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【单选题】
鉴别环丙烷和丙烯可用下列哪种试剂?
A.
高锰酸钾
B.
溴的四氯化碳溶液
C.
氯化氢
D.
银氨溶液
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A.
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B.
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C.
dwellers
D.
people
【判断题】所有初等函数在其定义域内都是连续的。
A.
正确
B.
错误
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A.
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B.
产后4周宫颈完全恢复正常形态
C.
子宫4周恢复至非孕期大小
D.
子宫重量约为50g
E.
产后10d子宫降至骨盆腔内
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