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【判断题】
1986年，美国“挑战者”号航天飞机进行第25次飞行时，发生了空中爆炸，7名航天员丧生，这暴露了航天飞机技术上存在的一些问题。（）
A.
正确
B.
错误
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【单选题】Human Space Exploration While scientists are searching the cause of the Columbia disaster, NASA is moving ahead with plans to develop a new craft that would replace shuttles (航天飞机) on space station mi...
A.
ontrol the International Space Station.
B.
arry astronauts to the International Space Station.
C.
ransport equipment to the International Space Station.
D.
rain astronauts in space flights．
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【单选题】Human Space Exploration While scientists are searching the cause of the Columbia disaster, NASA is moving ahead with plans to develop a new craft that would replace shuttles (航天飞机) on space station mi...
A.
ontrol the International Space Station.
B.
arry astronauts to the International Space Station.
C.
ransport equipment to the International Space Station.
D.
rain astronauts in space flights．
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