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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】______is a particular people originated from central Europe. The process is natural selection.
    This group generally does 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(an) 【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.
【C10】
选项 A、normal
B、common
C、mean
D、total
答案C
解析 本题考查词汇辨析。本题目选择形容词，在句子中充当定语，修饰后面的名词。scoring 12一15 points above the value of 100，“这个群体在智商测试中成绩最好，比100分的……分多得12分到15分。”选项A．normal正常的；B．common普通的；共同的：C．mean平均的；D．total总共的。一般来说，average表示“平均的”较常用，mean表达这个意义时比较正式。100分是个参照值，这个数字是大多数人的基本智商数值。故选C。
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