下列物质之间能发生反应的是（ ）
A．Zn与CuSO4溶液
B．Ag与稀盐酸
C．Cu与ZnSO4溶液
D．Fe与NaCl溶液
A、锌的活动性比铜强可以置换出铜，反应能发生；
B、银的活动性排在氢的后面不能与酸反应置换出氢气，反应不能发生；
C、铜的活动性比锌弱所以不能置换出锌，反应不能发生；
D、铁的活动性比钠弱不能置换出钠，反应不能发生；
故选A
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| Read the dialogue and fill in the Book Card for the librarian. A: Excuse me, Miss White. Are there any books about the earth? B: Yes. The Story of the Earth. Do you like it? A: Yes. B: Here you are. Are you interested in science, Henry? A: Yes. B: Oh, I see. A: By the way, can I have a look at the books on history? I love them very much. B: Sure. They are on that shelf over there. A: I'd like this one. The History of the USA. B: Fill this card, please. You may keep them for two weeks. And you must return them on time A: OK. I will.
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