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happy new year
Author:
李春培
happy new year
GeoGebra
New Resources
兩位數加法
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
Discover Resources
銀杏葉
Copy of 固定周界的長方形的面積變化
三角排列
Copy of 圓周公式應用題1
太陽系的奧秘
Discover Topics
Probability
Quadratic Equations
Means
Right Triangles
Circumcircle or Circumscribed Circle