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滚动的石头
Author:
阳光
Topic:
Polygons
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
異分母分數減法
兩位數除以一位數（一）
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
Discover Resources
Exploring the changes in mean and median
US Unemployment 200701~201707
兩圓位置關係與公切線
數學繪圖
題 5
Discover Topics
Quadrilaterals
Tangent Line or Tangent
Similar Triangles
Hypergeometric Distribution
Calculus