问题 问答题

【说明】
利用Windows Server 2008架设邮件服务器,回答相应问题。

【问题1】
邮件服务器通常提供POP3和SMTP两种服务,它们各有什么作用

答案

参考答案:POP3用于收邮件,SMTP用于发邮件。

解析:

[分析]:
POP(Post Office Protocol)是一种电子邮局传输协议,而POP3是它的第三个版本,是规定了怎样将个人计算机连接到Internet的邮件服务器和下载电子邮件的电子协议。它是Internet电子邮件的第一个离线协议标准。简单点说,POP3就是一个简单而实用的邮件信息传输协议,主要用于邮件的离线接收。
SMTP(Simple Mail Transfer Protocol)是简单邮件传输协议,它是一组用于从源地址到目的地址传输邮件的规范,通过它来控制邮件的中转方式。SMTP协议帮助每台计算机在发送或中转信件时找到下一个目的地。SMTP服务器就是遵循SMTP协议的发送邮件服务器,它主要用于邮件的发送及邮件服务器间的中转。

阅读理解

阅读理解。

     When their parents were children, they imagined a future standing in front of a class of pupils or doing the

rounds as a doctor.

     But today's British teenagers, a survey suggests, seem to have set their sights only on becoming the next

Leona Lewis or Wayne Rooney.

      Researchers questioned 3,000 teenagers about their ambitions and also asked parents about their youthful

career hopes.

     According to the survey, youngsters dream of a celebrity (明星) lifestyle, perhaps after finding fame

through shows such as the X Factor, and of being actors or sports stars.

     Copying the likes of Rooney and David Beckham was the top career ambition of today's teenagers,cited by

12 percent.

     Almost as many,11 percent, wanted to be pop stars, and the same proportion dreamed of being actors.

     The success of celebrity chefs such as James Oliver and Cor don Ramsay is likely to explain why becoming a chef is now the dream of 5 percent, a career ambition which did not figure in the list of 25 years ago.

      A quarter of a century back teaching was the top career choice, cited by 15 percent. These days the job is

chosen by only 4 percent.

     Of the traditional professions, only law has risen in popularity. The survey also suggests that more girls

dream of becoming doctors and boys want careers as astronauts or firefighters.

     Child psychologist Laverne Antrobus said the findings reflect today's celebrity culture and warned children

against unrealistic dreams.

     "Children see footballs, pop stars and actors on TV and their lives look exciting, glamorous and fun," she

said."It is hard for them to realize that, they are the end product of a lot of ingredients including talent,

determination and years of hard work. Wayne Rooney is not on the pitch by chance."

     As Antrobus pointed out, there is absolutely nothing wrong with children having big dreams, but" these have

to be based on reality," she said.

1. The study suggests today's British teenagers want to___ sports stars, pop stars and actors.

A. have the talent of

B. work as hard as

C. enjoy the celebrity lifestyles of

D. become successful by chance like

2. Which of the following statements is TRUE?

A.12 percent of British teenagers surveyed wanted to become chefs.

B. 22 percent of British teenagers surveyed wanted to be pop stars or actors.

C. None of the traditional professions are favored by today's British teenagers.

D. Teaching, though less popular, seems to remain one of the top career choices on the list.

3. According to Laveme Antrobus, the change in career ambitions___.

A. represents progress

B. mirrors today's celebrity culture

C. shows how realistic youngsters are

D. suggests British teenagers watch too much TV

4. What does the underlined sentence" Wayne Rooney is not on the pitch by chance." mean?

A. Wayne Rooney does not get to play much today.

B. Wayne Rooney didn't get into sport by chance.

C. Wayne Rooney doesn't believe in luck when he is playing.

D. Wayne Rooney didn't become successful by luck.

单项选择题