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Author:黃斌

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兩位數加法
兩位數除以一位數（一）
找出對稱軸
画直线等分三角形的面积
兩位數除以一位數（二）

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公切線長度的計算
Apollonius Problem 7 CCP Inversion simple 12
垂直3
Ice Mountain
路旁的树

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Similar Triangles
Isosceles Triangles
Statistical Characteristics
General Quadrilateral
Symmetry

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