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拼貼11939
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11939葉宗弘
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GeoGebra
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兩位數加法
直角坐標平面上的旋轉變換
GeoGebra笔记功能体验课件
三位數除以一位數（一）
找出對稱軸
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蝴蝶定理推廣證明1
Lens2
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P4構作對稱圖形
辽南协作校10题
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