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天干與地支
Author:
李春培
天干與地支
GeoGebra
New Resources
找出對稱軸
柱體建築師
三位數除以一位數（一）
球体的体积推导（优化版）
判斷球體
Discover Resources
Projection
旋轉一物件02
平移動畫(平移加滑桿)
Copy of 固定周界的長方形的面積變化
Activity 1
Discover Topics
Exponent
Quadratic Functions
Ellipse
Complex Numbers
Frequency Distribution