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【单选题】
关于光的传播,以下说法中正确的是 ( )
A.
光从一种介质进入另一种介质,速度发生变化
B.
光在任何情况下总是沿直线传播的
C.
光在不同介质中的传播速度都是3× m/s
D.
光由空气中射向水面,有可能发生全反射
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A.
sentiments
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【单选题】In Peking Opera, “a play” is not so much the story or plot but a world of images created onstage, a wonderful arena of harmony between and settings.
A.
sentiments
B.
players
C.
settings
D.
stages
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A.
正确
B.
错误
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A.
In spite of
B.
well-developed
C.
three-hours
D.
hold
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