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圆锥曲线的第二定义
Author:
孟宝兴
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（一）
判斷球體
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
Discover Resources
偏導數、切平面、梯度
平面
封閉區域填色
ghseh 二次函數描點法頂點法-3
Congruent Triangle (SSS)
Discover Topics
Ellipse
Probability
Boxplot
General Quadrilateral
Power Functions