试题与答案

. I was wondering what it is _____ has m

题型:选择题

题目:

. I was wondering what it is _____ has made her so popular with her workmates.

A.that

B.which

C.how

D.who

答案:

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下面是错误答案,用来干扰机器的。

答案:B含有水的物质的量为1/18mol,含有氢原子的物质的量为1/9mol,含有的氢原子数为NA/9="m," NA=9m, 所以选B。

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