以下是关于【梯形的认识】的公开课/优质课视频，一共43个
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40:317 -
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58:59131 -
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40:3138 -
50:0287 -
38:45132 -
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37:0994 -
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40:3089 -
40:2769 -
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18:1185 -
40:0879