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平行線的斜率_hui sir
Author:
Hui Sir
GeoGebra
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三位數除以一位數（二）
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
四邊形的特性
異分母分數減法
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旋轉一物件
正八面體
test2fhms
ｔｅｓｔ
同餘
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Rotation
Calculus
Multiplication
Prism
LCM and GCD