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练习（点，斜率，直线）
Author:
朱亮
GeoGebra
New Resources
apec
Reflection = 180° Rotation about a Line
seo tool
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
Volume by Disk/Washer around y
Discover Resources
Abwandlungen der trigonometrischen Funktionen
Lessson 7-2
Incircle
casa para Mora
Copia di golden-vitruvian-br
Discover Topics
Functions
Kite
Straight Lines
Arithmetic Operations
Statistical Characteristics