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指數1209
Author:
13 galaxy_cc
GeoGebra
New Resources
找出對稱軸
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
【案例】2013年安徽高考15题
兩位數除以一位數（二）
Discover Resources
平行線的斜率_hui sir
九九乘法表
畢氏定理證明（Ｉ）
串珠(大小不同)
Hyperbola_Horizontal
Discover Topics
Linear Programming or Linear Optimization
Derivative
Rhombus
General Quadrilateral
Constructions