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Author:
徐长俊
GeoGebra
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異分母分數減法
畫出對稱圖形
球体的体积推导（优化版）
找出對稱軸
球體建築師
Discover Resources
千變萬化的顏色
畢式定理 (06)
空間畢氏定理
Hyperbola_Vertical
三角函数
Discover Topics
Hypergeometric Distribution
Triangles
Parametric Curves
Exponent
Logic