下列四种情境中人对物体做功的是 A.提着水桶在水平地面上匀速前进b.举着杠铃原地不动c.用力搬石头但没有搬动d.推着小车前进 题目和参考 Template




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tomski下列四种情境中人对物体做功的是 a.提着水桶在水平地面上匀速前进b.举着杠铃原地不动c.用力搬石头但没有搬动d.推着小车前进 题目和参考 coloring