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Author:
cktsang
permutation (chi. ver.)
GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
柱體建築師
四邊形的特性
【案例】2013年安徽高考15题
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HKCEE 2011 Q17
Centres
Directed numbers
P4菱形定義
三角柱體的體積
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Sequences and Series
Exponent
Quadrilaterals
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