A(75) is a device that enables data from one computer to travel to another computer by u

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A(75) is a device that enables data from one computer to travel to another computer by using telephone lines.

(75) A. modem

B. disk

C. printer

D. CPU

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗