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解答,有采纳.You can't see through a telescope______it is adjusted

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解答,有采纳.You can't see through a telescope______it is adjusted correctly to your sight.A.because B.unless C.though D.as
B 再答: 除非你调整到和你视线相吻合。否则通过一个望远镜你什么也也看不到
再答: 除非你把望远镜调整到和你视线相吻合。否则你什么也看不到