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國道etag收費
Author:
李春培
國道收費.
GeoGebra
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小数 的副本
判斷球體
球體建築師
畫出對稱圖形
錐體建築師
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阿基米德(3,8,8)
平行線
proof 49 黃彥淇
S6 3D Basic Concept
含有任意量词与存在量词的最值问题
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Sphere
Trigonometric Functions
Secant Line or Secant
Cuboid
Reflection