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一个桶八个球
Author:
孟宝兴
GeoGebra
New Resources
sanjiaohanshu
拼砌四邊形
兩位數加法
GeoGebra笔记功能体验课件
三位數除以一位數（二）
Discover Resources
鋸齒狀的函數
Scatter diagram(散點圖)
光的折射（光线自右下向左上）
perimeter
圓錐截痕
Discover Topics
Area
Similar Triangles
Integers
Percentages
Definite Integral