[单项选择]The company purchased several computers programmed to ______ the specific tasks required.


A. tackle
B. solve
C. assign
D. follow

[单项选择]The company purchased several computers programmed to ______ the specific tasks required.
A. tackle
B. solve
C. assign
D. follow

[单项选择]

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

[单项选择]One use of networks is to let several computers share ______ such as file systems, printers, and tape drives.
A. CPU
B. memory
C. resources
D. data

[单项选择]One use of networks is to let several computers (61) data such as file systems，printers，and tape drives．
A. copy
B. communicate
C. transfer
D. share

[单项选择]The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they ________.
A. were playing
B. were to play
C. have played
D. played

[单项选择]How many computers will the company ______this year


A. turn up
B. turn on
C. turn out
D. turn over.

[单项选择]How many computers will the company ______ this year
A. turn up
B. turn out
C. turn on
D. turn over

[单项选择]The company ______ many computers every year.
A. turns off
B. tums up
C. turns out
D. tums down

[单项选择]Programmed instruction received its major impetus from the work of behaviorist J. H. Skinner, who after years of research,______ a practical system in 1954.


A. described
B. derived
C. imitated
D. devised