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  3. The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name.

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name.

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问题     The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is【C1】______to say it anyway. He is that【C2】______bird, a scientist who works independently【C3】______any institution. He helped popularize the idea that some diseases not【C4】______thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.
    【C5】______he, however, might tremble at the【C6】______of what he is about to do. Together with another two scientists, he is publishing a paper which not only【C7】______that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in【C8】______are a particular people originated from central Europe. The process is natural selection.
    This group generally do well in IQ test,【C9】______12-15 points above the【C10】______value of 100, and have contributed【C11】______to the intellectual and cultural life of the West, as the【C12】______of their elites, including several world-renowned scientists,【C13】______. They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts,【C14】______, have previously been thought unrelated. The former has been【C15】______to social effects, such as a strong tradition of【C16】______education. The latter was seen as a(n)【C17】______of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately【C18】______. His argument is that the unusual history of these people has【C19】______them to unique evolutionary pressures that have resulted in this【C20】______state of affairs.
【C2】
选项 A、unique
B、particular
C、special
D、rare
答案D
解析 考查固定搭配。逗号后面的句子做bird的同位语，解释Gregory Cochran是什么样的人，independently告诉我们他是个特立独行的人。Gregory Cochran打破常规，准备把这个论断说出来，像是“出头鸟”，因此选D．rare，rare birds意为“稀世珍品，旷世奇才，罕见人(物)”，符合题意。unique“独一无二的”；particular“特殊的，特别的”；special“特殊的”，均无此用法。
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