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Author:
呂麗珠
GeoGebra
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異分母分數減法
四邊形的特性
球体的体积推导（优化版）
錐體建築師
判斷球體
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正方形和長方形有甚麼特性？
王濰平(8B) 作業
gjc096b28 等腰三角形邊上一點與角度
負指數的計算
直方图002
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Histogram
Plane Figures or Shapes
Rational Numbers
Straight Lines
Constructions