单项选择题
A.47% B.48% C.49% D.50% E.51%
A.5600ml B.6200ml C.6800ml D.5400ml E.6000ml
A.变质性炎 B.卡他性炎 C.假膜性炎 D.肉芽肿性炎 E.化脓性炎