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双动点变速运动
Author:
陈铁成
GeoGebra
New Resources
錐體建築師
【案例】2013年安徽高考15题
三位數除以一位數（二）
找出對稱軸
判斷球體
Discover Resources
找動矩形的軌跡
some pic
函數圖形
四邊形內多個四邊型旋轉
ghseh 二次函數描點法頂點法-5
Discover Topics
Similar Triangles
Rhombus
Geometry
Poisson Distribution
Surface