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问题 单项选择题

零售药店不得经营的药品是（）

A.医疗用毒性药品

B.抗病毒药

C.终止妊娠药品

D.注射剂

答案

参考答案：C

解析：零售药店不得经营终止妊娠药品。故选C。

选择题
We _____ the problem for quite some time. But we ______ any conclusion (结果) yet.

A. have been discussing, haven't reached
B. have discussed, haven't been reading
C. discussed, haven't reached
D. had discussed, haven't reached
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问答题 简答题

函数的递归调用和函数的嵌套调用的主要区别是什么？
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