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圆锥曲线定义的拓展（卡西尼卵形线）
Author:
梁航宇
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
兩組對邊相等的四邊形
Discover Resources
Boxes
不盡相異物的排列
探索二次函数的性质
weihaoxia
老師講解8
Discover Topics
LCM and GCD
Variance
Linear Equations
Means
Quadratic Equations