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计算机
Packet-switching wireless networks are preferable(71)when transmissions are(72)because of the way charges are(73)per packet. Ci
Packet-switching wireless networks are preferable(71)when transmissions are(72)because of the way charges are(73)per packet. Ci
admin
2009-05-15
19
问题
Packet-switching wireless networks are preferable(71)when transmissions are(72)because of the way charges are(73)per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are(74)for the(75)of time they use the network.
选项
A、point
B、start
C、length
D、end
答案
C
解析
无线分组交换网只有(only)在短(short)时间传输时才能体现其优越性,这是因为它的计费方式是按每个分组收费(incurred)。电路交换网则适用于大型文件传输或其他长传输,因为对客户是按他们使用网络的时间长度(length)来收费(charged)的。
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