人邮计算机英语第三版课后习题答案.doc

《人邮计算机英语第三版课后习题答案.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit1〖Ex.1〗根据课文内容回答问题(1)Ageneral-purposecomputerhasfourmainsections.Theyarethearithmeticandlogicunit(ALU),thecontrolunit,thememory,andtheinputandoutputdevices,collectivelytermedI/O.Theyareinterconnectedbybusses,oftenmadeofgroupsofwires.(2)Thecontrolunitisoftencalledacontro

2、lsystemorcentralcontroller.(3)●Readthecodeforthenextinstructionfromthecellindicatedbytheprogramcounter.●Decodethenumericalcodefortheinstructionintoasetofcommandsorsignalsforeachoftheothersystems.●Incrementtheprogramcountersoitpointstothenextinstruction.●Readwhateverdatathe

3、instructionrequiresfromcellsinmemory,orperhapsfromaninputdevice.Thelocationofthisrequireddataistypicallystoredwithintheinstructioncode.●ProvidethenecessarydatatoanALUorregister.●IftheinstructionrequiresanALUorspecializedhardwaretocomplete,instructthehardwaretoperformthereq

4、uestedoperation.●WritetheresultfromtheALUbacktoamemorylocationortoaregisterorperhapsanoutputdevice.●Jumpbacktothefirststep.(4)ThetwoclassesofoperationsALUiscapableofperformingarearithmeticandlogic.(5)LogicoperationsinvolveBooleanlogic:AND,OR,XORandNOT.(6)Acomputer'smemoryc

5、anbeviewedasalistofcellsintowhichnumberscanbeplacedorread.Eachcellhasanumbered"address"andcanstoreasinglenumber.(7)ThetwoprincipalvarietiesofcomputermainmemoryarerandomaccessmemoryorRAMandread-onlymemoryorROM.(8)InaPC,thespecializedprogramcalledtheBIOSorchestratesloadingth

6、ecomputer'soperatingsystemfromtheharddiskdriveintoRAMwheneverthecomputeristurnedonorreset.(9)SoftwarethatisstoredinROMisoftencalledfirmwarebecauseitisnotionallymorelikehardwarethansoftware.(10)I/Oisthemeansbywhichacomputerreceivesinformationfromtheoutsideworldandsendsresul

7、tsback.〖Ex.2〗根据下面的英文解释，写出相应的英文词汇(1)input(2)microprocessor(3)program(4)bus(5)hardware(6)memory(7)output(8)cell(9)register(10)address〖Ex.3〗把下列句子翻译为中文(1)他进城的目的是买一台新计算机。(2)大多数在线服务都有自己的浏览器。(3)软盘可以是双倍密度的或者高密度的。(4)公式包括单元的地址。(5)C语言也许最适宜被称为“中级语言”。(6)每一个浏览器都有内置的功能来理解HTML。(7)C语言是世界上最

8、流行的计算机语言之一。(8)Java技术既是一种编程语言，也是一个平台。(9)实际上，一个视窗管理器可以被看作是命令行操作系统的图形用户界面。(10)数据库管理系统处理用户对数据