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 more 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.
1.Most computer users want to know how the computer mouse works.
A.right B.wrong C.not mentioned
2.According to the author,general computer users need not know how the computer mouse was invented.
A.right B.wrong C.not mentioned
3.The computer mouse derives its name from the cable that goes out its body,which looks like the tail of a mouse.
A.right B.wrong C.not mentioned
4.The key components of a computer mouse are the two LEDs.
A.right B.wrong C.not mentioned
5.When an ordinary computer mouse gets dirty,it has to be replaced with a new one.
A.right B.wrong C.not mentioned
6.The most durable computer mice on sale are the IBM ones.
A.right B.wrong C.not mentioned
7.The optical mouse is superior to the basic one in that the former has no moving parts.
A.right B.wrong C.not mentioned
答案与解析：
1.分析文章标题：Computer mouse(鼠标)
2.直接解题：
1.Most computer users(使用者)want to(想要...)know how the computer mouse(电脑鼠标)works(工作).
A.right B.wrong C.not mentioned
1.B.细节题。利用问题句中涉及到修饰词的结构most computer users作为答案线索，在文章中查找答案相关句：
(第一段)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(使用)the computer mouse(与问题句中的most computer user呼应)daily(每天，每天的，日报)without(不，没有)stopping to(停下来去...)think how it works(工作，起作用)until(直到)it gets(变得)dirty(脏的，卑鄙的)and we have to(不得不)learn(学习)how to clean(使...干净，打扫)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.
文章第一段第三句说,大多数电脑使用者天天用电脑却没有想去了解鼠标的工作原理。由此可见问题句的内容与该句内容不一致，因此问题句没有提供正确信息。
考点：stop to do sth./停下来去...
比较：stop doing/停止...
提示：
问题句表示数量或范围的修饰词，如：all,any,whole,most,some等可能是判断答案的关键词。
2.According to(根据/依据)the author(作者),general(普通的，综合的，全面的)computer users(使用者)need(需要)not know(知道)how(怎样)the computer mouse was invented(被发明).
A.right B.wrong C.not mentioned
2.C.细节题。利用问题句中涉及到修饰词的结构general computer users作为答案线索，在文章中查找答案相关句：
(第一段)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.(第一题答案相关句)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(指代鼠标用户/与general computer users呼应)learn to point at(指向)things(东西)before(在...之前)we learn to(学会)speak(说话),so the mouse(鼠标)is a very natural(自然的)pointing(指方向的)device(设备).Other computer pointing devices include(包括)light pens(光笔),graphics tablets and touch screen,but(但是)the mouse still our workhorse(重负荷工作部件).
The computer mouse was invented(被发明)in 1964 by Douglas Englehart of Stanford University(斯坦福大学).As(随着)computer screens became popular(受欢迎的)and arrow keys were used to(被用于...)move(移动)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.(第3段)How does the mouse work(工作)?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.
文章中没有出现与问题句的内容相呼应的信息，因此判断问题句的内容在文章中没有被提到。
3.The computer mouse derives its name(名字，名称)from(从...中获得...)the cable(电缆)that goes out its body(身体),which looks like(看起来象)the tail(尾巴)of a mouse(老鼠).
A.right B.wrong C.not mentioned
3.A.细节题。利用问题句中的细节信息词cable和the tail of a mouse作为答案线索，在文章中查找答案相关句：
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 more 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.
(第3段)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(发光二极管)detects(察觉，探测)a changing(变换的)pattern(模式，图案)of light(光),converts the pattern into(把...转变成)an electronic(电子的)signal(信号),and sends(发送，寄，派遣)the signal to the computer(计算机)through(通过)wires(电线)in a cable(电缆)that goes out the mouse body.This cable is the tail(尾巴)that helps(帮助)give(给予)the mouse its name(名字).The computer interprets the signal to tell it where to position the cursor on the computer screen.
文章第2段倒数第2句，第3句信息与问题句信息一致，因此问题句提供了正确信息。
考点：代词结构指代内容+定语从句
4.The key(关键，钥匙，键)components(成分，部件)of a computer mouse are the two LEDs(二极管).
A.right B.wrong C.not mentioned
4.A.利用问题句中的饱含数字的特征结构two LEDs作为答案线索，在文章中查找答案相关句：
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 more 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(工作)?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(轮子，滚轮)have a pair of(一对，一双)small electronic(电子)light-emitting(发光的)devices(设备)called light emitting diodes(LED)mounted on either side(被安装在两侧的).(第7句)One LED(发光二极管)sends a light beam(光束)to the LED on the other side(在对面).As the wheels(轮子/滚轮)spin(旋转)and a hole(孔，洞)rotates by,the light beam(光束)gets through to(与...电话联系，达到)the LED on the other side(在对面).But a moment(瞬间)later(后来)the light beam is blocked(被阻塞)until the next(下一个的，下一次)hole is in place(在适当的位置).The LED(发光二极管)detects(察觉，探测)a changing(变换的)pattern(模式，图案)of light(光),converts the pattern into(把...转变成)an electronic(电子的)signal(信号),and sends(发送，寄，派遣)the signal to the computer(计算机)through(通过)wires(电线)in a cable(电缆)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.
以上答案相关句涉及到两个发光二极管在鼠标中的具体工作方式：二极管把光信号转换成电信号，传送到电脑。由此可看出二极管是鼠标中的关键部件。
考点：概括总结
5.When an ordinary(普通的)computer mouse(鼠标)gets dirty(脏的),it has to be replaced(不得不被替换)with a new one.
A.right B.wrong C.not mentioned
5.B.细节题。利用问题句中的含有修饰词的细节信息结构new one(new mouse)及另一个修饰词dirty共同作为答案线索作为答案线索，在文章中查找答案相关句：
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 more 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(设计)is that the mouse gets dirty as the ball rolls over(在...上面滚过)the surface(表面)and picks up(捡起,获得,加快)the dirt(灰尘).Eventually(最终)you have to clean(把...弄干净)your mouse.The newer optical mice avoid this problem by having no moving parts.
从答案相关句中可以看出鼠标脏了可以察干净再用，因此问题句提供了错误的信息。
考点：上下文之间的意义关系―条件与结果。
6.The most durable(持久的，耐用的)computer mice(鼠标)on sale(在销售的)are the IBM ones.
A.right B.wrong C.not mentioned
6.C.细节题。利用问题句中的含有修饰词的特征词IBM及涉及到形容词最高级结构的细节信息结构The most durable computer mice共同作为答案线索作为答案线索，在文章中查找答案相关句，结果发现这个两个结构在文章中均没有呼应的内容，因此判断该问题句的内容在文章中没有被提到。
提示：
如果问题句中出现了以比较级形式或最高级形式出现的形容词或副词结构，则往往可以利用这样的结构作为答案线索在文章中查找与问题句相关的内容。
7.The optical(光学的)mouse(鼠标)is superior to(优于...)the basic(基本的,普通的)one in that(因为)the former(前者)has no moving parts(运动部件).
A.right B.wrong C.not mentioned
7.A.细节题。利用问题句中细节信息词optical mouse,basic one(basic mouse),moving parts共同作为答案线索作为答案线索，在文章中查找答案相关句：
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 more 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(到目前为止)we have only discussed(讨论)the basic(普通的)computer mouse that most of you probably(可能)have or have used.One problem with(关于...的问题)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(避免)this problem by having no moving parts(运动部件).
文章结尾部分说光学鼠标因为没有运动部件，所以不会像普通鼠标那样吸附灰尘，由此可推断出光学鼠标优于普通鼠标。
考查：代词结构指代内容+推断
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 more 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.
1.Most computer users want to know how the computer mouse works.
A.right B.wrong C.not mentioned
2.According to the author,general computer users need not know how the computer mouse was invented.
A.right B.wrong C.not mentioned
3.The computer mouse derives its name from the cable that goes out its body,which looks like the tail of a mouse.
A.right B.wrong C.not mentioned
4.The key components of a computer mouse are the two LEDs.
A.right B.wrong C.not mentioned
5.When an ordinary computer mouse gets dirty,it has to be replaced with a new one.
A.right B.wrong C.not mentioned
6.The most durable computer mice on sale are the IBM ones.
A.right B.wrong C.not mentioned
7.The optical mouse is superior to the basic one in that the former has no moving parts.
A.right B.wrong C.not mentioned
答案与解析：
1.分析文章标题：Computer mouse(鼠标)
2.直接解题：
1.Most computer users(使用者)want to(想要...)know how the computer mouse(电脑鼠标)works(工作).
A.right B.wrong C.not mentioned
1.B.细节题。利用问题句中涉及到修饰词的结构most computer users作为答案线索，在文章中查找答案相关句：
(第一段)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(使用)the computer mouse(与问题句中的most computer user呼应)daily(每天，每天的，日报)without(不，没有)stopping to(停下来去...)think how it works(工作，起作用)until(直到)it gets(变得)dirty(脏的，卑鄙的)and we have to(不得不)learn(学习)how to clean(使...干净，打扫)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.
文章第一段第三句说,大多数电脑使用者天天用电脑却没有想去了解鼠标的工作原理。由此可见问题句的内容与该句内容不一致，因此问题句没有提供正确信息。
考点：stop to do sth./停下来去...
比较：stop doing/停止...
提示：
问题句表示数量或范围的修饰词，如：all,any,whole,most,some等可能是判断答案的关键词。
2.According to(根据/依据)the author(作者),general(普通的，综合的，全面的)computer users(使用者)need(需要)not know(知道)how(怎样)the computer mouse was invented(被发明).
A.right B.wrong C.not mentioned
2.C.细节题。利用问题句中涉及到修饰词的结构general computer users作为答案线索，在文章中查找答案相关句：
(第一段)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.(第一题答案相关句)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(指代鼠标用户/与general computer users呼应)learn to point at(指向)things(东西)before(在...之前)we learn to(学会)speak(说话),so the mouse(鼠标)is a very natural(自然的)pointing(指方向的)device(设备).Other computer pointing devices include(包括)light pens(光笔),graphics tablets and touch screen,but(但是)the mouse still our workhorse(重负荷工作部件).
The computer mouse was invented(被发明)in 1964 by Douglas Englehart of Stanford University(斯坦福大学).As(随着)computer screens became popular(受欢迎的)and arrow keys were used to(被用于...)move(移动)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.(第3段)How does the mouse work(工作)?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.
文章中没有出现与问题句的内容相呼应的信息，因此判断问题句的内容在文章中没有被提到。
3.The computer mouse derives its name(名字，名称)from(从...中获得...)the cable(电缆)that goes out its body(身体),which looks like(看起来象)the tail(尾巴)of a mouse(老鼠).
A.right B.wrong C.not mentioned
3.A.细节题。利用问题句中的细节信息词cable和the tail of a mouse作为答案线索，在文章中查找答案相关句：
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 more 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.
(第3段)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(发光二极管)detects(察觉，探测)a changing(变换的)pattern(模式，图案)of light(光),converts the pattern into(把...转变成)an electronic(电子的)signal(信号),and sends(发送，寄，派遣)the signal to the computer(计算机)through(通过)wires(电线)in a cable(电缆)that goes out the mouse body.This cable is the tail(尾巴)that helps(帮助)give(给予)the mouse its name(名字).The computer interprets the signal to tell it where to position the cursor on the computer screen.
文章第2段倒数第2句，第3句信息与问题句信息一致，因此问题句提供了正确信息。
考点：代词结构指代内容+定语从句
4.The key(关键，钥匙，键)components(成分，部件)of a computer mouse are the two LEDs(二极管).
A.right B.wrong C.not mentioned
4.A.利用问题句中的饱含数字的特征结构two LEDs作为答案线索，在文章中查找答案相关句：
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 more 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(工作)?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(轮子，滚轮)have a pair of(一对，一双)small electronic(电子)light-emitting(发光的)devices(设备)called light emitting diodes(LED)mounted on either side(被安装在两侧的).(第7句)One LED(发光二极管)sends a light beam(光束)to the LED on the other side(在对面).As the wheels(轮子/滚轮)spin(旋转)and a hole(孔，洞)rotates by,the light beam(光束)gets through to(与...电话联系，达到)the LED on the other side(在对面).But a moment(瞬间)later(后来)the light beam is blocked(被阻塞)until the next(下一个的，下一次)hole is in place(在适当的位置).The LED(发光二极管)detects(察觉，探测)a changing(变换的)pattern(模式，图案)of light(光),converts the pattern into(把...转变成)an electronic(电子的)signal(信号),and sends(发送，寄，派遣)the signal to the computer(计算机)through(通过)wires(电线)in a cable(电缆)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.
以上答案相关句涉及到两个发光二极管在鼠标中的具体工作方式：二极管把光信号转换成电信号，传送到电脑。由此可看出二极管是鼠标中的关键部件。
考点：概括总结
5.When an ordinary(普通的)computer mouse(鼠标)gets dirty(脏的),it has to be replaced(不得不被替换)with a new one.
A.right B.wrong C.not mentioned
5.B.细节题。利用问题句中的含有修饰词的细节信息结构new one(new mouse)及另一个修饰词dirty共同作为答案线索作为答案线索，在文章中查找答案相关句：
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 more 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(设计)is that the mouse gets dirty as the ball rolls over(在...上面滚过)the surface(表面)and picks up(捡起,获得,加快)the dirt(灰尘).Eventually(最终)you have to clean(把...弄干净)your mouse.The newer optical mice avoid this problem by having no moving parts.
从答案相关句中可以看出鼠标脏了可以察干净再用，因此问题句提供了错误的信息。
考点：上下文之间的意义关系―条件与结果。
6.The most durable(持久的，耐用的)computer mice(鼠标)on sale(在销售的)are the IBM ones.
A.right B.wrong C.not mentioned
6.C.细节题。利用问题句中的含有修饰词的特征词IBM及涉及到形容词最高级结构的细节信息结构The most durable computer mice共同作为答案线索作为答案线索，在文章中查找答案相关句，结果发现这个两个结构在文章中均没有呼应的内容，因此判断该问题句的内容在文章中没有被提到。
提示：
如果问题句中出现了以比较级形式或最高级形式出现的形容词或副词结构，则往往可以利用这样的结构作为答案线索在文章中查找与问题句相关的内容。
7.The optical(光学的)mouse(鼠标)is superior to(优于...)the basic(基本的,普通的)one in that(因为)the former(前者)has no moving parts(运动部件).
A.right B.wrong C.not mentioned
7.A.细节题。利用问题句中细节信息词optical mouse,basic one(basic mouse),moving parts共同作为答案线索作为答案线索，在文章中查找答案相关句：
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 more 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(到目前为止)we have only discussed(讨论)the basic(普通的)computer mouse that most of you probably(可能)have or have used.One problem with(关于...的问题)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(避免)this problem by having no moving parts(运动部件).
文章结尾部分说光学鼠标因为没有运动部件，所以不会像普通鼠标那样吸附灰尘，由此可推断出光学鼠标优于普通鼠标。
考查：代词结构指代内容+推断
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