1.Match the explanations in Column Bwith words and expressions inColumn A.(搭配每组意义相同的词语或短语)

  2.Choose the proper words to fill in the blanks (选词填空)                            Tvpes of Cpmputer

        computer can be generally classified by size and powers as following,there is considerble overlap among them.

         A (minicomputer)refers to a small ,single-user computer based on a microprocessor,with a keyboard for entering data ,a monitor for displaying information,and a storage device for saving data .

         A (personal computer)is a powerful ,single -user computer,which,thoughlooking lik amicrocomputer,has a more powerful microprocessor and a hinger-quality monitor .

         A (workstation)stands as a multi-user computer capable of supporing from 10 to hundreds of terminals（终端）or users simultancously(同时地).

        A (mainframe)，syonymous with ''giant"，is -the name for a  powerful multi-user computer which supports hundreds of user at the same time.

        A(suupercomputer)describes an extremly fast computer that can perform hundreds of millions of instructions per second.

Words to be chosen from：(可选词)

Supercomputer 、minicomputer、mainframe、workstation、personal computer

3.translate the following english phrases or sentences into chinese.(将下面英语短语或句子翻译为中文)

PersonalComputer.（个人电脑）

This is display.Thedisplay is on the system unit.（这是显示器，显示器在系统单元上）

That is a printer.The printer is by the display and system unit.（那是一台打印机，它由显示器和系统单元组成）

This is a disk drive.The disk drive is in the system unit.（这是磁盘驱动器，磁盘驱动器在系统单元中）

This is a keyboard,and that is mouse,The keyboard and mouse are before the system and display.（这是一个键盘，也就是鼠标，键盘和鼠标在系统和显示器之间）

That is modem,The modem is by the system unit,too.（这就是调制解调器，调制解调器也是由系统单元组成提供的）

Theyare basic hardware computers of a personal computer system.（他们是个人计算机系统的基本硬件计算机）