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fchengang动画
Author:
符成岗
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
異分母分數減法
兩位數加法
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Key stage 1
直線與曲線
Congruent Triangles
三角形有向面積
基础知识
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Rhombus
Circumcircle or Circumscribed Circle
Inequalities
Calculus
Exponential Functions