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椭圆内反射
Author:
zhen chen
GeoGebra
New Resources
畫出對稱圖形
【案例】2013年安徽高考15题
四邉形 (四年級) 教師版
三位數除以一位數（一）
異分母分數減法
Discover Resources
圓錐截痕
正五角柱展開
Question 1(Angle)
Locus (Two points 1)
描点法画三角函数图像
Discover Topics
Natural Numbers
Scalene Triangles
Distributions
Linear Functions
Vectors