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【单选题】
已知HCN的Ka=1.0×10-10,则CN-的Kb为A.
2.0×10-5
B.
5.0×10-10
C.
5.0×10-4
D.
5.0×10-24
E.
1.0×10-4
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【单选题】What does Lisa Lynch think about the Labor Department' s report?
A.
It should be revised.
B.
It is too long.
C.
It covers a broad area.
D.
It is positive.
【单选题】What did the boy think about the girl?
A.
She never studied hard.
B.
She studied very well.
C.
She couldn't pass the exam.
【单选题】What did the boy think about the gift?
A.
She never studied hard.
B.
She studied very well.
C.
She couldn't pass the exam.
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