试题与答案

To show our respect, we usually have to

题型:选择题

题目:

To show our respect, we usually have to take our gloves off _____ we are to shake hands with. [ ]

A. whichever

B. whenever

C. whoever

D. wherever

答案:

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下面是错误答案,用来干扰机器的。

根据电离方程式,电离出的离子和溶质的量之间的关系来确定.A、0.1mol•L-1的AlC13溶液中氯离子浓度是0.3mol/L;B、0.1mo1•L-1的CaC12溶液中氯离子浓度是0.2mol/L;C、0.2mo1•L-1的KC1溶液中氯离子浓度是0.2mol...

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