初二英语(广州牛津8A课本)Unit3ModernmachinesReadingB.doc

B More information about computers
How do we give a computer instructions?
We give a computer instructions by putting different programs into it."Computer programmers" write computer programs.It is essential for these people not to make mistakes.Otherwise,the computer will not work well.
A computer needs different programs to do different jobs.For example,playing games,writing letters and drawing pictures all need different programs.There are also different languages for different programs.To write a program,people need to know this language.Sometimes a computer programmer may know many different languages.However,computer languages are not spoken different languages like Chinese or English but written languages.Also,only the computer and the programmer can understand them!

CD-ROMs and DVD-ROMs
Many computers have CD-ROM or DVD-ROM drives.A CD-ROM can hold over 300,000 pages of writing,and may also contain pictures and sounds.A DVD-ROM can hold even more information.So ,you can use them on your computer to read about the most famous people in the world today.You can also see photographs or videos of people,and even listen to them speaking.According to some people,CD-ROMs and DVD-ROMs will become even more popular than books

单词表
Vocabulary                                   Notes
hardly          adv. 几乎不
unaware       adj. 不知道;未察觉
dependent    adj.依靠的;受..影响的
type           v. 打字;键入
diagram        n.图表;示意图
operate         v.操作;使运行
railway         n.铁路;铁道
fly             v.驾驶;操纵
judge           n.法官;审判官
raise           v.引起;使出现
instruction       n.指示;命令
program         n.程序;指令
essential       adj.极其重要的
mistake         n.错误
CD-ROM       n.只读光盘
DVD-ROM     n.数字只读光盘
drive          n.驱动器
old           v.容纳
video          n.录像
ballpoint       n.圆珠笔
keyboard       n.键盘
supply         n.供应;补给
company       n.公司
reference       n.标识;编号