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椭圆内反射
Author:
dhc987
GeoGebra
New Resources
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
找出對稱軸
異分母分數減法
Discover Resources
Slope of perpendicular lines
Trigonometry
八芒星
分段2
qid_39321
Discover Topics
Vectors 3D (Three-Dimensional)
Pie Chart or Circle Chart
Difference and Slope
Optimization Problems
LCM and GCD