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cherry910502
GeoGebra
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拼砌四邊形
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
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小學數學科 HTML5 Applets
afdsfsdfds
二維序列物件
圓的基本慨念的副本
斐波那契螺旋弧线（表格法-可动态调节）
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Terms
Equilateral Triangles
Triangles
Polynomial Functions
Straight Lines