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【单选题】
A2题型】女33岁,第一胎37+3临产,子宫收缩乏力,相关解释正确的是A.
第二产程延长是指初产妇开全后,超过1小时,尚未分娩
B.
继发性宫缩乏力常见于头盆不称、中骨盆狭窄、持续性枕横位
C.
活跃期停滞是指宫颈扩张3~5cm后,宫缩弱,宫颈不继续扩张
D.
潜伏期延长是宫颈扩张2~3cm至7~8cm的时间延长,宮缩弱
E.
总产程超过26小时者,称为滞产
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