21春南开《大学英语3》第八单元(2)复习指导
《大学英语3》第八单元 拓展资料
1. The Internet : is a computer network made up of thousands of networks worldwide. No one knows exactly how many computers are connected to the Internet. It is certain, however, that these number in the millions and are increasing at a rapid rate.2. A computer virus: is a program that invades your computer system, hides there, and makes copies of itself. Viruses spread when you launch an infected application or start up your computer from a disk that has infected system files.
All computer viruses are manmade. A simple virus that can make a copy of itself over and over again is relatively easy to produce. Even such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt.
It is highly recommended that you have Virus Protection installed in your computer before you consider downloading anything.3. Melissa: Melissa affects Word documents. If launched, the macro virus will attempt to start Microsoft Outlook to send copies of the infected document via email to up to 50 people in Outlook’s address book as an attachment.
The email subject line reads "Important Message from ," and the message reads "Here is that document you asked for...don't show anyone else ;-)". 4. The Love Bug virus: The Love Bug virus is also called the Loveletter Virus, or simply I Love You.
The virus is circulating through email and affecting many customers. If run, the virus could overwrite .jpg, .mp3, and other file types, and attempt to send a copy of itself to everyone in the recipient's address book.
The e-mail containing the virus typically carries a subject line of "ILOVEYOU". Inside the mail is a short message saying "Kindly check the attached LOVELETTER coming from me" and an attachment named LOVE-LETTER-FOR-YOU.txt.vbs.
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