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凸透鏡的成像（理想）
Author:
joeyliaw.tw
GeoGebra
New Resources
算柱 (兩位數)
兩位數除以一位數（二）
判斷球體
找出對稱軸
錐體建築師
Discover Resources
波的干涉 Wave Interference
一次函数图象及性质
平行線法
Tangent of a Circle 圓的切線
Copy of 「相似三角形」任务1
Discover Topics
Distributions
Plane Figures or Shapes
Straight Lines
Arithmetic
Integral Calculus