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sharon扭曲的正方形
Author:
杨秀芬
GeoGebra
New Resources
找出對稱軸
異分母分數減法
拼砌四邊形
三位數除以一位數（一）
四邊形的特性
Discover Resources
HKDSE 3D Figures
數字的加減數線表示
編織圓
基础知识
洋葱初中数学
Discover Topics
Random Experiments
Limits
Curve Sketching
Cone
Standard Deviation