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Author:
hou yi ting
孢落限
GeoGebra
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【案例】2013年安徽高考15题
画直线等分三角形的面积
球体的体积推导
多邊形的面積
兩位數除以一位數（二）
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onemove
橢圓
clock
linkage
函数作图工具的副本
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Right Triangles
Cube
Subtraction
Multiplication
Derivative