首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Computer Mouse The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to p
Computer Mouse The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to p
admin
2012-07-30
32
问题
Computer Mouse
The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. we learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screens, but the mouse is still our workhorse.
The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983, really started the computer public on the road to relying on the mouse for routine computer tasks.
How does the mouse work? we have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As me mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes(LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detect a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out of the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen.
So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
Most computer users want to know how the computer mouse works.
选项
A、Right
B、Wrong
C、Not mentioned
答案
B
解析
题句的意思是大多数计算机使用者都想了解鼠标的工作原理。这与短文的介绍不符。短文第一段第三句说,大多数计算机使用者天天用计算机,却没有想到要了解一个鼠标的工作原理。题句的信息是错误的,故答案为B。
转载请注明原文地址:https://jikaoti.com/ti/L3msFFFM
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
Theirbusinesswassuccessfulastheynowhadacompatibleboardofdirectors.
Sinceabout1970,newresearchhashelpedbrainscientistsunderstandstheseproblemsbetter.Scientistsnowknowtherearemany
Accordingtotheauthor,informationtechnologyhasnothingpositivetosay.Bytheterm"computerization"theauthormeanstha
Hedecidedtoovercomehisshortcomings.
BecauseofOden’suniqueness,heisalwaysperforminginthespotlightandsubjecttopublicscrutiny.
Thesteadilyrisingcostoflaboronthewaterfronthasgreatlyincreasedthecostofshippingcargobywater.
EveryDogHasItsSayKimikoFukuda,aJapanesegirl,alwayswonderedWhatherdogwastryingtosay.Wheneversheputonmak
Theconclusioncanbededucedfromthepremises.
ObesityCausesGlobalWarmingThelistofillsattributabletoobesitykeepsgrowing:Eastweek,obesepeoplewereaccusedo
Accordingtothepassage,avolcanosendsoutWhenlavacools,itbecomes
随机试题
简析《哈姆雷特》的艺术特点。
中期引产后应( )
下列不属于剂型变化的两首方剂是
由于操作风险的成因及后果的多样性,因此在进行损失数据收集的时候,很难做到数据的标准化。()
理财资金使用的重要原则包括()。
A公司是一家A股上市公司,母公司为P公司。A公司2×15年发生如下交易和事项:(1)2×15年7月1日,A公司发行股票10000股向母公司(P公司)购入其所持有的C公司的全部股权,并在个别财务报表中将其全额计入对C公司的长期股权投资,A公司股票每股面值为
下列不属于课堂常规的是()。
参观教学法可分为()
①特别是我们党在长期执政的条件下,如果对领导干部运用权力不加制约,就会使一些意志薄弱者滥用手中的权力②只有强化对权力的制约,才能防止权力腐败,保证领导干部正确使用权力③权力制约,就是权力所有者运用各种有效途径,对权力行使者所形成的特定的限制与约束④由
色盲也能成为天文学家么?事实上,天文学家日常所分析的照片多数都是黑白的,我们在杂志和其他彩色印刷品上看到的五彩缤纷的天文照片,其实也是通过把多张望远镜拍摄的不同波段的黑白照片加工合成而来的。而且这些波段未必都在人类可见光的范围内,所以即使对于视力正常的人来
最新回复
(
0
)