W网system information message中哪一条消息可以看到上行干扰？（)

exchange cards with others, you'll feel out of time and start at a disadvantage if your card hasn't an E-mail address on it.

M: I wouldn't be surprised, because, you know, it's the easiest way to communicate with other users over a network.

W: Is it？ But I was told that we must set up an E-mail system on the network before we can communicate with other users. Is that true？

M: Yes, it's not tough to create such a system. However, you need some hardware and software to support it.

W: Let me know the hardware needed first.

M: A computer and a line that connects your computer with the Internet.

W: All right. I was told that I need an account for my E-mail. Where can I get it？

M: You can contact an ISP, I mean an Internet Service Provider, to get an account.

W: How much do I have to pay for it？

M: It varies. You can also get a free E-mail account if you don't have to consider too much for the security of your mails. I know many people prefer free E-mails and they say their correspondence through that kind of account doesn't involve commercial information needed to be strictly kept secret. You can get such a free account simply at home if you have got access to a website with such a service.

W: It's so convenient. I may prefer the free E-mail. What about the software？

M: You don't need any additional software. Just the IE, the Internet Explorer, bound with Windows, the operating system.

W: Thank you so much for your help.

Questions 19 to 22 are based on the conversation you have just heard.

19. According to the man, why is E-mail so popular？

20. Which is the disadvantage of a free E-mail account？

21. What is the necessary software to support the E-mail system？

22. What will the woman probably do after the conversation？

(23)

A．Everybody's talking about E-mail nowadays.

B．If you don't have one, you will be out of time.

C．It's the easiest way to communicate with other users.

D．It's printed on every card people exchange with others.

A.packaging

B.transportation

C.storage

D.distribution processing

A.Data classification

B.Information ownership

C.Change control

D.System design

g in a burning building.

A．dwellers

B．residents

C．clients

D．invalids

Putting patient information in databases and online ______.

A．enables more Americans to join the health care system

B．contributes to the passage of health care reform

C．increases the burden of the U.S. health care system

D．changes how people seek and receive health care

XP每个分区下都有个System Volume Information名的隐藏目录是做什么的？

A.show chassis

B.show uptime

C.show system information

D.show time

algorithm, which serves to realize whole network clock synchronization.

Which of the following statements reflects the information in the passage？

A．The educational system and its administrators are partly to blame for the rise in the cheating.

B．The student who cheats must be at fault because the system is correct.

C．The 1960s vision of changing the world led students to conform.

D．Punishment for cheaters has always been severe in this country.