在以下四种情境中人对物体做功的是a提着水桶原地不动b举着杠铃原地不动c用力推石头但没有推动d推着小车在水平地面上前进 题目和参考答案 Template




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tomski在以下四种情境中人对物体做功的是a提着水桶原地不动b举着杠铃原地不动c用力推石头但没有推动d推着小车在水平地面上前进 题目和参考答案 coloring