题目内容

下面是PC机采用ADSL方式接入互联网时的示意图:
上图中①和②应分别选择哪两种设备?

A. 集线器、电话机
B. ADSL MODEM、ADSL转换器
C. 电话机、ADSL MODEM
D. ADSL MODEM、电话机

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