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2019丰台二模
Author:
面包与咖啡
GeoGebra
New Resources
異分母分數減法
画直线等分三角形的面积
兩位數除以一位數（二）
拼砌四邊形
兩位數除以一位數（一）
Discover Resources
波的干涉 Wave Interference
斜率
數未學習社12/15
Properties of a Rectangle
靜態幾何錯視圖
Discover Topics
Statistical Characteristics
Optimization Problems
Derivative
Combinatorics
Equations