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三角函數的性質
Author:
yuchengda
GeoGebra
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【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
兩位數除以一位數(二)
異分母分數減法
四邊形的特性
Discover Resources
arithmetic operation
Projection01
数学几何
抛豆实验
乘法練習
Discover Topics
Secant Line or Secant
Piecewise Functions
Linear Programming or Linear Optimization
Upper and Lower Sum or Riemann Sum
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