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【简答题】
某pH=9．0的溶液中含有0．050mol.L-1CrO42-和0．010mol.L-1Cl-，当向其中滴加AgNOa3溶液时，哪一种沉淀先析出?当第二种离子开始生成沉淀时，第一种离子的浓度还有多大?[Ksp(AgCl)=1．77×10-10，Ksp(Ag2CrO4)=1．12×10-12，H2CrO4的离解常数Ka1=1．8×10-1，Ks2=3．2×10-7。忽略HCrO4-转化为Cr2O72-的量]
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【单选题】—Which dress is____ ,the red one or the blue one? —The blue one, l think. [ ]
A.
expensive
B.
much expensive
C.
more expensive
D.
most expensive
【单选题】Which lesson is _______, this one or that one?
A.
difficult
B.
much difficult
C.
more difficult
D.
the most difficult
【单选题】—Which car is _______, the yellow one or the red one? —The red one, I think.
A.
expensive
B.
much expensive
C.
more expensive
D.
most expensive
【简答题】Which of the following is NOT mentioned as one of the ways children can deal with money?_____ A: Donating their money to the poor. B: Buying a desirable new cell phone. C: Setting costly goals for the...
【单选题】Which one of the following is NOT mentioned as human's sufferings in life?
A.
Too much tiring work to do.
B.
Too much worries to put them under stress.
C.
Too little interesting things going on.
D.
To regret after we loss something or someone.
【单选题】The text is ______ easier and ________ interesting than that one.
A.
more, much
B.
much, more
C.
more, more
D.
much, much
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