A.10~20ml B.20~30ml C.30~40ml D.40~50ml E.以上均不對(duì)
A.第1腰椎下緣 B.第2腰椎下緣 C.第3腰椎下緣 D.第4腰椎下緣 E.第5腰椎下緣
A.75~100ml B.100~125ml C.125~150ml D.150~175ml E.25~30ml