5.如图所示质量相等的物体a和物体b与地面的动�擦因数相 等在力f的作用下一起沿水平地面�右移动x则 A.�擦力对ab做功相等 B Template




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tomski5.如图所示质量相等的物体a和物体b与地面的动�擦因数相 等在力f的作用下一起沿水平地面�右移动x则 a.�擦力对ab做功相等 coloring