2015职称英语考试理工类AB级阅读判断(5)

　　Computer Mouse

　　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.

　　with several small holes in them.The wheels have a pair of small electronic light-emitting devices called light-emitting diodes mounted on either side4.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.

　　词汇：

　　mouse pad 鼠标垫板 graphicsn.图形，图表5tAblitp

　　workhorsen.重负荷丁作部件 shaftn.轴，杆状物

　　cursorn.光标 opticaladj.光学的

　　1.copying and pasting：复制和粘贴

　　We stopped to rest for a while.我们停下来休息一会儿。

　　3....started the computer public on the road to relying on the mouse for routine computer tasks：使广大电脑用户开始踏上一条依赖鼠标完成常规电脑工作的道路。computer public：电脑公众。road to中的to是介词，所以后接动名词relying。

　　5.So far we have only discussed the basic computer mouse that most of you probably have or have used：到目前为止，我们只限于讨论基本型的电脑鼠标，你们中间多数人也许拥有一个鼠标，也许你们已用过鼠标。

　　1.Most computer users want to know how the computer mouse works.

　　2. According to the attthor，general computer users need not to know how the computer mouse was invented.

　　3.The computer mouse derives its name from the cable that goes out its body，which looks like the tail of a mouse.

　　4.The key components of a computer mouse are the two LEDs.

　　5.When an ordinary computer mouse gets dirty，it has to be replaced with a new one.

　　6.The most durable comptner mice on sale are the IBM ones.

　　7.The optical mouse is superior to the basic one in that the former has no moving parts.

　　答案与题解：

　　2.C 题句表达的意思是，短文作者认为一般电脑使用者无需了解鼠标是如何发明的。题句表达的内容短文中找不到，故答案为C。

　　4.A短文的第三段说到鼠标的部件有滚动部件如滚球，还有光电装置如二极管等。二极管将光信号转换为电信号，传送到电脑，电脑根据收到的电信号作出相应的反应，因此，二极管是鼠标的主要部件，而滚轮等只是辅助性的机械部件。题句对短文信息的推断是正确的，故答案为A。

　　和末段倒数第二句都提到，鼠标脏了，可以擦干净再用。题句的信息是错误的，故答案为B。

　　7.A末段说到光学鼠标因为没有普通鼠标使用的滚动部件，所以不会吸附灰尘，用不着擦拭，这是一种新型的鼠标。题句是对短文信息的一种合理的推断，所以选项A是答案。