What'sthecompletionofi/ointhedailyletter?Iguessthat's“ifnot”forshort,butthereseemedtobewrong;(

题目详情

What's the completion of i/o in the daily letter?
I guess that' s “if not” for short,but there seemed to be wrong;(

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答案和解析

I/O 是计算机术语,是指输入设备和输出设备
input/output

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