题目内容
胳带的安全长度是( )
2021-11-02
A.须超过从胎盘附着处达宫颈内口的距离
B.须超过从胎盘附着处达母体外阴的距离
C.从胎盘附着处达母体外阴的距离
D.须超过从胎盘附着处达宫颈外口的距离
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