初产妇从有规律宫缩开始到宫颈扩张至3cm时，时间超过16小时称为() ["A．第一产程延长","B．第二产程延长","C．潜伏期延长","D．活跃期延长","E．总产程延长"]
高CO血症()还原Hb ["A．发绀","B．皮肤潮红","C．两者均有","D．两者均无"]
额先露的胎头，以下列哪条径线通过产道() ["A．枕颏径","B．枕额径","C．枕下前囟径","D．双顶径","E．双颞径"]
正常的潜伏期是指() ["A．从有规律的宫缩到宫颈扩张4cm","B．宫颈平均3～4小时扩张1cm","C．潜伏期约需10小时","D．从有规律宫缩到宫颈扩张9cm","E．从有规律宫缩到宫颈扩张3cm"]
初产妇，妊娠39周，胎儿与母体纵轴相互垂直，孕妇腹前壁可触及胎儿肢体，其胎方位是() ["A．肩左后","B．肩左前","C．肩右后","D．肩右前","E．不能诊断"]
PaCO增加()PaO增加()PaCO下降()
