Why have the Americans developed space shuttle according to the passage

A．It is a first step to explore outer space.

B．It is a follow-up action of the Apollo moon landings.

C．It is a compromise to the exorbitant human expeditions to the Mars.

D．It is a compensation for the wishful thinking of human landing on the Mars.

咳出痰有恶臭味的疾病为（）

A.空洞性肺结核

B.肺囊肿继发感染

C.吸入性肺炎

D.大肠杆菌肺炎

E.厌氧菌所致肺脓肿