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正方形
Author:
何嘉驹
GeoGebra
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第八周作业
科氏力 (Coriolis Force)
盈利與虧蝕
第三周作业效果演示
折扣
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整數÷整數_工作紙（一）_題1
柱體建築師
不盡相異物的排列
比較分數大小
橢圓教學_2016
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Translation
Parametric Curves
Diagrams
Straight Lines
Plane Figures or Shapes