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題五
Forfatter
Tse Sir
GeoGebra
Nye Materialer
判斷球體
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
找出對稱軸
拼砌四邊形
Opdag Ressourcer
ie 3
US Unemployment 200701~201707
Copy of 分數與小數
Gazing Cow Problem (a)
圆面积公式推导
Udforsk emner
Rotation
Pyramide
Afledte
Grafskitsering
Cylinder