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Author:
侯孟宏
GeoGebra
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垂直線的斜率
【案例】2013年安徽高考15题
兩位數加法
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
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挑战中考压轴题
smps perimeter
正角柱體
barara magic stick
hello
Discover Topics
Differential Calculus
Perimeter
Symmetry
Tangent Line or Tangent
Geometric Transformations