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【单选题】
第二性征尚未发育时，原发性闭经是指
A.
年龄超过14岁，尚无月经来潮
B.
年龄超过15岁，尚无月经来潮
C.
年龄超过16岁，尚无月经来潮
D.
年龄超过17岁，尚无月经来潮
E.
年龄超过18岁，尚无月经来潮
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】第二篇 Sleep We all know that the normal human daily cycle of activity is of some 7 - 8 hours’ sleep alternating with some 16 - 17 hours’ wakefulness and that, broadly speaking, the sleep n...
A.
people hate the inconvenience of working on night shifts.
B.
your life is disturbed by changing from day to night routines and back.
C.
not all industries work at the same hours.
D.
it is difficult to find a corps of good night workers.
【单选题】下列各项中，哪项为子宫性闭经
A.
给予孕酮一有子宫出血
B.
给予孕酮一无子宫出血
C.
雌孕激素序贯用药一有子宫出血
D.
雌孕激素序贯用药一无子宫出血
E.
给予促性腺激素一有子宫出血
【单选题】原发性闭经指
A.
妇女年满20岁仍无月经来潮
B.
妇女年满18岁仍无月经来潮
C.
妇女年满16岁仍无月经来潮
D.
妇女年满'岁仍无月经来潮
E.
妇女年满12岁仍无月经来潮