以下是关于【波的反射】的公开课/优质课视频，一共53个
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51:5126 -
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36:31107 -
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35:5680 -
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40:3954 -
22:0522 -
22:03137 -
56:1029 -
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45:1967 -
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41:2849 -
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12:565 -
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38:5284 -
08:35135