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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
New Resources
球體建築師
柱體建築師
兩位數加法
三位數除以一位數（二）
算柱 (兩位數)
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平行四邊形和長方形的大小
ｔｅｓｔ
共軛雙曲線
Ex5C#3
周界-平移法(練習二)
Discover Topics
Median Value
Rotation
General Quadrilateral
Complex Numbers
Rectangle