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练习（点，斜率，直线）
Author:
朱亮
GeoGebra
New Resources
Perpetual calendar
Tube moving at distance of a curve.
seo tool
רישום חופשי
Untitled
Discover Resources
Parallel lines 2
chapter1-5 review #40
Corresponding Angles
Hexagon integral sides
Discover Topics
Derivative
Unit Circle
Rotation
Piecewise Functions
Translation