如图，下列四幅图最能体现二战后“冷战”时期国际关系格局特征的是（ ）
答案：B
本题考查的是冷战的史实。第二幅漫画反映的是美苏争霸时期的史实，故选B。
In low-speed network，it is usually adequate to wait for congestion to occur and then react to it bytelling the source of packets to slow down．In high-speed networks，this approach often works poorly，because in the (71) between sending the notification and notification arriving at the source，thousands of additional (72) may arrive．In ATM network，a major tool for preventing (73) is (74) control．When a host wants a new virtual (75) ，it must describe the traffic to be offeredand the service expected．
（74）处填（）。
A．flow
B．admission
C．traffic
D．time
A．E=Bav，
B．E=NBav，
C．E=Bav，
D．E=NBav，
