在比较�轮组机械效率的实验中实验过程如下Ⅰ.如图甲所示用弹簧测力计测量两个钩码的总重力为gⅡ.如图乙所示用动�轮提升钩码Ⅲ.如 Template




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tomski在比较�轮组机械效率的实验中实验过程如下Ⅰ.如图甲所示用弹簧测力计测量两个钩码的总重力为gⅡ.如图乙所示用动�轮提升钩码Ⅲ.如 coloring