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足迹
Author:
孟宝兴
足迹
GeoGebra
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找出對稱軸
畫出對稱圖形
四邉形 (四年級) 教師版
三位數除以一位數(二)
四邊形的特性
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beauty from WuLing.TW
GGB動畫
Copy of 部分佔全部的百分率: 例1
圓周_心算題01
椭圆的参数方程的副本
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Histogram
Equilateral Triangles
Triangles
Surface
Complex Numbers