In today’s world, we rely on computers as never before. They are used for everyt

In today’s world, werely on computers as never before. They are used for everything from ordering apizza to running hospitals and military defense systems. Banking and creditcard information is stored and accessed by computers. So what happens when acomputer gets infected with a virus? One effect is that people’s access totheir e-mail accounts is cut off. A more serious possible consequence is thatbillions of dollars could be lost.

A virus is a computerprogram that copies itself onto other programs and infects them. Similar to aneasily spread disease, a computer virus goes from computer to computer, eitheradding to or changing the tasks a program is designed to do.

The first computerviruses were created in the mid’80s and had varying effects. Some caused filesto be deleted, or made the letters on the screen appear to fall off. Othersdisplayed a specific message once the computer was turned on.

Viruses today are muchmore widespread and dangerous than ever before. Perhaps the most damaging hasbeen the “I Love You” virus. “I Love You” appeared in May 2000 and has possiblybeen the most destructive virus in terms of monetary loss.

The virus is released（释放） when an attachment（附件） to a fake e-mailmessage is opened. By changing the names of files on computers, “I Love You”makes them difficult to access. It also searches for important personalinformation, including passwords, which it sends to a Web site for others tosee.

It is estimated thatmore than 45 million people in 20 countries have had their computers infectedby the “I Love You” virus. Some say the cost of repair and lost business hasbeen more than US$10 billion.

If you own a computer,it is important to keep it in good health by installing（安装） an anti-virus program. If updated frequently, it willprotect your e-mail access-----not to mention your wallet.

51. What does “virus”mean in the article?

A. An easily spreaddisease.

B. A contagious (传染的) computer program.

C. An extremely smallorganism（微生物）which causes disease.

D. A parasite（寄生虫）in computer.

52. How dose “I LoveYou” virus spread?

A. It is spread when ane-mail account is opened.

B. It is spread throughon-line chatting.

C. It is spread throughe-mail.

D. It spread from website to web site.

53. Which of thefollowing is one of the damages brought by “I Love You” virus?

A. It deletes files.

B. It automaticallyturns on computers.

C. It automaticallyturns off computers.

D. It makes itdifficult to access files.

54. Which of thefollowing is the best way to guard against virus?

A. To load anup-to-date anti-virus program into our computer.

B. Not to use an e-mailaccount.

C. To upgrade ourcomputer.

D. Not to use theInternet.

55. What is the purposeof the article?

A. To warn us againstvirus.

B. To remind us theimportance of being healthy.

C. To stress theimportance of computer.

D. To alert us toeconomic loss.

试题答案

【答案】

 B

 C

 D

 A

 A

【解析】