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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
New Resources
四邉形 (四年級) 教師版
柱體建築師
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
Discover Resources
tool for age question
拋物線的兩切線
Dispersion
放大／縮小 Resize
虎牙
Discover Topics
Rational Numbers
Reflection
Division
Ellipse
Translation