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【单选题】
HAc-NaAc缓冲溶液pH值的计算公式为()。A.
[H+]=√KHAcC(HAc)
B.
[H+]=KHAc×C(HAc)/C(NaAc)
C.
[H+]=√Ka1Ka2
D.
[H+]=C(HAc)
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【简答题】这其实是我的荣幸。(填写h开头的单词) It's truly my ____________.
【单选题】In extending loans, one of the principles that a commercial bank persists in is ______.
A.
free from interference of local government
B.
against collateral
C.
based on sole responsibility to its profits and losses
D.
in pursuance of the law of the People's Bank of China
【判断题】Extending the show from seven to eight days means that the flow of visitors will be distributed more evenly.
A.
正确
B.
错误
【简答题】分娩24小时后，在（）内阴道发生大量出血称为晚期产后出血。
【单选题】A vessel fishing at night，with gear extending more than 150 meters horizontally outwards，will show in the direction of the gear（）.
A.
one white light
B.
two vertical white lights
C.
one yellow light
D.
two vertical yellow lights
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