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特製的門
Author:
李春培
特製的門
https://www.facebook.com/video.php?v=730160733696759&fref=nf
GeoGebra
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画直线等分三角形的面积
畫出對稱圖形
兩位數除以一位數（二）
拼砌四邊形
四邉形 (四年級) 教師版
Discover Resources
龍騰4_1-1習6-2
winter vacation homework 8
複合圖形(八)
三元數大作戰
直方圖_Demo的副本
Discover Topics
Mathematics
Triangles
Trigonometric Functions
Integral Calculus
Sequences and Series