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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
四邉形 (四年級) 教師版
【案例】2013年安徽高考15题
找出對稱軸
第八周作业
錐體建築師
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圆的面积展开
正弦定理的验证
Conic section
Drag C and see
乘法训练
Discover Topics
Median Line
Distributions
Differential Calculus
Multiplication
Expected Value