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3相電源相序檢測
Author:
歐鎮寬
GeoGebra
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【案例】2018年全国1卷理科12题
三位數除以一位數（二）
兩位數除以一位數（二）
異分母分數減法
算柱 (兩位數)
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有向角
Liu Hui's Method of Finding π
Copy of 方格紙上畫四邊形
麻之葉
中國火柴遊戲二的副本
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Matrices
Correlation
Incircle or Inscribed Circle
Plane Figures or Shapes
Pyramid