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【单选题】
碘化钾可在[Ag(NH3)2]NO3溶液中沉淀出AgI，但是不能从K[Ag(CN)2]溶液中沉淀出AgI，这两种溶液都能和H2S作用并析出Ag2S，以上事实说明什么?( )A.
AgI的溶解度小于Ag2S的溶解度;
B.
[Ag(NH3)2]+ 的解离常数小于[Ag(CN)2]-;
C.
S2-比I-有更高的负电荷;
D.
Ag2S的溶解度要大大低于AgI的溶解度，S2-会使两配合物发生解离。
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【单选题】______I went abroad for further study.
A.
At times
B.
At a time
C.
At one time
D.
At any time
【单选题】There ( ) many great changes in my hometown since I went abroad.
A.
were
B.
have been
C.
have
D.
are
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A.
增大箍筋直径和减小箍筋间距
B.
提高箍筋的抗拉强度设计值
C.
加配弯起钢筋
D.
增大截面尺寸或提高混凝土强度等级
【单选题】Business will still be _________ unless your price proves attractive in the future.
A.
easy
B.
easier
C.
difficult
D.
difficulty
【单选题】“In no condition you are a Chinese.” Dad told me before I went abroad.
A.
you should forget
B.
forget you
C.
shouldn’t you forget
D.
should you forget
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【简答题】When you are starting a small business, you should write a business plan. Writing a business plan is the most important 1_______. This is how people will think about your business. When you 2_________...
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