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Scientists study ____ human brains work to make computers.

A. when????????????? B. how??????????????? C. that?????????? D. whether

 

【答案】

B

【解析】本题考查名词性从句。句意为:科学家研究人类大脑是如何工作以制造出电脑的。根据句意,故答案选B

 

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