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Author:
阳光
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錐體建築師
球體建築師
兩位數加法
【案例】2013年安徽高考15题
四邊形的特性
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黎曼和
行列式計算平行四邊形面積
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简易立体几何的副本
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Parabola
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Geometric Transformations
Cuboid
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