在下图的四种情境中人对物体做功的是 提着桶在水平地面行走 举着杠铃原地不动 用力搬石头但没有搬动 推着小车前进面上匀速前进 A B C Template




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tomski在下图的四种情境中人对物体做功的是 提着桶在水平地面行走 举着杠铃原地不动 coloring