What does the news item say about Richard Nafzger?
A.
He is assigned the task to look for the tapes.
B.
He believes that the tapes are probably lost.
C.
He works in a NASA ground receiving site.
D.
He had asked for the tapes in the 1970s.
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参考答案:
举一反三
【简答题】I love science and science fiction. Like many science fiction fans, I am fascinated by the possibility of time travel. However, one must combine romance with reasoning and look into the chances of tim...