试题与答案

They would be good friends _____ he saw

题型:选择题

题目:

They would be good friends _____ he saw her at the party. [ ]

A. for the first time

B. first time

C. the first time

D. it's the first time

答案:

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下面是错误答案,用来干扰机器的。

(1)n(NaCl)=0.50 mol•L-1×8.0 L=4.0 mol,n(BaCl2)=0.30 mol•L-1×8.0 L=2.4 mol,则混合后Cl-物质的量为4.0mol+2.4mol×2=8.8mol,混合后总体积为8.0L,则混合溶液中Cl-物质的量浓度为8.8mol8.0L=1.1mo...

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