物体与粗糙斜面一起沿水平面�左匀速运动物体和斜面相对静止如图所示.则斜面对物体的总作用力方� A.必沿b方�b.必沿c方�c.必沿d Template




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tomski物体与粗糙斜面一起沿水平面�左匀速运动物体和斜面相对静止如图所示.则斜面对物体的总作用力方� a.必沿b方�b.必沿c方�c.必沿d coloring