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平行線法
Author:
chen mingchuan
GeoGebra
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小数 的副本
異分母分數減法
【案例】2018年全国1卷理科12题
兩位數加法
兩位數除以一位數（二）
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cube 3D
version 1
Copie de 河內塔 (Tower of Hanoi)
F1Ch8 Translation basic
圆锥曲线的第二定义的副本
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Exponential Functions
Parabola
Trigonometric Functions
Indefinite Integral
Plane Figures or Shapes