题目内容
（请给出正确答案）
[主观题]
Packet-switching wireless networks are preferable（41)when transmissions are（42)because of
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．to
B．for
C．than
D．only
提问人：网友distends
发布时间：2022-01-07
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