16.The imposition of quotas limiting imported steel will not help the big American steel mills. In fact, the quotas will help “mini-mills” flourish in the United States. Those small domestic mills will take more business from the big American steel mills than would have been taken by the foreign steel mills in the absence of quotas.Which of the following, if true, would cast the most serious doubt on the claim made in the last sentence above?
（A） Quality rather than price is a major factor in determining the type of steel to be used for a particular application.
（B） Foreign steel mills have long produced grades of steel comparable in quality to the steel produced by the big American mills.
（C） American quotas on imported goods have often induced other countries to impose similar quotas on American goods.
（D） Domestic “mini-mills” consistently produce better grades of steel than do the big American mills.
（E） Domestic “mini-mills” produce low-volume, specialized types of steels that are not produced by the big American steel mills.
17.Correctly measuring the productivity of service workers is complex. Consider, for example, postal workers: they are often said to be more productive if more letters are delivered per postal worker. But is this really true? What if more letters are lost or delayed per worker at the same time that more are delivered?The objection implied above to the productivity measure described is based on doubts about the truth of which of the following statements?
（A） Postal workers are representative of service workers in general.
（B） The delivery of letters is the primary activity of the postal service.
（C） Productivity should be ascribed to categories of workers, not to individuals.
（D） The quality of services rendered can appropriately be ignored in computing productivity.
（E） The number of letters delivered is relevant to measuring the productivity of postal workers.
18.Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers that exhibit different building and decorative styles, researchers have concluded that the bowerbirds' building styles are a culturally acquired, rather than a genetically transmitted, trait.Which of the following, if true, would most strengthen the conclusion drawn by the researchers?
（A） There are more common characteristics than there are differences among the bower-building styles of the local bowerbird population that has been studied most extensively.
（B） Young male bowerbirds are inept at bower-building and apparently spend years watching their elders before becoming accomplished in the local bower style.
（C） The bowers of one species of bowerbird lack the towers and ornamentation characteristic of the bowers of most other species of bowerbird.
（D） Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.
（E） It is well known that the song dialects of some songbirds are learned rather than transmitted genetically.
19.A greater number of newspapers are sold in Town S than in Town T. Therefore, the citizens of Town S are better informed about major world events than are the citizens of Town T.Each of the following, if true, weakens the conclusion above EXCEPT:
（A） Town S has a larger population than Town T.
（B） Most citizens of Town T work in Town S and buy their newspapers there.
（C） The average citizen of Town S spends less time reading newspapers than does the average citizen of Town T.
（D） A weekly newspaper restricted to the coverage of local events is published in Town S.
（E） The average newsstand price of newspapers sold in Town S is lower than the average price of newspapers sold in Town T.
20.One analyst predicts that Hong Kong can retain its capitalist ways after it becomes part of mainland China in 1997 as long as a capitalist Hong Kong is useful to China; that a capitalist Hong Kong will be useful to China as long as Hong Kong is prosperous; and that Hong Kong will remain prosperous as long as it retains its capitalist ways.If the predictions above are correct, which of the following further predictions can logically be derived from them?
（A） If Hong Kong fails to stay prosperous, it will no longer remain part of mainland China.
（B） If Hong Kong retains its capitalist ways until 1997, it will be allowed to do so afterward.
（C） If there is a world economic crisis after 1997, it will not adversely affect the economy of Hong Kong.
（D） Hong Kong will be prosperous after 1997.
（E） The citizens of Hong Kong will have no restrictions placed on them by the government of mainland China.
参考答案:
1. C 2.C 3.E 4.C 5.A
6. D 7.D 8.C 9.A 10. A
11.D 12. A 13.D 14.B 15.E
16.E 17.D 18.B 19.E 20. B