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  3. (北京航空航天大学2015年试题) During recent years we have heard much about "race": how this race does certain things and that race believ

(北京航空航天大学2015年试题) During recent years we have heard much about "race": how this race does certain things and that race believ

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问题    (北京航空航天大学2015年试题)
   During recent years we have heard much about "race": how this race does certain things and that race believes certain things and so on. Yet, the【C1】______phenomenon of race consists of a few surface indications.
   We judge race usually【C2】______the coloring of the skin: a white race, a brown race, a yellow race and a black race. But【C3】______you were to remove the skin you could not【C4】______anything about the race to which the individual belongs. There is【C5】______in physical structure, the brain or the internal organs to【C6】______a difference.
   There are four types of blood.【C7】______types are found in every race, and no type is distinct to any race. Human brains are the【C8】______. No scientists could examine a brain and tell you the race to which the individual belongs. Brains will【C9】______in size, but this occurs within every race.【C10】______does size have anything to do with intelligence. The largest brain【C11】______examined belonged to a person of weak【C12】______On the other hand, some of our most distinguished people have had【C13】______brains.
   Mental tests which are reasonably【C14】______show no differences in intelligence between races. High and low test results both can be recorded by different members of any race.【C15】______equal educational advantages, there will be no difference in average standings, either on account of race or geographical location.
   Individuals of every race【C16】______civilization to go backward or forward. Training and education can change the response of a group of people【C17】______enable them to behave in a (n) 【C18】______way.
   The behavior and ideals of people change according to circumstances, but they can always go back or go on to something new【C19】______is better and higher than anything【C20】______the past.
【C9】
选项 A、remain
B、increase
C、decrease
D、vary
答案D
解析 空格所在句的句意为：脑的大小有所不同。vary意为“变化，不同”，故D项为正确答案。A选项remain：留下，保持；B选项increase：增加，增大；C选项decrease：减少，减小。A、B、C三项都不符合句意。
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