题目：
Why have the Americans developed space shuttle according to the passage
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.
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.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
