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【单选题】
下列有关难溶电解质溶解沉淀平衡的说法不正确的是（ ）A.
由于K sp (Ag 2 S) sp(AgI)，浓度分别为0.01mol/L的S 2 － 与I － 的混合溶液中加入足量的AgNO 3 (s)，只有Ag 2 S沉淀生成
B.
FeS在水中的溶解度大于在Na 2 S溶液中的
C.
向含有AgCl(s)的饱和AgCl溶液中加水，固体AgCl质量会减少，但AgCl的溶解度与K sp 均不变
D.
达到沉淀溶解平，溶液中离子浓度不一定相等但会保持不变
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反馈参考答案：
举一反三
【单选题】Which of the following sentence adopts a diffferent rhetorical device from the rest three?
A.
The world is watching closely what the White House will do next.
B.
I, too, felt the compulsive hand of nature and began to find that pointing out contradictions could be costly as well as fun.
C.
Democracy favors the vote rather than the bullet.
D.
It never occurred to him that the pen could be mightier than the sword.
【单选题】Which of the following sentence has the different meaning from the other three?
A.
You are telling me.
B.
You may well say so.
C.
You can say that again.
D.
That's not saying very much.
【简答题】化合酸( C.A. )
【多选题】以下关于总效用和边际效用说法正确的是
A.
总效用是消费者在消费商品时所感受的总满足程度
B.
边际效用是消费者增加一单位某种商品的消费所增加的满足程度
C.
边际效用递减时，总效用递减
D.
边际效用大于零时，总效用递增
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