题目内容

正常分娩时的分娩机制顺序是

2021-11-11

A.下降—衔接—俯屈—内旋转—仰伸—复位—外旋转

B.衔接—下降—俯屈—内旋转—仰伸—复位—外旋转

C.下降—衔接—内旋转—俯屈—内旋转—仰伸—复位—外旋转

D.衔接—下降—衔接—内旋转—俯屈—内旋转—仰伸—复位—外旋转

E.下降—衔接—俯屈—内旋转—仰伸—复位—外旋转

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