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885 sec 14-18
18.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. (A) so too are modems, they are the devices to allow (B) so too are modems, the devices that allow (C) so too modems, the devices allowing (D) also modems, they are the devices that allow (E) also modems, which are the devices to allow
key: b请问so too 是什么用法?
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