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陳隆期
GeoGebra
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sanjiaohanshu
【案例】2013年安徽高考15题
畫出對稱圖形
四邉形 (四年級) 教師版
兩位數除以一位數（二）
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方格紙上畫四邊形
正立方形與兩面角
Percentage Change(百分變化)
qr code for symmetry
linear programing by Mr LO WY
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Constructions
Set Theory
Special Points
Differential Equation
Straight Lines