Computers are becoming faster, more powerful, and more reliable, and so too are modems, they are the devices to allow two or more computers to share information over regular telephone lines.
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Aso too are modems, they are the devices to allow
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Bso too are modems, the devices that allow
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Cso too modems, the devices allowing
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Dalso modems, they are the devices that allow
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Ealso modems, which are the devices to allow
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正确答案: B