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peacock3
Author:
李春培
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
第八周作业
兩位數除以一位數（二）
判斷球體
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Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
畢式定理（丞昀）
雙橢
試算表的很多正方形
二面角的夹角
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Statistics
General Quadrilateral
Optimization Problems
Continuity
Multiplication