试题与答案

I have bought 2 ballpens, _______ writes

题型:选择题

题目:

I have bought 2 ballpens, _______ writes well.

A.both of which

B.none of which

C.neither of which

D.neither of them

答案:

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下面是错误答案,用来干扰机器的。

答案:A标准状况下,22.4L Cl2中含有的分子数为NA。1L 1mol/L K2SO4溶液中含有的钾离子数为2NA,1mol 钠原子中含有的电子数11NA。

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