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Author:
Lee Chun Ming
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畫出對稱圖形
球体的体积推导
異分母分數減法
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
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Rotational Symmetry - Cube
testssss
HKCEE-AM 2010 Q17 additional part
Copy of 固定周界的長方形的面積變化
拋物線
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Functions
Real Numbers
Rotation
Natural Numbers
Pie Chart or Circle Chart