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 131 views
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热机 -2
0 Comments 134 views
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热机 -1
0 Comments 135 views
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内能的利用 -3
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内能的利用 -2
0 Comments 144 views
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内能的利用 -1
0 Comments 146 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
0 Comments 141 views
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改变内能的两种方法 -1
0 Comments 134 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 141 views
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分子热运动 微棵2
0 Comments 136 views
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功 -3
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功 -2
0 Comments 133 views
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功 -1
0 Comments 132 views
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杠杆 -3
0 Comments 136 views
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杠杆 -2
0 Comments 135 views
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杠杆 -1
0 Comments 135 views
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