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【题目】Water, regulates body temperature,delivers oxygen all over the body,and assists in digestion,makes up more than 60% of the human body.

A. it B. which

C. what D. as

【答案】B

【解析】句意为:水占人体比重的百分之六十以上。它控制着人的体温,向全身输送氧气,并且帮助消化。分析句子结构可知,空处引导非限制性定语从句,且从句缺少主语,所以用关系代词,根据先行词是water可知选B。

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