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1977福建卷文5
Author:
常振虎
GeoGebra
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兩位數加法
判斷球體
【案例】2013年安徽高考15题
球体的体积推导（优化版）
找出對稱軸
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三角形面積
E-X 电势-X
二元一次方程式
直線與平面垂直
三節棍
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Tangent Line or Tangent
Poisson Distribution
Trapezoid
Sequences and Series
Translation