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钟表制作成功啦
Author:
辛贺华
GeoGebra
New Resources
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
球體建築師
算柱 (兩位數)
Discover Resources
整數的加法
信賴區間
GGB動畫
君子球
gjc096a19 平行四邊形內截兩扇形
Discover Topics
Parametric Curves
Cylinder
Surface
Difference and Slope
Unit Circle