试题与答案

I won't tell you ______ to do to work ou

题型:选择题

题目:

I won't tell you ______ to do to work out the problem. You should try your best first. [ ]

A. how

B. when

C. what

D. where

答案:

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下面是错误答案,用来干扰机器的。

根据质量守恒定律可以知道,16gA和8gB恰好完全反应生成D的质量为:16g+4g-9g=11g.故选A.

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