1、Lesson 3 Hardware教学课件教学课件 PC（Personal Computer）is a system，consisting of many components.All the elements fall into one of two categories，hardware or software.The stuff you can actually see and touch，and will break if you throw it out of a fifthstory window，is hardware.1 Programs running upon hardwa
2、re，like Windows XP，are software.This article only talks about hardware.All the items listed below that make up a PC can be purchased individually at computer or web supply stores.Complete PCs can be purchased for about￥3000 today，and the price keep falling!A basic set of hardware found in most PCs i
3、ncludes：PC Case The PC Case is a thin sheet metal enclosure that houses the motherboard，power supply and various drives.The motherboard and power supply are mounted to the floor at the rear of the case.The drives（hard disk drive and CD/DVD）are mounted in enclosures called drive bays at the front of
4、the case.2backback教学课件教学课件 Motherboard The motherboard is the main circuit board in a PC.It contains all the circuits and components that run the PC.Major Components found on the motherboard are CPU，BIOS，RTC and Chip Set.Primary Connectors，like power，keyboard，mouse，display，IDE，Serial Connectors，Para
5、llel Connectors and Expansion Card Connectors，can be found on the motherboard too.Power Supply Power Supply is installed in the back corner of the PC case，next to the motherboard.It converts 120v ac（standard house power）into DC voltages that are used by other components in the PC.Hard Disk Drive（HDD
6、）The HDD installs in one of the 31/2 inch internal drive bays in the PC.It is powered by a 4 conductor cable coming from the power supply.3 All of the information thats“in your computer”is stored in your computers hard disk.Digital Video Disk drive（DVD）The DVD is installed in drive bays in the PC.It
7、 is designed to optically access data stored in a DVD.Data between the DVD drive and the motherboard is carried on a 40pin IDE cable.A standard DVD can store up to 4.7 Gbytes on one side of the disk.A laser moves back and forth on the disk surface to access data at a very fast rate.backback教学课件教学课件
8、Monitors The Monitor is an output device.Two types of monitor technologies to consumers are available in CRT monitors and LCD monitors.Cathode-ray tube，CRT for short，is relatively heavy and big，and available in screen sizes from 14 to 21.A 17 display means that it is 17 measured diagonally from one
9、corner of the tube to the other.4 Liquid crystal display，LCD for short，consists primarily of two glass plates and some liquid crystal material between them.It is smaller and consumes much less power than CRT.Keyboard The keyboard is an standard input device.Data from keyboard is transferred to the P
10、C through a short cable with a circular 6pin connector plugged into the back of the motherboard.5 There are wireless keyboards that communicate with a pod that plugs into the keyboard port.backback教学课件教学课件 Mouse The mouse is the most common“pointing device”used in PCs.Every mouse has two buttons.Mos
11、t mouse have one or two scroll wheels.By default the left button is used to select items.The right button is assigned as a context or alternate menu.Nowadays，optical mouse（rather than track ball mouse）is commonly used，this mouse uses an Infrared transmitter/receiver pair to optically detect the moti
12、on of the mouse.Audio Device Primary audio output devices include speakers and headphones.Some speakers are built into the side of the monitors.Other speakers are free standing.Active speakers amplify the sound signal from the sound card using battery or rectified AC house power.6 Passive speakers a
13、re plugged into and are powered directly from the output signal provided by the“speaker out”port on the sound card.Cables and Wires Cables and Wires connect all the components in PC together and provide power to them.backback教学课件教学课件Key Words&Termscathode阴极chip set芯片组circular圆形的component 成分diagonall
14、y 对角地drive bay驱动架enclosure围栏expansion card 扩展卡individually个别地infrared transmitter 红外发射机motherboard主板parallel connector 并行连接器（设备）PC Case 主机箱pin 针plug into 插入backback教学课件教学课件Key Words&Termspower supply电源rectify矫正serial connector 串行连接器（设备）sound card 声卡stuff材料voltage电压backback教学课件教学课件AbbreviationsAC（Alt
15、ernating Current）交流BIOS（Basic Input/Output System）基本输入/输出系统CRT（Cathode Ray Tube）阴极射线管DC（Direct Current）直流IDE（Integrated Device Electronics）集成设备电路LCD（Liquid Crystal Display）液晶显示；液晶显示器backback教学课件教学课件Notes 1 The stuff you can actually see and touch，and will break if you throw it out of a fifthstory wi
16、ndow，is hardware.本句中的主语是一个定语从句，从句本身又是一个并列句，其中，see and touch，and would likely break作并列谓语，if引导的从句做条件状语。译文：硬件就是你能真正看得见和摸得着的东西，如果你把它从五楼的窗户扔出去的话，它很有可能就坏了。2 The drives（hard disk drive and CD/DVD）are mounted in enclosures called drive bays at the front of the case.本句中的过去分词短语called drive bays作定语修饰drive bays
17、，意为“被称为驱动架”。译文：硬盘和DVD驱动器安装在主机箱前面被称为驱动架的外壳上。3 It is powered by a 4 conductor cable coming from the power supply.本句中的powered by的意思是“由供电”；句中由coming现在分词短语作定语，修饰cable，与定语从句which comes形式等价。译文：（硬盘驱动器）由一根与电源相连的四芯导线供电。backback教学课件教学课件Notes 4 A 17 display means that it is 17 measured diagonally from one corne
18、r of the tube to the other.本句是一个宾语从句，measured引导的过去分词短语作方式状语，相当于if it is measured。译文：17寸显示器是指从射线管一角到对角线上另一角的长度是17寸。5 Data from keyboard is transferred to the PC through a short cable with a circular 6pin connector plugged into the back of the motherboard.本句中，介词短语from keyboard作定语；through引导的介词短语作方式状语，其
19、中with引导的介词短语作定语，修饰a short cable.译文：键盘上的数据通过一根连接线传输到PC上，短线上有一个6针的圆形插槽，该插槽插入主板后面。6 Active speakers amplify the sound signal from the sound card using battery or rectified AC house power.本句中，using引导的现在分词短语作方式状语修饰谓语动词amplify；from引导的介词短语作sound signal的定语。译文：内藏增幅器的扬声器靠电池或校正交流室电供电，放大来自声卡的声音信号。backbackExerci
20、sesTranslate the following phrases into English.1主板2主机箱3硬盘驱动器4光电鼠标6内存7移动硬盘backbackExercisesTranslate the following sentences into Chinese.1PC is a system，consisting of many components.2The motherboard is the main circuit board in a PC.3Major Components found on the motherboard are CPU，BIOS，RTC and C
21、hip Set.4The mouse is the most common“pointing device”.backbackExercisesIdentify the following to be true or false according to the text.1LCD is heavier and bigger than CRT.2Speaker is input device.3Power supply can be found on the motherboard.4Computer components work under AC.Filling in each of th
22、e following blanks according to the text.1All the elements that make up a PC can be purchased .2Power supply is installed in the back corner of the PC case，next to .3All of the information thats“in your computer”is stored on your computers _ .4Nowadays，mouse（rather than track ball mouse）is commonly used.backback
