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1986全国理24
Author:
常振虎
GeoGebra
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拼砌四邊形
異分母分數減法
画直线等分三角形的面积
兩位數除以一位數（一）
柱體建築師
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平行四邊形變奏曲III
n等分點
傅立葉級數
Salaries Tax in Hong Kong 薪俸稅
第4課
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Definite Integral
Median Value
Circle
Fractions
Curve Sketching