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旋转和滚动摩擦
Author:
Peng Yu
GeoGebra
New Resources
盈利與虧蝕
百分數及其應用
平行線的判定
异形操场
折扣
Discover Resources
垂心即內心
love
semops_柱體
earth
表内除法
Discover Topics
Linear Equations
Inequalities
Integral Calculus
Trigonometric Functions
Subtraction