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國八：乘法公式與多項式-分項對消_乘法
Author:
賴尚欣
GeoGebra
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拼砌四邊形
四邊形的特性
兩位數除以一位數（二）
四邉形 (四年級) 教師版
球體建築師
Discover Resources
方格紙上畫平行四邊形2
Surface area of sphere
test08
圓的基本慨念的副本
手拉手模型
Discover Topics
Solids or 3D Shapes
Logarithm
Cylinder
Quadratic Functions
Conic Sections