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23平行线周长正方形
Author:
万超杰
GeoGebra
New Resources
【案例】2013年安徽高考15题
兩位數加法
球體建築師
三位數除以一位數（一）
判斷球體
Discover Resources
vector addition and subtraction
顶顶顶顶顶顶顶顶顶顶
構作對稱圖形
行程圖 (Travel Graph) 的複本
【初中】动点问题
Discover Topics
Normal Distribution
Limits
Piecewise Functions
Vectors 2D (Two-Dimensional)
Random Experiments