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教学素材：椭圆参数方程
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
美國國旗 (Codex 版)
四邉形 (四年級) 教師版
第八周作业
畫出對稱圖形
球體建築師
Discover Resources
龍騰4_1-1講段8
判斷球體 7
救生員的職責
不規則圖形的周界(T)
三角形
Discover Topics
Piecewise Functions
Indefinite Integral
Combinatorics
Arithmetic Mean
Pie Chart or Circle Chart