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教学素材：抛物线与象限半区分界线
Author:
清风拂琴，陌上花开
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
畫出對稱圖形
柱體建築師
Discover Resources
風車2
rectangular
cycloid
Copy of 固定面積的圖形的周界變化
三视图积木
Discover Topics
Differential Equation
Rotation
Geometry
Triangles
Square