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双动点变速运动
Author:
陈铁成
GeoGebra
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找出對稱軸
兩位數加法
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
柱體建築師
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五邊形中點
Li Shan Lan Cone Pi
串珠
乘法表的自动练习的副本
Copy of 畢氏樹
Discover Topics
Normal Distribution
Distributions
Quadrilaterals
Curve Sketching
Cylinder