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國道計程收費
Author:
李春培
國道計程收費
GeoGebra
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兩位數除以一位數（一）
四邊形的特性
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
算柱 (兩位數)
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Area of square
橢圓與雙曲線折紙
winter vacation homework 12
摺長方形
高中物理电磁学·磁聚焦
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Cosine
Vectors
Histogram
Quadrilaterals
Similar Triangles