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轴对称图形（翻折问题）
Author:
浅蓝色
GeoGebra
New Resources
科赫雪花
三角函数 的副本
折扣
撒针估算面积实验
异形操场
Discover Resources
angle
正多面體
test01
点到双曲线的切线方程
江苏高考物理最后一题模拟
Discover Topics
Numbers
Statistics
Polynomial Functions
Integral Calculus
Fractions