A everything B a great success C a tremendous failure D nothing E many firsts F quite possible Mir enhanced the confidence in t

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问题 A everything
B a great success
C a tremendous failure
D nothing
E many firsts
F quite possible
Mir enhanced the confidence in the scientists that humans living in space for a long time was______.

选项

答案F

解析 选F的依据在第八段:(Mir)will be remembered as a milestone in space exploration and the space station that showed long—term human habitation in space was possible。
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