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【单选题】
例庆大霉素的耳毒性属于:A.
毒性反应
B.
过敏反应
C.
后遗效应
D.
继发反应
E.
撤药反应
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A.
不受最初水平和最末水平的影响
B.
只受最初水平和最末水平的影响
C.
只受中间各期水平的影响
D.
既受最初水平和最末水平的影响，也受中间各期水平的影响
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【单选题】Furthermore, we have seen the number of books sold increases dramatically.
A.
formal
B.
informal
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