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That's the time ( )the clock.

分类: 作业答案 • 2021-12-30 13:01:03

问题描述：

That's the time ( )the clock.
A.on B.in C.under

答

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FeS饱和溶液中c(Fe2+)c(S2与c（H+）*c(OH-)=Kw类似,FeS饱和溶液中c（Fe2+)*c(S2-)=Ksp.常温下Ksp=8.1*10-17.理论上FeS的溶解度为?而事实上其浓度远大于这个数值,其原因可能是?
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The clock struck nine. Isn’t it the time that children _________ to bed?

That's the time ( )the clock.

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