单项选择题
A.肋膈沟 B.串珠肋 C.方颅 D.鸡胸 E.颅骨软化
A.50%~60% B.55%~65% C.50%~70% D.60%~70% E.40%~50%
A.8ml B.10ml C.12ml D.14ml E.16ml