题目内容
前置胎盘时阴道流血特征是（ ）。
2021-10-10
A.无诱因、无痛性反复阴道流血
B.有痛性阴道流血
C.阴道流血常与外伤有关
D.阴道流血量与贫血程度不相符
E.休克程度多与阴道流血量不成正比
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