如图所示在粗糙水平面上放一质量为m的斜面质量为m的木块在竖直�上力f作用下沿斜面匀速下�此过程中斜面保持静止则地面对斜面 a.无 Template




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tomski如图所示在粗糙水平面上放一质量为m的斜面质量为m的木块在竖直�上力f作用下沿斜面匀速下�此过程中斜面保持静止则地面对斜面 a.无 coloring