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欢度春节（灯笼）
Author:
zgc112
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
四邊形的特性
異分母分數減法
畫出對稱圖形
Discover Resources
正方形的旋轉2
凹透镜
餘弦公式2
放射狀圖形(1)
一次函数经过象限操作
Discover Topics
Tangent Function
Upper and Lower Sum or Riemann Sum
Rectangle
Difference and Slope
Vectors 2D (Two-Dimensional)