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利用对称求线段和最值（移动端）
Author:
梁航宇
GeoGebra
New Resources
錐體建築師
sanjiaohanshu
異分母分數減法
畫出對稱圖形
【案例】2018年全国1卷理科12题
Discover Resources
歪斜線夾四面體
GeoGebra
余弦定理的证明
相位角、頻率
直线过定点问题(1)
Discover Topics
Complex Numbers
Parabola
Median Value
Logic
Rational Numbers