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Author:
李春培
happy new year
GeoGebra
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球体的体积推导
球体的体积推导（优化版）
GeoGebra笔记功能体验课件
【案例】2018年全国1卷理科12题
畫出對稱圖形
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垂心即內心
Quiz on Conditions for Congruence of Triangles 全等三角形的判定條件：測驗
P.6 圓周4A
柱體
长方形边线展开
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Real Numbers
Congruence
Pyramid
Conditional Probability
Logarithm