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zhlaoshi -一次函数
Author:
张老师
GeoGebra
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找出對稱軸
異分母分數減法
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
Discover Resources
圓周
三下_三角形(學生版)
三角形重心軌跡(動點在三圓上)
正方形
畢氏定理
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Derivative
Upper and Lower Sum or Riemann Sum
Trapezoid
Rotation
Tree Diagrams