咳嗽、咳铁锈色痰常见于（）

A.肺结核

B.支气管扩张

C.大叶性肺炎

D.肺癌

E.急性肺水肿

Flame screens are used to（）.

A.contain flammable fumes

B.protect firefighters from flames

C.prevent flames from entering tanks

D.keep flames and sparks from getting out of an engine's exhanst system