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Author:王廷祐

Topic:Orthocenter

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三位數除以一位數（二）
【案例】2013年安徽高考15题
【案例】2018年全国1卷理科12题
畫出對稱圖形
柱體建築師

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平行的角度
樣本大小與抽樣誤差
Angle Sum in a Triangle
练习及小结
物體的平面運動

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Prism
Hypergeometric Distribution
Arithmetic Operations
Root
Square

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