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tan900

Author:tan90

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空间中两直线的位置关系
兩位數加法
【案例】2018年全国1卷理科12题
球体的体积推导
讀磅

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三角形的外心
HKMO 2013 Question 3 Demonstration (Geometric Construction)
向量点乘
正弦图像
N-ellipse

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Trapezoid
Upper and Lower Sum or Riemann Sum
Quadratic Equations
Algebra
Boxplot

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