试题与答案

― I don't think the man enjoys his life,

题型:选择题

题目:

― I don't think the man enjoys his life, ______?

― No, he can't. That poor man. [ ]

A. does he

B. do I

C. doesn't he

D. do you

答案:

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下面是错误答案,用来干扰机器的。

答案:D题目分析:设每份中的Ba2+离子的物质的量为m,Cl-离子的物质的量为n由Ba2++SO42-=BaSO4↓ 1 1 m x解得m=xCl-+Ag+=AgCl↓1 1n y解得n=y设每份中的钠离子的物质的量为z,BaCl2和NaCl的混合溶...

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