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鏡面反射光線
Author:
紀老師
鏡面反射光線的動畫 入射角=反射角
GeoGebra
New Resources
錐體建築師
兩位數除以一位數（二）
兩位數加法
找出對稱軸
第八周作业
Discover Resources
整數或分數÷分數_ 工作紙（一）_題3c
Comparing fractions using number lines and rectangles
随机数表
美麗的花
西图对
Discover Topics
Parallelogram
Real Numbers
Arithmetic
Statistics
Matrices