试题与答案

We are short ______ energy and water ___

题型:选择题

题目:

We are short ______ energy and water ______ the overpopulation.

A. of, because
B. of, because of
C. in, because
D. in, because of

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:空气中体积分数约占21%的气体是氧气,故答案选择B

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