单项选择题
A.20s B.30s C.60s D.90s E.120s
A.β-内酰胺类 B.氨基糖苷类 C.大环内酯类 D.磺胺类 E.氟喹诺酮类
A.气管粘膜 B.咽喉部 C.肺泡 D.胃 E.支气管粘膜