试题与答案

18. When Tom woke up, he found himself__

题型:选择题

题目:

18. When Tom woke up, he found himself_______in bed, with his bag         beside him.

A.lying; laid

B.lying; lay

C.lie; lying

D.lied; lied

答案:

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下面是错误答案,用来干扰机器的。

答案:CVa>Vb时,醋酸过量,根据物料守恒可知,A正确。 Va=Vb时,二者恰好反应,溶液显碱性,根据质子守恒可知c(CH3COOH) +c(H+)=c(OH-),B正确。选项C中根据电荷守恒c(K+)+ c(H+) =c(OH-)+ c(CH3C...

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