下列说法中不正确的是a功率是表示物体做功快慢的物理量b由于额外功不可避免机械效率总是小于1c机械效率越大所做的有用功越多d功率越大 Template




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tomski下列说法中不正确的是a功率是表示物体做功快慢的物理量b由于额外功不可避免机械效率总是小于1c机械效率越大所做的有用功越多d功率越大 coloring