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Author:
王廷祐
GeoGebra
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【案例】2018年全国1卷理科12题
錐體建築師
兩位數除以一位數（一）
球體建築師
畫出對稱圖形
Discover Resources
waaachen
趙庭浩的GGB電子書
cube 3D
判別式
平方差公式的几何意义
Discover Topics
General Quadrilateral
Mathematics
Natural Numbers
Upper and Lower Sum or Riemann Sum
Translation