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there's a bridge [ ] the river.

分类: 作业答案 • 2022-01-09 18:05:33

问题描述：

there's a bridge [ ] the river.
A;above
B;near
C;acroos
D;through
必须有理由

答

A
above 指在什么什么的上方

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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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there's a bridge [ ] the river.

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