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【单选题】
下列化合物进行E2消除反应,哪个活性最小?( )A.
B.
C.
C
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【简答题】听下面一段材料，回答第1-3小题。 1. Where is the bus when they are talking? A. On the way to the People's Square. B. At the People's Square. C. At the bus shop. 2. How will the man recognize the People's Square? A. ...
【单选题】What does the speaker say about extravagances?
A.
They may eventually drive one to bankruptcy.
B.
They should be done away with altogether.
C.
They are meant for the extremely wealthy.
D.
They can bring only temporary pleasures.
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