A.乳突與枕外隆突連線中點(diǎn) B.乳突與枕外隆突連線中點(diǎn)下方2cm C.乳突與枕外隆突連線中下1/3 D.乳突與枕外隆突連線中上1/3 E.乳突與枕外隆突連線中點(diǎn)上方2cm
A.C5神經(jīng)阻滯 B.C2神經(jīng)阻滯 C.C4神經(jīng)阻滯 D.C3神經(jīng)阻滯 E.C6神經(jīng)阻滯
A.子宮口開(kāi)大到2~4cm B.第一產(chǎn)程開(kāi)始 C.第二產(chǎn)程開(kāi)始 D.子宮收縮開(kāi)始時(shí) E.羊膜破水后