（分数：7.00）A.B.C.D.(2).Some persons have traveled into outer space after conquering _ within the past 25 years. A. the universe B. Earths gravity C. the earth D. outer space（分数：7.00）A.B.C.D.(3).We have explored or sent robot spaces

23、hips to the following space except _. A. the moon B. Venus C. Jupiter D. Mars（分数：7.00）A.B.C.D.(4).Why is the conquest of space more than a great adventure? A. Because it is full of challenges for human beings. B. Because it may be necessary for human beings to survive. C. Because it is the greatest

24、adventure in human history. D. Because it is more exciting than any other adventures.（分数：7.00）A.B.C.D.(5).The moon and the asteroids are alike with respect to their _. A. size and moving ways B. comfortable living conditions C. rich and valuable metals D. solar energy（分数：7.00）A.B.C.D.(6).Why cant ul

25、traviolet light scorch our skin on Earth as seriously as it does in space places? A. Because the Earths atmosphere can make ultraviolet light less harmful. B. Because ultraviolet cant reach the Earth at all. C. Because the Earth is far away from those planets radiating ultraviolet light. D. Because

26、other space places is near from those planets radiating ultraviolet light.（分数：7.00）A.B.C.D.(7).In spite of many risks, scientists will finally build _ in space suitable for humans to live. A. an environment without ultraviolet light B. a lot of homes C. an Earth-like environment D. an environment wi

27、th atmosphere（分数：7.00）A.B.C.D.(8).The reason some “metal alloys cant be made on Earth is that the heavier metals _. together with the lighter ones.（分数：7.00）填空项 1:_(9).In space, there is no atmosphere to filter out the suns energy. There is plenty of solar energy to be turned into _, for creating com

28、fortable living conditions.（分数：7.00）填空项 1:_(10).According to the author, _ will be caused to a man in gravity-free space.（分数：7.00）填空项 1:_三、BPart Listenin(总题数：0，分数：0.00)四、BSection A/B(总题数：4，分数：105.00)Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end

29、 of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer.

30、 Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.（分数：35.00）(1). A. Monitoring the guests. B. Staying in Room 501 during the show. C. Entering two minutes earlier. D. Getting the guests ready.（分数：7.00）A.B.C.D.(2). A. To tell her what she should do. B. To not

31、ice what is dirty. C. To be responsible for her. D. To put things in position.（分数：7.00）A.B.C.D.(3). A. Estimate the worth of the company. B. Stay in the company for 5 more years. C. Give up his plan of living comfortably. D. Quit the job for a better-paid one.（分数：7.00）A.B.C.D.(4). A. He broke his bo

32、ne. B. A needle injured him. C. He is in great pain. D. The woman will hurt him.（分数：7.00）A.B.C.D.(5). A. They go on to look for other cure. B. The man owes the woman five pounds. C. The woman loses due to the mans misunderstanding. D. They failed in stopping the hiccups.（分数：7.00）A.B.C.D.（分数：21.00）(1

33、). A. 48p. B. 1.14. C. 55p. D. 1.44.（分数：7.00）A.B.C.D.(2). A. To go to Cairo together with a friend. B. To meet her friend on the way back from Cairo. C. To join a friend and go on to Sydney together. D. To stop over with a friend to and from Sydney.（分数：7.00）A.B.C.D.(3). A. To go to the end of the co

34、rridor and turn right. B. To go through the main door and turn right. C. To go to the last door on the left of the corridor. D. To go to the last door on the right of the corridor.（分数：7.00）A.B.C.D.Questions 19 to 21 are based on the conversation you have just heard. （分数：21.00）(1). A. They want to bu

35、y a house of their own. B. They want their parents to lend some money to them. C. They want to sell their house they are living in. D. They want to have a baby.（分数：7.00）A.B.C.D.(2). A. Because its too crowded to live together. B. Because the parents always interfere with their personal life. C. Beca

36、use they will have a baby. D. Because the house is too far away from their working places.（分数：7.00）A.B.C.D.(3). A. He is considerate. B. He is aggressive. C. He is self-reliant. D. He is very rich.（分数：7.00）A.B.C.D.Questions 22 to 25 are based on the conversation you have just heard. （分数：28.00）(1). A

37、. In the evening. B. In the afternoon. C. On Sunday morning. D. In the morning.（分数：7.00）A.B.C.D.(2). A. She is new to the place. B. She is a foreigner. C. She cant provide her new address. D. She needs to borrow some books.（分数：7.00）A.B.C.D.(3). A. Two months ago. B. Some weeks ago. C. Several days a

38、go. D. Two weeks ago.（分数：7.00）A.B.C.D.(4). A. Her driving license. B. Her husbands license. C. A letter from one of her friends. D. Her passport.（分数：7.00）A.B.C.D.五、BSection B/B(总题数：3，分数：70.00)Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some

39、question. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C), and D). Then mark the corresponding letter on the Answer Sheet 2 with a single line through the center.Passage OneQuestions 26 to

40、 28 are based on the passage you have just heard. （分数：21.00）(1). A. The importance of advertisement. B. The societys great need of advertisement. C. The origin of advertisement. D. The prosperity of advertisement.（分数：7.00）A.B.C.D.(2). A. The local governments. B. Their owners families. C. Advertisem

41、ents. D. The audience.（分数：7.00）A.B.C.D.(3). A. Advertising is personal. B. Advertisements are convincing. C. Advertisements are unreliable. D. Advertisements are misleading.（分数：7.00）A.B.C.D.Passage TwoQuestions 29 to 31 are based on the passage you have just heard. （分数：21.00）(1). A. Different kinds

42、of crimes. B. Increasingly high crime rate in the U. S. C. Seasonal changes in the natural environment. D. The relations between changes in the season and crime patterns.（分数：7.00）A.B.C.D.(2). A. February. B. May. C. July. D. August.（分数：7.00）A.B.C.D.(3). A. Few people get married in June. B. Most peo

43、ple read serious books in summer. C. More people have mental problems in June than in other months. D. One is most likely to make the best performance on examinations in summer.（分数：7.00）A.B.C.D.Passage ThreeQuestions 32 to 35 are based on the passage you have just heard. （分数：28.00）(1). A. The good p

44、oints of the federal system. B. How power is divided under the federal system. C. The difference between the central government and the states. D. The different functions of the central government and the states.（分数：7.00）A.B.C.D.(2). A. Printing money. B. Limiting state taxes. C. Making treaties wit

45、h foreign countries. D. Passing laws affecting trade between the states.（分数：7.00）A.B.C.D.(3). A. All the states have respective powers. B. The central government and the states share the same powers. C. The powers of the country are fairly divided up between states. D. It is the Constitution that sp

46、ecifies the power for the central government and the states.（分数：7.00）A.B.C.D.(4). A. The central government cannot be too powerful. B. Bigger states have more power than smaller ones. C. The central government can put a limit on state taxes. D. The states and the central government have the same pow

47、ers.（分数：7.00）A.B.C.D.六、BSection C/B(总题数：1，分数：77.00)Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks num

48、bered from 36 to 43 with the exact words you have heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.Animals, plants, and other species become U U 1