如图所示同一物体在重力作用下沿三条不同的轨道从a�到b已知物体和这三条轨道间的动�擦因数相同则重力对该物体的做功情况是 A.沿轨道Ⅰ Template




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tomski如图所示同一物体在重力作用下沿三条不同的轨道从a�到b已知物体和这三条轨道间的动�擦因数相同则重力对该物体的做功情况是 a.沿轨道Ⅰ coloring