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
自考
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
2013-09-17
46
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 thing 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 screen, but the mouse still our workhorse.
The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became 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 mouse ball. As the 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 detects 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 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 the dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.
People began to rely on the mouse for routine computer tasks ever since Stanford University invented computer mouse.
选项
A、真
B、假
C、Not Given
答案
B
解析
利用题干句中的特征词Stanford University作为线索,在文中查找到相关句“Thecomputer mouse was invented in 1964 by Douglas Englehart of Stantbrd University.”但是再利用另一个特征词routine computer tasks作为线索,在文中查找到相关句“The introduction of themouse,with the Apple Lisa computer in 1983,really started the computer public on the road to relying onthe mouse for routine computer tasks.”因此可以判断,题干句所给的信息有误。
转载请注明原文地址:https://kaotiyun.com/show/fpAR777K
本试题收录于:
英语(二)题库公共课分类
0
英语(二)
公共课
相关试题推荐
产品生产与库存系统数据库E—R图如题43图所示。写出关系数据库逻辑模型,并用下划线标志主码。
InMarch2004,JoeRyangotanoticefromabillingagencyforahospitalnearDenver,Colorado.Thehospitalwantedpaymentfors
Thegovernmentisplanningto______(simple)thetaxlaws.
Weallbelievethatmodemtechnologycanmakelifebetterbecauseitmakeseverythingfaster.Butby(11)______everythingup,
She______everythingelseandconcentratedonthetaskbeforeher.
Anewcomputercostsabout______ofthisusedone.
Johnistheoneofthestaffmemberswho______tobetransferred.
Itisnoteasytodecidewhetherareportistrueornot.OnereportofanunidentifiedobjectcamefromaBritishaeroplaneon
PromiseLastyearmy9-year-olddaughterwasseverelydehydratedfromrunninga1.5milesatschoolin100℉weather.Weto
Onedayafewyearsagoaveryfunnythinghappenedtoaneighborofmine.HewasateacheratoneofLondon’sbigmedicalschoo
随机试题
审判监督程序与二审的区别有()等。
下列有关预算编制方法的表述中,不正确的是()。
根据下列材料要求,请运用所学实用文体写作知识,代拟一份公文。鉴于企业拖欠银行利息问题的严重性,2006年1月6日,中国人民银行向国务院作了依法清收拖欠银行利息汇报,并建议转发各地区、各部门,其中还提出了相关应对措施:(一)落实清收利息目标责任制
日前,IBM公司研发的电脑沃森战胜了美国电视智力节目《危险边缘》的两名人类常胜将军,一时间,很多网友担心,电脑越来越像人了,将会超越人类智慧。从深蓝到沃森,人工智能又向前跨越了一大步。电脑会代替人脑吗?近几年,每次有电脑战胜人脑的事发生,都会有“终结者”之
2007年6月,洞庭湖水位迅速上涨,淹没了大片湖洲、湖滩,栖息于此的大约20亿只田鼠浩浩荡荡地涌人附近的农田,使洞庭湖沿岸的岳阳、益阳遭遇了20多年来损失最为惨重的鼠灾。专家分析说,洞庭湖生态环境已经遭到破坏,鼠灾敲响了警钟。下列的选项如果为真,都能支持专
【农业革命】
Nexttimeyoufeeltheflucomingon,thinktwicebeforereachingforpainkillers—theycoulddomore【C1】______thangood.Witht
关于I/O系统的描述中,正确的是______。
Educationofexceptionalchildrenmeansprovisionofspecialeducationalservicestothosechildrenwhoareeitherhandicappedo
中国一个幅员辽阔、资源丰富、历史悠久的多民族国家,每个民族都有其独特的丰富菜肴。地域菜系在地理环境、气候、文化传统、民族风俗和其他因素的影响下经过悠久历史的发展已经成形。最有影响力、最具代表性的是鲁、川、粤、闽、苏、浙、湘、徽菜系,这八种被人们称为“八大菜
最新回复
(
0
)