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冷氣機的銷量
Author:
iedc
GeoGebra
New Resources
四邉形 (四年級) 教師版
異分母分數減法
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
Discover Resources
給錐體一個名字 1
PA + PB
拋物線1 焦點法
曲面指令练习（柱球转化）
一个桶八个球
Discover Topics
Circumcircle or Circumscribed Circle
Difference and Slope
Quadratic Equations
Arithmetic Mean
Polygons