题目内容

下面关于域名的说法正确的是( )

A. 域名专指一个服务器的名字
B. 域名就是网址
C. 域名可以自己任意取
D. 域名系统按地理域或机构域分层采用层次结构

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FTP协议的缺省端口号是( )

A. 21
B. 23
C. 25
D. 29

下列不是网络操作系统的是( )

A. Windows Server 2008
B. Linux
C. UNIX
DOS

Web服务通过( )协议来建立连接。

A. FTP
B. IP
C. HTTP
D. WWW

The following is a list of key points of a letter of invitation. You are required to find their Chinese equivalents.()1. State who is invited and what kind of event will be held.()2. State the occasion, date, time, and place.()3. State what kind of expenses will be covered.()4. Provide a phone number or an e-mail address as well as the deadline by which to reply if you need a response.()5. Express that you are looking forward to seeing the person.A. 表达盼望之情B. 说明活动的日期、时间、地点C. 提供电话或邮箱地址,如果需要对方回复还需说明回复的截止时间D. 陈述受邀人和举办的活动E. 说明所承担的费用

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