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19.3课题学习 选择方案
Author:
James Piaget
GeoGebra
New Resources
美國國旗 (Codex 版)
近似值：有效數字
拼砌四邊形
Nested spiral octagon
畫出對稱圖形
Discover Resources
分數的大小變化
廣義角
等值分數
熱帶魚 (顏色變更)楊靜宜
小數的認識（一）
Discover Topics
Differential Equation
Vectors 2D (Two-Dimensional)
Kite
Median Value
Numbers