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congruent triangle2_provided by Mr Yeung Kar Chun
Author:
kidmancmw
GeoGebra
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【案例】2018年全国1卷理科12题
找出對稱軸
異分母分數減法
球體建築師
兩位數除以一位數（一）
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分形几何欣赏初步：树型图
Captain America
分數加法
Rectangle
Fractal
Discover Topics
Subtraction
Coordinates
Fractions
Derivative
Means