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塗色03
Author:
李伶芳
GeoGebra
New Resources
兩位數除以一位數（一）
球体的体积推导
【案例】2013年安徽高考15题
畫出對稱圖形
兩組對邊相等的四邊形
Discover Resources
Quiz on Simplifying Monomials 化簡單項式：測驗
earth
Gazing Cow Problem (a)
百分數：折扣 / 賺賠
Kopia soccer