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面鏡的反射
Author:
dunst kang
GeoGebra
New Resources
三位數除以一位數（一）
異分母分數減法
兩位數加法
画直线等分三角形的面积
拼砌四邊形
Discover Resources
錯角---水平平行綫
线段-视觉差
RLC串聯諧振
小五_多邊形面積01
平行線的斜率
Discover Topics
Division
Conic Sections
Prism
Limits
Planes