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椭圆的定义

Author:guomenglin

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拼砌四邊形
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
【案例】2018年全国1卷理科12题

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平行四邊形
GGB8
拋物線
Copy of 愛心
直方圖_Demo的副本

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Percentages
Similarity Transformation or Similarity
Set Theory
Pythagoras or Pythagorean Theorem
Pie Chart or Circle Chart

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