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太极图
Author:
吕胜
GeoGebra
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四邉形 (四年級) 教師版
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
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阿基米德(5,6,6)
角的認識
p10-4
序列
Find your perfect rectangle
Discover Topics
Linear Equations
Symmetry
Terms
Multiplication
Histogram