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三角函數由來= =
Author:
陳柄何
GeoGebra
New Resources
兩位數加法
兩位數除以一位數（二）
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
第八周作业
Discover Resources
Centroid
test000
立面化設計
滑桿動畫
[洋葱] 费马点问题
Discover Topics
Pyramid
Sine
Frequency Distribution
Rhombus
Normal Distribution