What can be inferred from the fourth paragraph？A．Farm areas accept waste from the city in

A．Executable

B．Trojan

C．Virus

D．Worm

A．Virus

B．Worm

C．Trojan

D．Executable

How do you know that your computer is infected？

You know it by______________ your computer for virus with a software program.

根据以下材料回答 56～60 ：

第 56 题 What should you do to protect your computer from a virus？

You must make sure that you have an______________.

What will happen if the virus is very severe？

Your computer will be_________________.

es before they are able to harm a computer or server networked system.

A．Anti

B．Invade

C．Inroad

D．Aggression

Which of the following about a computer virus is not true？

A．It is a piece of software whose purpose is to replicate.

B．It is a program that gains control over its host in various ways.

C．It all contains code which won't be activated without a trigger mechanism.

D．It sometimes attaches to a file.

We can infer from the last sentence of the passage that ______.

A．Turnitin's anti-plagiarism software can be well-accepted by Harvard University

B．the anti-plagiarism software may create some computer virus which is like nuclear bomb in Harvard University

C．there must be much academic cheating in Harvard University' in Dr. Barrie's opinion

D．Harvard University will adopt the software in a short time

We can infer from the last sentence of the passage that ______.

A．Turuitin's anti-plagiarism software can be well-accepted by Harvard University

B．the anti-plagiarism software may create some computer virus which is like nuclear bomb in Harvard University

C．there must be much academic cheating in Harvard University in Dr. Barrie's opinion

D．Harvard University will adopt the software in a short time

a 400-Mhz Pentium III, and has 128 MB of RAM and a 10-GB hard disk. You are performing the installation by using the Windows 2000 Professional CD-ROM. After the text mode installation portion is complete, you restart the computer. The BIOS virus checker on your computer indicates you're your computer is infected with a Master Boot Record virus.

What should you do before you continue the installation？

A．Remove the virus checker in Windows 98.

B．Disable the BIOS virus checker and restart the computer.

C．Run Fixmbr.Exe from the Windows 2000 Professional CD-ROM.

D．Modify the Boot.ini file to include a signature parameter on the ARC path of the system partition.