vanstone

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探究平面镜成像特点 -2
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探究平面镜成像特点 -1
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热机 -3
0 Comments 93 views
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热机 -2
0 Comments 96 views
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热机 -1
0 Comments 97 views
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内能的利用 -3
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内能的利用 -2
0 Comments 102 views
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内能的利用 -1
0 Comments 106 views
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改变内能的两种方法 -3
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改变内能的两种方法 -2
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改变内能的两种方法 -1
0 Comments 94 views
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分子热运动 -1
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分子热运动 微棵3
0 Comments 105 views
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分子热运动 微棵2
0 Comments 95 views
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功 -3
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功 -2
0 Comments 93 views
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功 -1
0 Comments 90 views
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杠杆 -3
0 Comments 96 views
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杠杆 -2
0 Comments 94 views
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杠杆 -1
0 Comments 94 views
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