A computer virus ______.A．is the same as a biological virusB．is also an organismC．is a ser

A computer virus ______.

A．is the same as a biological virus

B．is also an organism

C．is a series of electronic commands

D．is one of biological viruses

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更多“A computer virus ______.A．is t…”相关的问题

第1题

The virus can affect the computers in the computer system by ______.A．turning off the powe

The virus can affect the computers in the computer system by ______.

A．turning off the power

B．making them copy itself

C．sending them copies of itself

D．sending them some destructive ordens directly

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第2题

Recently, several thousand computers in the United States were attacked by a virus. The co

mputers were slowed or shut down. But no information was lost. A computer virus is similar to a biological virus--an organism (生物体) that can harm the human body. A computer virus is a series of electronic commands that can harm a computer or the information in the computer. It infects the device (设备) secretly. It tells the computer to do something the computer's owner does not want it to do. For example, a virus could enter a bank's computer system. It might tell the system to destroy all information about money belonging to everyone with the first name United States several months ago. The virus was created by a university student studying computer science. The computers affected by the virus were in major universities, government agencies (政府机关) and private (私人) companies. They were part of a United commands in a computer at his school. The computer sent the commands to other computers through the linked telephone lines.

The virus told each computer to make many copies of itself. Within a few minutes, all the computers' power was being used to make copies of the virus. The computer could do no other work. It finally slowed down greatly, or simply stopped working. Computer experts spent many days trying to destroy the virus in the computer system.

The experts agree the virus could have been much worse. They say it could have sent orders to destroy huge amounts of electronic information.

Many experts believe, the recent computer virus showed the need for better computer security (安全). But that is a problem. The affected system provides a free exchange (交换) of ideas and information among universities, private companies and government offices. Increasing security too much would destroy this exchange. It would slow progress on many important research projects.

Which of the following statements is true？

A．Many computers were attacked by a virus in the U. S.

B．Many computers attacked by a virus in the U.S. lost their information.

C．A computer virus can harm human body.

D．A computer virus can help the computer owner do many things.

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第3题

计算机病毒（Computer Virus ）可以定义为： “编辑或者在微机程序中插入的破坏微机功能或者破坏数据，影响微机使用并且能够自我复制的一组微机指令或者程序代码。（）

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第4题

某种电脑病毒（computer virus）传播非常快，如果一台电脑被感染，经过两轮感染后就会有81台电脑被感染。请问经过三轮感染后，被感染的电脑有多少台（）

A.648