The computer, working very fast, _________data at the speed of light.

A． handles

B． handling

C． handled

D． has handled

[单选题]C．omputer systems consist of two very different types of elements:(71 ) , which includes all the physical things that can be touched and Software, which tells the hardware how to do.A．Operating systemB．I/O devicesC．CoursewareD．Hardware

[单选题]C．omputer systems consist of two very different types of elements: Hardware, which includes all the physical things that can be touched and(71)which tells the hardware how to do.A．Operating systemB．I/O devicesC．CoursewareD．Software

[单选题]Time _____ very fast and a new year will begin soon.A.takes offB.goes byC.p

[单选题]Time _____very fast and a new year will begin soon.A.takes offB.goes byC.pu

[单选题]( )is the sending and receiving of the message by computer.It is a fast， lo

[单选题]( )is the sending and receiving of the messages by computer.It is a fast， l

[单选题]The computer center，( )last year，is very popular among the students in this

[单选题]The computer center，( )last year，is very popular among the students in this

[单选题]A． ______ computer is a personal computer whose hardware is capable of using any or all of the following media in a program, text, graphics, video and animation.A．databaseB．multimediaC．networkD．mainframes

[单选题]A computer virus is a computer program that is created to make and spread (72) of itself.(72) A．programsB．virusC．copiesD．files