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【单选题】
分别用以下四组物质比较锌和铜的金属活动性：①Zn、Cu、稀硫酸；②Zn、Cu、MgSO 4 溶液；③Zn、CuSO 4 溶液；④Cu、ZnSO 4 溶液。仅用组内物质不能直接达到目的的是A.
①
B.
②
C.
③
D.
④
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举一反三
【单选题】听力原文：Hello, Frank, this is Jane speaking. Do you remember Lucy's birthday? It is October the 16th, on Sunday. We are going to have a party for her and give her a great surprise. Would you like to plan...
A.
Because they are close friend.
B.
Because they are classmates.
C.
Because Lucy will graduate from school.
D.
Because it's for Lucy's birthday.
【单选题】Lucy and Jane are ____ Class Two. They are ____ the U.S.A. [ ] A. from; in
B.
in; from
C.
to; from
【单选题】When you have any questions，tum to Jane or Lucy or _________ your group．
A.
whichever
B.
whoever
C.
whatever
D.
wherever
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