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congruent (SSS) 2
Author:
Ricky Chan
GeoGebra
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兩位數加法
三位數除以一位數（一）
找出對稱軸
三位數除以一位數（二）
算柱 (兩位數)
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waaachen
http://www.qsir.org/?p=8853
松菸巨蛋談判工作表
夜市麻將2
函数的单调性和导数的副本
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Translation
Derivative
Matrices
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