根据文中第三段第五到第七句"Computer users have to pay the hackers some money to unlock those files…have taken millions of dollars from people"电脑用户需要给黑客钱才能解锁这些文件,解锁文件的价格从300美元到600美元不等,据说黑客们就此谋取了百万美金,因此可以推断黑客们用这个勒索病毒来谋取钱财。因此...
A computer virus is a computer program that can copy itself and infect(传染) a computer without permission or knowledge of the user and runs against his/her wishes.All computer viruses are man-made.Here are some virus prevention tips.Do not open any files(文件) attached to an e-mail from...
30.D 细节理解题.根据第一段中A computer virus is a computer program和All computer viruses are man-made可知,计算机病毒是一种人造的计算机程序.故选D. 31.B 细节理解题.根据第五段If you are uncertain,don't download the file at all or download the file to a floppy and test it with your own...
A computer virus is a malicious piece of computer code designed to spread from device to device. A subset of malware, these self-copying threats are usually designed to damage a device or steal data. Think of a biological virus – the kind that makes you sick. It’s persistently nasty, k...
Computer viruses run according to our wishes D. A computer virus is a program or piece of code. 3. When we use e-mail, we should. A. open all the files we receive B. open any file even if we don’t know what it is C.
Computer viruses run according to our wishes,A computer virus is a program or piece of code.,A computer virus is a kind of worm,Not all computer viruses are manmade,Computer viruses run according to our wishes,A computer virus is a program or piece of code.,open all the files we ...
A computer virus is a program that is able to copy itself when it is run. In addition to copying itself, a computer virus can also cause harm.It may delete files or some important information in the computer.Besides, it may make the computer work more slowly. There are many different ...
A computer virus is a type ofmalwarethat attaches itself to a program or file. A virus can replicate and spread across an infected system and it often propagates to other systems, much like a biological virus spreads from host to host. Once a virus has infected a system, it can attach ...
File Infector Virus A file infector virus spreads by infecting the file system in the operating system (for example, COM, EXE, DOC, and SYS). It is embedded in the source files of a computer. The virus spreads as soon as such a file is operated. Macro virus is a typical type of fil...
A computer virus is an ill-natured software application or authored code that can attach itself to other programs, self-replicate, and spread itself onto other devices. When executed, a virus modifies other computer programs by inserting its code into them. If the virus’s replication is success...