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Author:
吉顺国
GeoGebra
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畫出對稱圖形
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
找出對稱軸
異分母分數減法
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HOMEWORK
Opening Box
gmj106a13 八角錐
三角比的性質
雙曲線2-焦點法