A.4~6 B.7~8 C.6~7 D.6~8 E.4~5
A.坐骨神經(jīng) B.股神經(jīng) C.腓總神經(jīng) D.臀上皮神經(jīng) E.脛前神經(jīng)
A.4~8周 B.8~12周 C.2~4周 D.12周 E.12~24周