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中考2019北京—24

Author:宋晓燕

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畫出對稱圖形
兩位數加法
四邊形的特性
找出對稱軸
兩組對邊相等的四邊形

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waaachen
polygon(first upload)
眼睛的毛病(近視及遠視)
正立方體與平面的截面
六上：圆的面积公式推导

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Subtraction
Arithmetic Operations
Median Line
Trigonometry
Isosceles Triangles

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