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1987全国理5
Author:
常振虎
GeoGebra
New Resources
sanjiaohanshu
三位數除以一位數（二）
異分母分數減法
三位數除以一位數（一）
錐體建築師
Discover Resources
指數圖形的平移
周界平移
孔明棋
Orthographic Views 1
拋物線2--焦點法
Discover Topics
Set Theory
Incircle or Inscribed Circle
Equilateral Triangles
Mode
Circle