计算机英语 学生用书第二版习题答案docWord文档格式.docx
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计算机英语 学生用书第二版习题答案docWord文档格式.docx
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2.Thismaterialis_____tobepuresilk.
warranted
3.Hechangedhispoundsforthe_____amountofdollars.
equivalent
4.Theregulations_____thatyoumayuseadictionaryintheexamination.
specify
5._____mathematicshasbecomepopularinrecentdecadesbecauseofitsapplicationstocomputerscience.
Discrete
6.The_____0.61standsfor61hundredths.
decimal
7.Theelectricallychargedgasparticlesareaffectedby_____forces.
magnetic
8.Bessiehas_____herlifetocaringforothers.
dedicated
VI.Lookatthefollowingsentencetakenfromyourreadingpassage.Justthinkaboutwhatelseyoucan“increase”andfillinthesentenceswiththerightwords.
e.g.Aspecialvery-high-speedmemorycalledacacheissometimesusedtoincreasethespeedofprocessingbymakingcurrentprogramsanddataavailabletotheCPUatarapidrate.
2.Theplanistoincreasetheeffi______oftherailwayservicesandprovidemorechoicesforpassengers.
ciency
1.Theaimofthiscourseistoincreasetheawa______ofself-worthofourblackchildren.
reness
4.TheirpurposesinstudyingintheUnitedStatesincludeincreasingtheircom______ofEnglish,tofinishhighschool,andtounderstandtheAmericanwayoflifeasmuchaspossible.
mand
3.Whenwearelearninganewlanguagewehavetotakeintoaccounttheincreasinginter_____ofdifferentculturesinsociety.
action
6.Heincreasedhissp______toovertakethelorry.
eed
5.Thisnewteachingtoolshowshowtocombinetraditionalclassroomtechniqueswiththeuseofvideoandthiswillincreasethecon_______ofteacherswhomaybeunfamiliarwiththemedium.
fidence
VII.Choosethebestoneofthefouranswersgiventofillineachblank.
A2.B3.A4.B5.C
6.C7.A8.D9.D10.C
VIII.TranslatethefollowingintoEnglish.
1.通过应用各种编码技术。
一组二进制不但可以表示二进制数据,而且还可以表示其他离散符号,如十进制数字或字母表中的字母。
2.另一方面,系统软件控制计算机系统,它不仅包括专业人员用于创建应用软件的复杂程序,而且还包括用于启动计算机和提供给其它程序使用的管理程序。
3.数据是数字和其他二进制代码信息,这些二进制代码信息是可操作并能满足要求的计算机结果。
4.计算机能将若干字符连成串,而不是用算术方法或逻辑方法处理字符,用串代替其它字符或另行处理字符串。
5.软件应用像文字处理、电子表格、数据库管理程序、画图程序及桌面印刷等等起到一定的商业效力,使更多的人去使用计算机。
2章
I.Fillinthefollowingblanks.
1.theI/Osubsystem2.ReadOnlyMemory(ROM)3.SRAM
4.input-outputinterface(I/Ointerface)
5.interrupts
1.F
2.T
3.F
4.F
5.F
2.D
3.A
4.B
1.C
1.系统总线
2.虚拟存储器
3.计算机体系结构
4.指令集
5.直接存储器存取
1.TheEmploymentMinistersaidthereformswould______newjobs.
generate
2.Theinternationaloilmarketshavebeenhighly______sincetheearly1970s.
volatile
3.Theywantedto______adiscussiononeconomics.
initiate
4.Thegovernmentpromisedto______anewsystemtocontrolfinancialloaninstitutions.
implement
5.Onegroupclaimedtohave______theAmericanhostage.
executed
6.Heisproudthathiswifeis______toreason.
accessible
7.Thegovernment’sfirstconcernwastoaugmentthearmyand______forces.
auxiliary
8.Achildmaynot______betweenhisimaginationandtherealworld.
differentiate
VI.Lookatthefollowingsentencetakenfromyourreadingpassage.Justthinkaboutwhatelseyoucan“generate”andfillinthesentenceswiththerightwords.
e.g.Thisunitgeneratestheinternalcontrolsignalsthatcauseregisterstoloaddata.
2.They’vejustbuiltanewnuclearplanttogeneratemoreel_________tomeetthedemandsofthelocalpeople.
ectricity
1.Withitsabilitytogeneratenumerousse______quickly,thisnewtypeofweedsoonbecamethedisasteroftheland.
eds
4.Thegovernmentwillputforwardanewprogramwhichwillstrengthenlocaleconomies,generatejo_________andimprovethequalityofpeople’slives.
bs
3.Mid-sizedcitieslikeBangalorearenowtheSiliconValleysofIndia——theirworkersgeneratede___________fortheveryproductsthattheyproduce.
mand
6.Thevastamountofpu______theygeneratedwasimmediatelyreflectedinsales.
blicity
5.Mike’sabsencefromtheclassthatmorningdidn’tgenerateanyat______.
tention
1.A2.B3.C4.C5.D
6.A7.B8.D9.C10.B
1.为了保证内部和外部控制信号的序列正确,控制单元保证CPU和计算机的其他部件提供需要正确执行的指令操作。
2.在使用了虚拟存储器的计算机中,很少使用的程序从RAM被移到硬盘中,仅当需要时才被移回来。
3.为了弥补操作速度的不匹配,在CPU和主存之间采用非常快的小缓存,它的存取时间接近于处理器的逻辑时钟周期。
4.外设的数据传输速率通常比CPU的传输速率慢,因此就需要一个同步装置。
5.在一些计算机中,中断向量是一个地址,它指向存储器中存储I/O服务程序起始地址的单元。
3章
1.Pipelines
2.Theoverlappingofcomputation
3.thelengthofthevector
4.RISCCISC
5.instructionstreamdatastream
2.F
3.T
4.T
2.b
3.d
4.a
1.c
1.并行处理
2流水线处理
3.向量处理
4.标量处理器
5.向下兼容
1.Inthiswaythechildrenareintroducedto______learning.
concurrent
2.Thetwinsaresoalikethatnoonecan______onefromtheother.
distinguish
3.Shequestionedwhetheritwas______tostimulateinvestmentintheseregions.
feasible
4.Linesdividedtheareainto______.
segments
5.Eveninthe______environmentofanoffice,ourbodyrhythmscontinuetoaffectus.Othervariablesinmakingforecastsfortheindustryincludetheweatherandthegeneraleconomicclimate.
artificial
6.TheSexDiscriminationActhasnot______discriminationinemployment.
variable
7.Academicdepartmentsarebeing______.
eliminate
8.Thewrittenrecordofourconversationdoesn’t______with(i.e.,i.e.,isdifferentfrom)whatwasactuallysaid.
correspond
VI.Lookatthefollowingsentencetakenfromyourreadingpassage.Justthinkaboutwhatelseyoucan“perform”andfillinthesentenceswiththerightwords.
e.g.Theregisterholdsthedataandthecombinationalcircuitperformsthesuboperationintheparticularsegment.
2.Wearethesamebiologicallyandourbodiesperformthesamefu________everywhereontheplanet.
nctions
1.Threebasicpiecesofequipmentwillhelpyoutoperformavarietyofex________toimproveyourfigure.
ercises
4.Valentineignoredthebanandcontinuedtoperformma_______foryoungloversinsecret.
riages
3.BancroftCommunitystudentswillliveinapartmentsorinahouse,cookingtheirownmeals,washingtheirownclothes,andlearningtoperformotherta_______.
sks
6.Hiscouncilhadtoperformmi_______onatinybudget.
racles
5.Wewerepleasedtohavetheopportunitytowatchsuchgooddancersperformahighlypraisednewba_______.
llet
1.B2.C3.D4.C5.A
6.A7.C8.D9.B10.D
1.并行处理的目的是加快计算机的处理速度并增加其吞吐量,所谓吞吐量是指在规定的时间间隔内所完成的指令。
2.流水线的特征就在于在同一时间里可以在不同的子过程中处理几个不同的运算。
3.只有采用最快和最可靠的硬件并应用向量处理和并行处理等新技术才能获得这些高性能的处理能力。
4.一般来说,指令集中的指令数量越多,CPU内部的传播延迟时间就越长。
5.虽然CISC处理器更为复杂,但这并不一定必然会导致开发成本的增加。
4章
1.itssyntaxitssemantics
2.pseudocode
3.runningtime
4.maximum
5.list
III.Answerthefollowingquestion.
1.Listthestepsinvolvedinadivide-and-conqueralgorithm.
1.Thestepsinvolvedinadivide-and-conqueralgorithmcanbesummarizedasfollows:
First,dividetheoriginalproblemintoanumberofsubproblems.Next,solve(i.e.,conquer)thesubproblems.Ifthesubproblemsaresmallenough,theyshouldbesolveddirectly;
otherwise,theyshouldbesolvedrecursively.Finally,combinethesolutionstothesubproblemstoproducethefinalsolution.
2.Listapproachthatisoftenusedtosolveoptimizationproblems.
2.
Brute-forceAlgorithms
Divide-and-conquerAlgorithms
DynamicProgramming
GreedyAlgorithms
RandomizedAlgorithms
3.Describedifferencesbetweenabinarytreeandatree.
3.Theessentialdifferencesbetweenabinarytreeandatreeasfollows:
Abinarytreecanbeempty,whereasatreecannot.
Eachnodeinabinarytreehasexactlytwosubtrees(oneorbothofthesesubtreesmaybeempty).Eachnodeinatreecanhaveanynumberofsubtrees.
Thesubtreesofeachnodeinabinarytreeareordered.Thesubtreesinatreeareunordered.
1.并行算法
2.穷举搜索
3.动态规划
4.双向链表
5.二维数组
1.Somepeopledonot________toacademicexpectationsorthesocialabilitiesofothers,andtheyareplacedoutsidesociety.
conform
2.Allflowingwater,thoughitappearstobe________,isactuallydividedintoextensiveinnersurfaces,orlayers,movingagainstoneanother.
uniform
3.Thisisbynomeansan_______listbutitgivesanindicationofthemanyprojectstakingplace.
exhaustive
4.Mostpeopledostopatthispoint,not________thatthereisanythingbeyond.
envisioning
5.Thecompanyhasworkedoutan________managementtrainingschemeforgraduates.
elaborate
6.Themenweretryingto________weaponsleftwhenthearmyabandonedtheisland.
retrieve
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