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【单选题】
1041 以下关于分组交换说法正确的是( )。A.
分组按序到达接收方
B.
线路利用率高
C.
每个分组同一个路由
D.
网络转发的时延很短
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举一反三
【单选题】The young man hurried back because ______.
A.
he remembered he had left something on the train
B.
he realized that he had got off at the wrong station
C.
a passenger was calling him back by his name
D.
a passenger shouted to him that he had left something behind
【简答题】A．He had something more important to do. B．He had no passion for it. C．There was power cut-off in his area. D．His TV set had no signal.
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