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【单选题】
关于枕左前位的分娩机制,下列哪错误的
A.
俯屈、内旋转、、复位及外旋转等动作都贯穿于下降过程之中
B.
俯胎头下降达到骨盆底时遇到阻力而发生的
C.
内旋转时胎头枕部被推向母体前方
D.
是枕骨抵达耻骨联合下方时发生的
E.
胎头进入骨盆入口平面时以枕下前卤径衔接
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