如图所示n辆相同的汽车以等速度v沿宽为d的直公路行驶每车宽为b间距为a.若人能以最小速度沿直线垂直穿过马路则所用的时间为 A Template




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tomski如图所示n辆相同的汽车以等速度v沿宽为d的直公路行驶每车宽为b间距为a.若人能以最小速度沿直线垂直穿过马路则所用的时间为 a coloring