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平面鏡成像 Image of Plane Mirror Reflection
Author:
W.L. Wong, Albert
New Resources
学问思1206-2
不存在的三角函数
对角线互相垂直的四边形，证倍分关系的副本
傅里叶级数 Fourier series
学而思1206
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六下_圓周(學生版)
final report
試證明：A=B+C
優良作品2(怡雯)
gjc100a34 兩三角形重疊面積比
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Ellipse
Arithmetic Operations
Geometry
Quadrilaterals
Straight Lines
