镇肝熄风汤和天王补心丹组成中均含有的药物是（）

A.沙参、麦冬

B.玄参、天冬

C.麦冬、牛膝

D.当归、生地黄

E.天冬、当归

Class A EPIRBs are required on（）.

A.self-propelled，inspected vessels

B.towing vessels

C.recreational vessels

D.uninspected passenger vessels