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1977上海理4
Author:
常振虎
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
拼砌四邊形
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
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正n星角
Progressive Formula
周界
Copy of 小數的認識
斜坐標
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Means
Inequalities
Special Points
Complex Numbers
Area