大学英语四级分类模拟题470及答案解析.doc

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1、大学英语四级分类模拟题 470及答案解析(总分：116.00，做题时间：90 分钟)一、Part Writing(总题数：1，分数：15.00)1.Directions: For this part, you are asked to write an essay based on the following chart. In your writing, you should interpret the chart, and give your comments. You should write at least 120 words but no more than 180 words.

2、（分数：15.00）_二、Part Reading Compr(总题数：0，分数：0.00)四、Passage One(总题数：1，分数：10.00)The most pressing nuclear energy issue is the disposal of nuclear waste. Even if all the reactors in existence were completely safe to operate, there would still be unsolved issue of what to do with the waste from generating

3、electricity by means of nuclear energy. Those who claim that they feel comfortable with nuclear energy are, none the less, concerned about waste disposal methods. Seven states, including California, have put the building of nuclear plants on hold until legislators are convinced that there is a safe

4、way to dispose of the radioactive waste from the plants. In the meantime, pools of liquid waste and piles of solid waste from private industry and governmental bomb production grow. Since 1962, the volume of radioactive waste produced by the nuclear power industry has amounted to about 4,300 cubic m

5、eters. By the end of the twentieth century, if production continues at the same rate, there will be 40,000 cubic meters of nuclear waste. Power plants and bomb-making are not the only sources of waste. Uranium mining and milling operations have dumped 24 million metric tons of radioactive tailing wa

6、stes at dumping sites around the nation. At places where uranium is currently milled, there is another 100 million metric tons of tailings. Uranium tailings are solid materials in the slurry (or watery mixture) of depleted ore-bearing rock, chemicals, and liquids that result from milling. Usually, t

7、he slurry is piped to holding ponds. When a uranium mill goes out of business, the ponds are left to evaporate , uncovering piles of dried tailings. Uncovered piles of tailings give off radioactive radon gas. Once in the air, the gas finds its way into the water supply and the food chain. Consequent

8、ly, many nuclear experts agree that uranium mill tailings may be more dangerous than high-level radioactive wastes from reactors and bombs.（分数：10.00）(1).It can be inferred from the passage that the most dangerous by-product of uranium mining and milling is _.（分数：2.00）A.solid mining wastesB.the slurr

9、y in which the waste is storedC.the radon gas that is emitted by the wasteD.the uranium that is recovered in the mining operations(2).The central idea of the passage is to point out potential problems regarding _（分数：2.00）A.effects of high-level radiationB.operation of nuclear power plantsC.fallout f

10、rom the explosion of unclear weaponsD.various sources of radioactive wastes(3).According to the passage, all of the following are sources of radioactive waste EXCEPT _.（分数：2.00）A.bomb productionB.nuclear fusion experimentsC.nuclear power plant operationD.uranium mining operations(4).According to the

11、 passage, the term “uranium mine tailings“ refers to _.（分数：2.00）A.the uranium that is taken from a mineB.the ponds that hold liquid radioactive wastesC.solid wastes that result from the mining of uraniumD.dangerous radon gas that escapes from uranium mines(5).The word “evaporate“ (Line 7, Para.3) me

12、ans _.（分数：2.00）A.steamB.strengthenC.flow outD.harden五、Passage Two(总题数：1，分数：71.00)People are being lured (引诱) onto Facebook with the promise of a fun, free service, without realizing they“re paying for it by giving up loads of personal information. Facebook then attempts to make money by selling thei

13、r data to advertisers that want to send targeted messages. Most Facebook users don“t realize this is happening. Even if they know what the company is up to, they still have no idea what they“re paying for Facebook, because people don“t really know what their personal data is worth. The biggest probl

14、em, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was the great thing about Facebookyou could create your own little private network. Last year, the company changed its privacy rules so that many thingsyour city, your photo, your friends“ na

15、meswere set, by default (默认), to be shared with everyone on the Internet. According to Facebook“s vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don“t share information, they have a “less satisfying experience.“ Some critics think this is mo

16、re about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they“re online connecting with their friends? The privacy issue has already landed Facebook in hot water in Wa

17、shington. In April, Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites. “I think the senator rightly communicated that we had not been clear about what the new products were and how people

18、could choose to use them or not to use them,“ Schrage admits. I suspect that whatever Facebook has done so far to invade our privacy, it“s only the beginning. Which is why I“m considering deactivating (撤销) my account. Facebook is a handy site, but I“m upset by the idea that my information is in the

19、hands of people I don“t trust. That“s too high a price to pay.（分数：71.00）(1).What do we learn about Facebook from the first paragraph?（分数：14.20）A.It is a website that sends messages to targeted users.B.It makes money by putting on advertisements.C.It provides loads of information to its users.D.It pr

20、ofits by selling its users“ personal data.(2).What does the author say about most Facebook users?（分数：14.20）A.They care very little about their personal information.B.They are reluctant to give up their personal information.C.They don“t know their personal data enriches Facebook.D.They don“t identify

21、 themselves when using the website.(3).Why does Facebook make changes to its rules according to Elliot Schrage?（分数：14.20）A.To conform to the Federal guidelines.B.To improve its users“ connectivity.C.To render better service to its users.D.To expand its scope of business.(4).What does Senator Charles

22、 Schumer advocate?（分数：14.20）A.Setting guidelines for advertising on websites.B.Formulating regulations for social-networking sites.C.Banning the sharing of users“ personal information.D.Removing ads from all social-networking sites.(5).Why does the author plan to cancel his Facebook account?（分数：14.2

23、0）A.He finds many of its users untrustworthy.B.He is upset by its frequent rule changes.C.He doesn“t want his personal data abused.D.He is dissatisfied with its current service.六、Part Translation(总题数：1，分数：20.00)2.桂林是中国著名的风景旅游城市。它位于广西东北部，面积有 2.78万平方公里，人口 500万。拥有2000多年历史的桂林还是一个历史文化名城。自 北宋 (the Norther

24、n Song Dynasty)以来，桂林就已成为广西的政治、经济及文化中心。桂林山水以山青、水秀、洞奇、石美闻名天下；桂林的交通、通讯和住宿都非常便利发达。因此每年有成千上万的国内外游客来到桂林旅游。 （分数：20.00）_大学英语四级分类模拟题 470答案解析(总分：116.00，做题时间：90 分钟)一、Part Writing(总题数：1，分数：15.00)1.Directions: For this part, you are asked to write an essay based on the following chart. In your writing, you shoul

25、d interpret the chart, and give your comments. You should write at least 120 words but no more than 180 words. （分数：15.00）_正确答案：()解析：范文 From the cartoon, we can observe that there are two people watching Peking Opera. With the actress performing vividly on the stage, the old man is watching attentive

26、ly. However, the little boy does not even cast a glance at the actress and falls asleep. Obviously, he shows no interest in Peking Opera. The cartoon reflects an interesting aspect in our daily life. However, it also reveals the gradual loss of traditional culture. What factors contribute to this ph

27、enomenon? Possible reasons could be listed as follows: many people, especially youngsters, hold that Chinese traditional culture is outdated and of little use in modern society. Perhaps, from their perspectives, traditional culture derived from the distant past can hardly adapt to the ever-changing

28、new world. Moreover, exotic cultures have also posed a great challenge to the traditional culture of China. Actually, a large body of people has been attracted by foreign cultures which feature diversity and novelty. However, no one can deny the significance of Chinese traditional culture. An indivi

29、dual or a nation showing no respect to the essence of traditional culture cannot be expected to develop. Hence, something should be done to reverse the inexorable decline in the emphasis of Chinese traditional culture二、Part Reading Compr(总题数：0，分数：0.00)四、Passage One(总题数：1，分数：10.00)The most pressing n

30、uclear energy issue is the disposal of nuclear waste. Even if all the reactors in existence were completely safe to operate, there would still be unsolved issue of what to do with the waste from generating electricity by means of nuclear energy. Those who claim that they feel comfortable with nuclea

31、r energy are, none the less, concerned about waste disposal methods. Seven states, including California, have put the building of nuclear plants on hold until legislators are convinced that there is a safe way to dispose of the radioactive waste from the plants. In the meantime, pools of liquid wast

32、e and piles of solid waste from private industry and governmental bomb production grow. Since 1962, the volume of radioactive waste produced by the nuclear power industry has amounted to about 4,300 cubic meters. By the end of the twentieth century, if production continues at the same rate, there wi

33、ll be 40,000 cubic meters of nuclear waste. Power plants and bomb-making are not the only sources of waste. Uranium mining and milling operations have dumped 24 million metric tons of radioactive tailing wastes at dumping sites around the nation. At places where uranium is currently milled, there is

34、 another 100 million metric tons of tailings. Uranium tailings are solid materials in the slurry (or watery mixture) of depleted ore-bearing rock, chemicals, and liquids that result from milling. Usually, the slurry is piped to holding ponds. When a uranium mill goes out of business, the ponds are l

35、eft to evaporate , uncovering piles of dried tailings. Uncovered piles of tailings give off radioactive radon gas. Once in the air, the gas finds its way into the water supply and the food chain. Consequently, many nuclear experts agree that uranium mill tailings may be more dangerous than high-leve

36、l radioactive wastes from reactors and bombs.（分数：10.00）(1).It can be inferred from the passage that the most dangerous by-product of uranium mining and milling is _.（分数：2.00）A.solid mining wastesB.the slurry in which the waste is storedC.the radon gas that is emitted by the waste D.the uranium that

37、is recovered in the mining operations解析：解析 推断题。选项中的内容在文中均有提及，但是从危害性上讲，选项 A、B、D 都没有直接说到它们的害处，而文中第三段讲到 Uncovered piles of tailings give off radioactive radon gas. Once in the air, the gas finds its way into the water supply and the food chain. 故可推断出这种放射性气体才是最有害的。故选项 C正确。(2).The central idea of the pas

38、sage is to point out potential problems regarding _（分数：2.00）A.effects of high-level radiationB.operation of nuclear power plantsC.fallout from the explosion of unclear weaponsD.various sources of radioactive wastes 解析：解析 主旨题。作者在短文第一句就指出了主题：The most pressing nuclear energy issue is the disposal of nu

39、clear waste. 关键词是“核废料”nuclear waste。故选项 D正确。(3).According to the passage, all of the following are sources of radioactive waste EXCEPT _.（分数：2.00）A.bomb productionB.nuclear fusion experiments C.nuclear power plant operationD.uranium mining operations解析：解析 细节题。作者在第三段提到核废料的来源有：Power plants and bomb-ma

40、king are not the only sources of waste. Uranium mining and milling operations.显然没有提到 B选项的内容，故选 B。(4).According to the passage, the term “uranium mine tailings“ refers to _.（分数：2.00）A.the uranium that is taken from a mineB.the ponds that hold liquid radioactive wastesC.solid wastes that result from t

41、he mining of uranium D.dangerous radon gas that escapes from uranium mines解析：解析 词汇题。短文第三段中间提到 Uranium tailings are solid materials in the slurry (or watery mixture) of depleted ore-bearing rock, chemicals, and liquids that result from milling. 意思是：铀废料是加工所产生的由废弃的矿岩石、化学物和液体所组成的流质混合物中的固体物质。tailings 在这里

42、指“残渣，废料”。故选项 C正确。(5).The word “evaporate“ (Line 7, Para.3) means _.（分数：2.00）A.steam B.strengthenC.flow outD.harden解析：解析 词汇题。根据上下文来推测词义。根据 the ponds are left to evaporate, uncovering piles of dried tailings可判断出由于池塘里的液体蒸发没有了，废料才露了出来。故选项 A正确。五、Passage Two(总题数：1，分数：71.00)People are being lured (引诱) onto

43、 Facebook with the promise of a fun, free service, without realizing they“re paying for it by giving up loads of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages. Most Facebook users don“t realize this is happening. E

44、ven if they know what the company is up to, they still have no idea what they“re paying for Facebook, because people don“t really know what their personal data is worth. The biggest problem, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was

45、the great thing about Facebookyou could create your own little private network. Last year, the company changed its privacy rules so that many thingsyour city, your photo, your friends“ nameswere set, by default (默认), to be shared with everyone on the Internet. According to Facebook“s vice-president

46、Elliot Schrage, the company is simply making changes to improve its service, and if people don“t share information, they have a “less satisfying experience.“ Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting

47、 them at the side of the page, totally failed. Who wants to look at ads when they“re online connecting with their friends? The privacy issue has already landed Facebook in hot water in Washington. In April, Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Fe

48、deral Trade Commission to set guidelines for social-networking sites. “I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,“ Schrage admits. I suspect that whatever Facebook has done so far to invade our privacy, it“s only the beginning. Which is why I“m considering deactivating (撤销) my account. Facebook is a handy site, but I“m upset by the idea that my information is in the hands of people I don“t trust. That“s too high a price to pay.（分数：71.00