单选题:为实现以ADSL方式接入Internet,至少需要在计算机中内置或外置的一个关键硬设备是(  )。

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题目内容:
为实现以ADSL方式接入Internet,至少需要在计算机中内置或外置的一个关键硬设备是(  )。 A.网卡
B.集线器
C.服务器
D.调制解调器(Modem)

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