以下是关于【杠杆的科学】的公开课/优质课视频，一共39个
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36:5292 -
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06:1516 -
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55:1021 -
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11:5284 -
14:2154 -
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40:2010 -
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55:36106 -
40:2142 -
45:4684 -
36:52122 -
40:2179 -
21:08103 -
43:02139 -
39:1895 -
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40:2027 -
07:3453 -
43:02123 -
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42:5867 -
08:3964 -
08:2877 -
39:4722 -
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45:1278 -
45:21126 -
44:3430 -
45:0456