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軟題庫 學習課程
試卷年份2020年下半年
試題題型【單選題】
試題內(nèi)容

因特網(wǎng)中的域名系統(tǒng)(Domain Name System)是一個分層的域名,在根域下面是頂級域,以下頂級域中,(  )屬于國家頂級域。
A.NET
B.EDU
C.COM
D.UK

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