计算机病毒英文文章有哪些
学习啦在线学习网计算机病毒英文文章有哪些
学习啦在线学习网 想学习下计算机病毒英文文章，有什么好推荐的吗?下面由学习啦小编给你做出详细的计算机病毒英文推荐介绍!希望对你有帮助!
计算机病毒英文推荐一：
学习啦在线学习网 John, Joanne & Justin
学习啦在线学习网 John: Help! I just found out that I have a virus on my computer!
学习啦在线学习网 Joanne: Oh, that's terrible.
Justin: Me too. That's why I have two anti-virus software installed.
学习啦在线学习网 John: I have Norton anti-virus installed too. But from a week ago, it stopped workig by itself.
学习啦在线学习网 Joanne: I didn't have anti-virus software installed, but I never get virus.
学习啦在线学习网 Justin: Really? How did you manage that, Joanne?
Joanne: I never connect my computer to the Internet. And I don't borrow other people's discs.
学习啦在线学习网 Justin: I see. So John, what are you going to do now?
John: I tried to re-install Norton several times, but every time it failed. So it seems I have to send it to the computer shop.
Joanne: I know a friend of mine is really good with computers. Maybe I can ask him to help you out?
John: That's so kind of you.
学习啦在线学习网 Justin: Oh in that case can you also ask him to check my computer? I want to install a third anti-virus software but don't know how.
学习啦在线学习网 Joanne: That's fine. I will ring him now.
学习啦在线学习网 Justin: Thank you, thank you.
John: I can wait for him at home any time he wants to come.
计算机病毒英文推荐二：
Computer Virus A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The original may modify the copies or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable medium such as a floppy disk, CD, or USB drive. Additionally, viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. A Trojan horse is a file that appears harmless until executed. In contrast to viruses,
学习啦在线学习网 Trojan horses do not insert their code into other computer files. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms. Furthermore, some sources use an alternative terminology in which a virus is any form of self-replicating malware. The term comes from the term virus in biology. A computer virus reproduces by making (possibly modified) copies of itself in the computer's memory, storage, or over a network. This is similar to the way a biological virus works. Some viruses are programmed to damage the computer by damaging programs, deleting files,
学习啦在线学习网 or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and perhaps make their presence known by presenting text, video, or audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss. There are many viruses operating in the general Internet today, and new ones are discovered every day.
计算机病毒英文推荐三：
We know the sounds of cities are loud enough to cause great harm to people's hearing in the U. S. One person out of twenty has got some hearing loss. And all over the world the situation is getting worse and worse all the time since the noise increases with the population.
With the development of machines, noise has also increased greatly in the 20th century. We live surrounded by loud planes, trucks and electric tools. TV sets and radios add up to 90 or J00 decibels, a certain unit used to measure the loudness of sound. A normal dialogue reaches 55 decibels; a plane goes to 100, and an ordinary train, reaching the station, can be twice as loud as the loudest plane. Disco music reaches about 118. At decibels the ear stops hearing sound, and pain starts. How terrible if things go on like this!
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