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椭圆的定义
Author:
蔡永志
椭圆的定义
GeoGebra
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【案例】2013年安徽高考15题
兩位數加法
錐體建築師
GeoGebra笔记功能体验课件
找出對稱軸
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龍騰4_1-1課例5
Maths p1
優良作品4(楚耘)
直線排列 4
角内切圆
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Differential Calculus
Line Segment
Volume
Multiplication
Diagrams