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Author:
吉顺国
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
画直线等分三角形的面积
柱體建築師
兩位數除以一位數(二)
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Copy of 閱讀鐘面及數字鐘(時和分)
SSA為何不能保證全等
(002)80102史巧薇
周界-平移法(練習四)
三角形综合题
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Tangent Line or Tangent
Parallelogram
Differential Equation
Definite Integral
Vectors 3D (Three-Dimensional)