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如果光从一种介质垂直射向另一种介质,此时入射角是___度,折射角是___度
如果光从一种介质垂直射向另一种介质,此时入射角是___度,折射角是___度
呢
呢
物理人气:127 ℃时间:2020-03-28 12:03:19
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