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test2
Author:
chengshihfeng
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
錐體建築師
【案例】圆柱体内放置一个大球六个小球
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解數學題目
專題
教學-面與面的夾角
定积分的概念
座標1
Discover Topics
Conditional Probability
Geometric Mean
Subtraction
Symmetry
Secant Line or Secant