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  3. 共用题干 Computer Mouse The basic computer mouse is______(51)amazingly clever in...

共用题干 Computer Mouse The basic computer mouse is______(51)amazingly clever in...

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问题 共用题干
Computer Mouse The basic computer mouse is______(51)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（滚动）on the page with the newer mice with the wheel.Most of us use the computer mouse daily without stopping to think how it______(52)until it gets dirty and we have to learn how to______(53)it.We learn to point at things______(54)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_____(55)in 1964 by Douglas Englehart of Stanford University.As computer screens became more popalar 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_____(56)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 the mouse ball in the bottom of the mouse rolls over the mouse pad,it presses against and turns two shafts（轴）.The shafts are connected to wheels with several small holes in them.The wheels have a pair of small electronic light-emitting devices______(57) light-emitting diodes(LED)mounted on either side.One LED sends a light beam to the LED on______(58)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______(59)the light beam is blocked until the next hole is in place.The LED______(60)a changing pattern of light, converts the pattern______(61)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______(62). So far we have only discussed the basic computer mouse that______(63)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.______(64)you have to clean your mouse.The newer optical mice______(65)this problem by having no moving parts.
选项 53._________
A:clear
B:clerk
C:clean
D:check
答案C
解析前面并没有提到过电脑鼠标，这里是泛指，又由于空格后的单词读音由元音音素开头，故选B项。the 是定冠词，特指已提到的人或物；an 是不定冠词，用在以元音音素开头的可数名词前，表示“一个”;a也是不定冠词，用在不是以元音音素开头的可数名词前，也表示“一个”。
这里表示：我们虽然每天都在用鼠标，却没人会思考鼠标是怎么工作的。make制造，制作；do做，干；get得到，收到；work工作，运作。
由空格前的“it gets dirty”可知，空格处应为clean。clear清楚的，明白的，清晰的；clerk店员，职员，办事员；dean清洁，清理；check检查，核对。
按照人类生长的一般规律，学习用手指指东西理应发生在学习说话之前。before在……之前，先于；after在……以后；until到……为止；u沮ess除非，如果不。
鼠标是一项发明创造，而不是一项发现。find发现，找到，发觉；make制作，制造；discover发现；invent发明，创造。
依照逻辑推理，电脑鼠标的引人应该是为了使电脑完成日常任务。四个介词中只有for能够表示目的。
called在这里是“被称作”之意。这句话的意思是电子发光设备被人们称为LED,A项符合题意。
根据空格前一句提到的either可知，滚轮总共有两边，两者中的另一个应用the other来表示。other与复数名词连用，与others表示相同的意思。
later表示一段时间以后，是英语中的习惯用法。late晚的，迟到的，晚期的；Iater一段时间以后；after在……之后；when当……时候。
这里说的是LED的一种功能，即它能探测光线模式的改变。detect探测，发现；develop发展，开发；relieve解除，缓解；support支持，帮助，支撑。
convert…into…是固定短语，表示“把某事物转化为另一事物”。
此处表示的是“给电脑屏幕上的光标定位”。desk书桌，办公桌；table餐桌，目录；screen屏幕；mouse鼠标。
电脑鼠标应该是大多数人都用过的，故选most。much许多，与不可数名词连用；whole全部的，所有的，完整的；most大多数的，大部分的；few不多，很少。
鼠标变脏后，最终要清理，这里用eVentually来表示。comPletely完全地，彻底地；eventually最后地，最终地；specially特别地，特意地；particularly特别，尤其。根据题意，应选B。
结合上下文语境可知，光学鼠标避免了鼠标变脏的问题。ban禁止；avoid避开，避免，防止；allow允许，承认，准许；adapt使适应，使适合。
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