考博英语模拟试题 Be"D0=<
Part I Listening Comprehension(15 points) (略) F>E'/r*
Part II Reading Comprehension (40 % ) 4AB7 uw
Directions: There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each or them there are four choices marked A, B, C and D. You should decide on the best choice and then mark the corresponding letter on the Answer Sheet. zbZ0BD7e
Questions 16 to 20 are based on the following passage: P4"_qxAW
Eight times within the past million years, something in the Earth's climatic equation has changed, allowing snow in the mountains and the northern latitudes to accumulate from one season to the next instead of melting away. Each time, the enormous ice sheets resulting from this continual buildup lasted tens of thousands of years until the end of each particular glacial cycle brought a warmer climate. Scientists speculated that these glacial cycles were ultimately driven by astronomical factor: slow, cyclic changes in the eccentricity of the Earth's orbit and in the tilt and orientation of its spin axis. But up until around 30 years ago, the lack of an independent record of ice-age timing made the hypothesis untreatable. y
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Then in the early 1950's Emirian produced the first complete record of the waxwings and awnings of first glaciations. It came from a seemingly odd place, the seafloor. Single-cell marine organisms called "foraminifera'' house themselves in shells made from calcium carbonate. When the foraminifera die, sink to the bottom, and become part of seafloor sediments, the carbonate of their shells preserves certain characteristics of the seawater they inhabited. In particular, the ratio of a heavy isotope of oxygen (oxygen- 18) to ordinary oxygen (oxygen - 16) in the carbonate preserves the ratio of the two oxygen’s in water molecules. %,$/wh)<V
It is now understood that the ratio of oxygen isotopes reflects the proportion of the world's water locked up in glaciers and ice sheets. A kind of meteorological distillation accounts for the link. Water molecules containing the heavier isotope tend to condense and fall as precipitation slightly sooner than molecules containing the lighter isotope. Hence, as water vapor evaporated from warm oceans moves away from its source, its oxygen - 18 returns more quickly to the oceans than does its oxygen - 16. What falls as snow on distant ice sheets and mountain glaciers is relatively depleted of oxygen -18. As the oxygen -18 -poor ice builds up, the oceans become relatively enriched in the isotope. The larger the ice sheets grow, the higher the proportion of oxygen - 18 becomes in seawater -- and hence in the sediments #p}I 84Q
Analyzing cores drilled from seafloor sediments, Mililani found that the isotopic ratio rose and fell in rough accord with the Earth's astronomical cycles. Since that pioneering observation, oxygen isotope measurements have been made on hundreds of cores. The combined record enables scientists to show that the record contains the very periodicities as the orbital processes. Over the past 800, 000 years, the global ice volume peaked every 100,000 years, matching the period of the orbital eccentricity variation. In addition, "wrinkles" superposed on each cycle -- small decreases or surges in ice volume -- have come at intervals of roughly 23, 000 and 41,000 years, in keeping with the precession and tilt frequencies of the Earth's spin axis. ,TaaX I
16. In opening paragraph, the author introduces his topic by________ "WR)a`$UR
A. unfolding a phenomenon. B. posing a contrast. azKbGS/X
C. refuting a speculation. D. testifying a hypothesis. j_c0oclSz
17. The expression "waxings and wanings" (Paragraph 2) most probably means ________ wmdv
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A. regularities and eccentricities. B. vaporizations and sediments. J4!Om&\@
C. variants and constants. D. maximizations an minimizations. XzGPBi
18. As pointed out in the text, the ratio of oxygen - 18 to oxygen - 16 in seafloor sediments and that of these isotopes locked in glaciers and ice-sheets are________ `=^;q6f
A. irrelevant. B. correlated. C. corresponding. D. identical. o
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19. Single-cell marine organisms referred to as "foraminifera" as mentioned in the text might serve as_________ p*E_Po
A. a proof against the existence of oxygen. WgPpW!`
B. a testimony to sediment formation processes. j4Pp
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C. a valid record justifying glacial periodic cycles. n Bv|5$w:
D. an indicator of the ratio of the two oxygen’s. 833KU_ N
20. What can we safely infer from the text? >7.
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A. Many a phenomenon might be caused by astronomical factors. w%;Z`Xn&u
B. Any hypothesis should be abandoned unless supported by solid records. lx,^Y647
C. Glaciers are the records keeping Earth's astronomical cycles. fl>*>)6pm
D. Oxygen isotopes are evenly distributed throughout the earth surface. 3OTq
Questions 21 to 25 are based on the following passage: jrT5Rw_}q
If you smoke and you still don't believe that there's a definite between smoking and bronchial troubles, heart disease and lung cancer, then you are certainly deceiving yourself. No one will accuse you of hypocrisy. Let us just say that you are suffering from a bad case of wishful thinking. This needn't make you too uncomfortable because you are in good company. Whenever the subject of smoking and health is raised, the governments of most countries hear no evil, see no evil and smell no evil. Admittedly, a few governments have taken timid measures. In Britain, for example, cigarette advertising has been banned on television. The conscience of the nation is appeased, while the population continues to puff its way to smoky, cancerous death. +O>1Ed
You don't have to look very far to find out why the official reactions to medical findings have been so lukewarm. The answer is simply money. Tobacco is a wonderful commodity to tax. It's almost like a tax on our daily bread. In tax revenue alone, the government of Britain collects enough from smokers to pay for its entire educational facilities. So while the authorities point out ever so discreetly that smoking may, conceivably, be harmful, it doesn't do to shout too loudly about it. Ub(zwR;
This is surely the most short-sighted policy you could imagine. While money is eagerly collected in vast sums with one hand, it is paid out in increasingly vaster sums with the other. Enormous amounts are spent on cancer research and on efforts to cure people suffering from the disease. Countless valuable lives are lost. In the long run, there is no doubt that everybody would be much better-off if smoking were banned altogether. MFO}E!9`q
Of course, we are not ready for such drastic action. But if the governments of the world were honestly concerned about the welfare of their peoples, you'd think they'd conduct aggressive antismoking campaigns. Far from it! The tobacco industry is allowed to spend staggering sums on advertising. Its advertising is as insidious as it is dishonest. We are never shown pictures of real smokers coughing up their lungs early in the morning. That would never do. The advertisements always depict virile, clean-shaven young men. They suggest it is manly to smoke, even positively healthy! Smoking is associated with the great open-air life, with beautiful girls, true love and togetherness. What utter nonsense! .n1]Yk;,1
For a start, governments, could begin by banning all cigarette and tobacco advertising and should then conduct anti-smoking advertising campaigns of their own. Smoking should be banned in all public places like theatres, cinemas and restaurants. Great efforts should be made to inform young people especially of the dire consequences of taking up the habit. A horrific warning -- say, a picture of a death's head -- should be included in every packet of cigarettes that is sold. As individuals we are certainly weak, but if governments acted honestly and courageously, they could protect us from ourselves. .PBma/w
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21. The best title of the text may be _______ qV0C2jZ2
A. give up the habit of smoking immediately. ~jMdM~}
B. word governments should conduct serious campaigns against smoking. $$8xdv#
C. go on with anti-smoking lobby vigorously. 0Pw?@uV
D. world governments should allocate more funds on cancer researches. *+TIF"|1
22. As pointed out in the text, governments are reluctant to exercise total ban on cigarette and tobacco advertising _____ @*jd.a`
A. in the interests of financial rewards. B. for the sake of the public's welfare. 4Sv&iQ=vh
C. without regard to tax collections. D. in anticipation of smokers lobbying. C(7uvQ
23. The word "hypocrisy" ( Paragraph 2) denotes ______ NFTEp0eP
A. dishonesty. B. predicament. C. indecision. D. intimidation. n|
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24. It can be concluded that anti-smoking campaigns should be conducted_______ fwB+f`w`
A. insidiously and discreetly. B. vividly and attractively. k6-.XW
C. aggressively and drastically. D. disinterestedly and bravely. (m|w&oA/
25. The author is most critical of________ =\H.C@r
A. anti-smoking lobbyists. B. tobacco advertisers. (5S(CYls
C. world governments. D. tax collectors. 1L.H"
Questions 26 to 30 are based on the following passage: o(5Xj$Z
It is the staff of dreams and nightmares. Where Tony Blair's attempts to make Britain love the Euro have fallen on deaf ears, its incarnation as notes and coins will succeed. These will be used not just in the Euro area but in Britain. As the British become accustomed to the Euro as a cash currency, they will warm to it paving the way for a yes note in a referendum. J8w#J
The idea of Euro creep appeals to both sides of the Euro argument. According to the pros, as Britons become familiar with the Euro, membership will start to look inevitable, so those in favor are bound to win. According to the antis, as Britons become familiar with the Euro, membership will start to look inevitable, so those opposed must mobilize for the fight. 5]n5nqz
Dream or nightmare, Euro creep envisages the single currency worming its way first into the British economy and then into the affections of voters. British tourists will come back from their European holidays laden with Euros, which they will spend not just at airports but in high street shops. So, too, will foreign visitors. As the Earn becomes a parallel currency, those who make up the current two-o-one majority will change their minds. From there, it will be a short step to decide to dispense with the pound. sS#Lnj^`%
Nell Kinnock, a European commissioner and former leader of the Labor Party, predicts that the Euro will soon become Britain's second currency. Hans Eichel, the German finance minister, also says that it will become a parallel currency in countries like Switzerland and Britain. Peter Hain, the European minister who is acting as a cheerleader for membership, says the Euro will become "a practical day-to-day reality and that will enable people to make a sensible decision about it". As many as a third of Britain's biggest retailers, such as Marks and Spencer, have said they will take Euros in some of their shops. BP has also announced that it will accept Euros at some of its garages. v7
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But there is less to this than meet the eye. British tourists can now withdraw money from cash point from European holiday destinations, so they are less likely than in the past to end up with excess foreign money. Even if they do, they generally get rid of it at the end of their holidays, says David South well, a spokesman for the British Retail Consortium (BRC). \9*wo9cV
26. According to the writer, once the British get used to the Euro,__ {~7VA
A. there will be no obstacle for it to be a currency in Britain. @Q~Oc_z
B. it will take the place of pound in whatever aspects in Britain. & %4x
C. the British will accept it as a cash currency gradually. w]Z*"B&h
D. it will become a symbol of reunification for European countries. g2p/#\D\J
27. The writer seems_________ `PK1zSr
A. to be over-enthusiastic about the success of the Euro. b#cXn4<