【名词&注释】
水解平衡常数(hydrolysis equilibrium constant)、酸式盐(acidic salt)
[单选题]下列各项中哪一项用pKb表示（ ）。
A. 酸的pH值
B. 酸的电离常数
C. 酸式盐的水解平衡常数的负对数
D. 碱的pH值
E. 碱的电离常数
查看答案&解析
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举一反三：
[单选题]Edward, you play so well. But I you played the piano.
A. didn’t know
B. hadn’t known
C. don’t know
D. haven’t known
[单选题]The writer decided to try the model he had chosen because
A. knew very little about it.
B. didn’t trust the shop assistant.
C. wanted to make sure the one he chose would be the best.
D. had a special interest in taking pictures of his fellow shoppers.
[单选题]
A. trusted
B. invited
C. forced
D. permitted
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