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教学素材：椭圆离心率
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
兩位數加法
錐體建築師
三位數除以一位數（一）
四邊形的特性
柱體建築師
Discover Resources
分數除法4: 1 ÷ a/b (包含)
動態面積展示
旋转文本
HW question locus 2
圆锥侧面展开图
Discover Topics
Parametric Curves
Scalene Triangles
Solids or 3D Shapes
Quadrilaterals
Curve Sketching