软件水平考试

【单选题】Packet-switching wireless networks are preferable (41) when transmissions are (42) because of the way charges are (43) per packet.Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are (44) for the (45) of time they use the net-work.
A．long
B．short
C．large
D．small

网考网参考答案：B
网考网解析：
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