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2001年全国高考选择第12题:如图,小圆圈表示网络的结点,结点之间的连线表示它们有网线相联, 连线标注的数字表示该段网线单位时间内可以通过
In 2001, the National College Entrance Examination chose Item #12: As shown in the figure, small circles indicate the nodes of the network. The lines between the nodes indicate that they are connected by network cables. The number marked by the connection line indicates that the network cable can pass through the unit within the unit time.