单项选择题
A.20~40ml B.30~60ml C.50~80ml D.90~150ml E.120~180ml
A.机体反应差 B.脑膜炎症反应不如年长儿强 C.颅缝与囟门未闭,对颅内压起缓冲作用 D.颈肌不发达 E.大脑处于抑制状态
A.1/5~1/6 B.1/6~1/7 C.1/7~1/8 D.1/8~1/9 E.1/9~1/10