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围棋（可摆盘、双人对战，不可人机对战）
Author:
阳光
Topic:
Constructions
GeoGebra
New Resources
兩位數加法
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
兩位數除以一位數（二）
近似值：有效數字
Discover Resources
畢氏定理動態證明(四塊直角三角形移動)
優良作品6
試算表纏繞畫
Copy of 平行四邊形
Quiz on Addition and Subtraction of Directed Numbers (1)
Discover Topics
Vectors
Ratios
Median Value
Sphere
Geometric Transformations