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peacock
Author:
李春培
peacock
GeoGebra
New Resources
三位數除以一位數（一）
判斷球體
兩位數除以一位數（一）
異分母分數減法
第八周作业
Discover Resources
三角形的构成
Constructing Quadrilaterals by Four Sides (2014)
扇形柱
串珠
笛卡兒之心
Discover Topics
Dilation
Angles
Indefinite Integral
Right Triangles
Numbers