如图所示虚线右侧水平面光�左侧是粗糙程度相同的水平面.右侧有一质量为m的正方体�块以一定的初速度��左侧通过虚线后�行的最大距离为l.若 Template




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tomski如图所示虚线右侧水平面光�左侧是粗糙程度相同的水平面.右侧有一质量为m的正方体�块以一定的初速度��左侧通过虚线后�行的最大距离为l.若 coloring