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在一个段式存储管理系统中,逻辑地址为32位,其中高16位为段号,低16位为段内偏移,以下是段表(其中的数据均为16进制见表3-19): 表3-19 段表 以下是代码段的内容: ...
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一个分页存储管理系统中地址长度为32位其中页号占10位则系统中页面的大小为______
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在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
一个分段存储管理系统中地址长度为32位其中段号占8位则最大段长是
2
8
字节
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在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
一个分段存储管理系统中地址长度为32位其中段号占8位则段长最大
2的8次方字节
2的16次方字节
2的24次方字节
2的32次方字节
一个分段存储管理系统中地址长度为32位其中段号占8位则最大段长是
2
8
B
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16
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在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
某分页系统的逻辑地址为16位其中高6位为页号低10位为页内地址请问 1这样的地址结构一页有多少字节逻
一个分段存储管理系统中地址长度为32位其中段号占8位则最大段长是
2
8
字节
2
16
字节
2
24
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2
32
字节
在一个段式存储管理系统中逻辑地址为32位其中高16位为段号低16位为段内偏移以下是段表其中的数
一个分段存储管理系统中地址长度为32位其中段号占8位则段长最大
2的8次方字节
2的16次方字节
2的24次方字节
2的32次方字节
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在存储管理中采用覆盖与交换技术的目的是
存储管理的目的是
[A]SharetheResponsibility [B]KeepYourReceipts [C]CutBadHabits [D]BalanceYourCheckbook [E]RemainFlexible [F]PayDownDebt [G]FocusonSavings Youhaveabigexpensecomingup.Youneedabettercarorabiggerhomeoryouwanttogobacktocollege.WhatdoyoudoBorrowborrowborrow——rightWellmaybenot.Ifyou’vecreatedabudgetyouknowexactlyhowmuchmoneyyouhavecominginandhowmuchisgoingout.Youcanmakesomeplansconcerningthatbigexpense.Butifyoudon’thaveabudgetplanyouprobablydon’thaveaverygoodpictureofyourfinancesandyoumaybetemptedtoborrowmoremoneyratherthansqueezingallyoucanfromyourincome.It’sdefinitelybetterinthelongrun——foryouandforyourmoney——tohaveabudget. 41.______ Bynowyou’vesetupyourbudget.Youknowhowmuchmoneyyouhave.Butyoucouldstillusesomehelpstayingonbudget.Herearesometipsthatcanhelpyousticktoyourbudgetandgetaheadonthatmajorpurchase.Determinetheamountofyourbudgetthatyoucanaffordtosaveeachmonth.Haveitdirect-depositedtoyoursavingsaccountortoyourmutualfund.Whereveryoudecidetokeepyoursavingsmakesureyouputmoneyintoiteverymonth.Thatsavingswillmakeabigdifferenceforyoulater. 42.______ Whetherit’salcoholortobaccoifyouusemuchofeitheryouknowhowexpensivebadhabitscanbe.Stopsmokinganddrinkingandputthebeer/cigarettemoneytowardyourotherexpenses.You’llseeyourbillscomedown——andfeelyourhealthimprove——innotime.You’llalsosaveonhealthcareexpensesdowntheroadandyoumaybecomeeligibleforlowerinsurancepremiums. 43.______ Makesureyou’renottheonlymemberofyourhouseholdconcernedaboutyourbudget.Ifyou’reworkinghardtosavemoneybutyourspouseisoutspendingyouintodebtyou’refightingalosingbattle.Sitdowntogetherandmakeaplantodeterminehowmuchspendingmoneyyoushouldeachhave.Thencheckineveryweektoseehowwellyou’redoing.Iftheentirefamilysharestheresponsibilityforthebudgeteveryonecancutbackjustalittleandmakeabigdifference.Onepersonshouldn’thavetoshouldertheentireburdenalone. 44.______ Ifyouhavecreditcarddebtyoumayfeellikeit’sgoingtotakeforevertopayitoff.Butyoucangetaheadbychoosingonecard——ideallytheonewiththehighestinterestrate——andpayingasmuchasyoucanoniteverymonth.Ifyouhaveothercardspaytheminimumbalanceonthoseuntilyou’vepaidoffthefirstcard.Thenchoosethenextcardandpayextraonitwhileyoupayminimumsontheothers.Ifyoupayonlytheminimumsonallyourcardsyou’llbepayingalotmoreininterestthanyoumayrealize. 45.______ Youprobablymonitoredyourexpensesforseveralweekstomakeabudget.Oncethebudgetismadethoughitcanbetemptingtostopkeepingupwitheverylittleexpense.Butkeepingtrackreallycanhelpyousticktoyourbudget.Saveyourreceiptsandwritedowntheplacesyouspendmoney.You’llbelesslikelytooverspendifyourealizehowmuchmoneyhasactuallygonethroughyourhands. 44
下面关于存储管理的叙述中正确的是
采用可重入程序是通过方法来改善系统性能的
从下列关于非虚拟存储器的论述中正确的论述是
在分页存储管理中主存的分配是
在段页式分配中CPU每次从内存中取一次数据需要次访问内存
Imagineaworldwhereyourdoctorcouldhelpyouavoidsicknessusingknowledgeofyourgenesaswellashowyouliveyourlife.Orwherehewouldprescribedrugsheknewwouldworkandnothavedebilitatingside-effects. Suchafutureisarrivingfasterthanmostrealise:genetictestsarealreadywidelyusedtoidentifypatientswhowillbehelpedorharmedbycertaindrugs.Andthreeyearsagointhefaceofatorrentofnewscientificdataanumberofnewcompaniessetthemselvesuptointerpretthisinformationforcustomers.ThroughshopfrontsontheinternetanyonecouldorderatestingkitspitintoatubeandsendofftheirDNA—withresultsdownloadedprivatelyathome.Alreadycustomerscanfindouttheirresponsetomanycommonmedicationssuchasantiviralsandblood-thinningagents.Theycanalsoexploretheirgeneticlikelihoodofdevelopingdeep-veinthrombosisskincancerorglaucoma. Theindustryhasbeensubjecttoconflictingcriticisms.Ontheonehanditstandsaccusedofofferinginformationtoodangeroustotrusttoconsumers;ontheotheritischargedwithpeddlingirrelevantmisleadingnonsense.ForsomeraredisorderssuchasHuntington’sandTay-Sachsgeneticinformationisadiagnosis.Butmostdiseasesaremorecomplicatedandinvolveseveralgenesoranenvironmentalcomponentorboth.Someone’schanceofgettingskincancerforexamplewilldependonwhetherheworshipsthesunaswellasonhisgenes. America’sGovernmentAccountabilityOfficeGAOreportalsorevealedwhattheindustryhasopenlyadmittedforyears:thatresultsofdisease-predictiontestsfromdifferentcompaniessometimesconflictwithoneanotherbecausethereisnoindustry-wideagreementonstandardlifetimerisks. GovernmentshatethissortofanarchyandAmerica’sinparticularisconsideringregulation.Butthreethingsargueagainstwholesaleregulation.Firstthelevelofinterferenceneedstobebasedonthelevelofriskatestrepresents.Thegovernmentdoesnotneedtobeinvolvedifsomeonedecidestotracehisancestryordiscoverwhattypeofearwaxhehas.Secondthelawsonfraudshouldbesufficienttodealwiththesnake-oilsalesmenwhopromisetopredictsaywhetherachildmightbeasportingchampion.Andthirdscienceischangingveryfast.Fairlysoonacustomer’swholegenomewillbesequencednotmerelythepartsthoughttobemedicallyrelevantthatthetestingcompaniesnowconcentrateonandhewillthenbeabletocranktheresultsthroughopen-sourceinterpretationsoftwaredownloadablefromanywhereontheplanet.Thatwillcreateproblemsbuttheonlywaytostopthathappeningwouldbetomakeitillegalforsomeonetohavehisgenomesequenced—andnobodyisseriouslysuggestingthatilliberalrestriction. Insteadthenofreactinginahostilefashiontothetrendforpeopletotakegenetictestsgovernmentsshouldbeaskingthemselveshowtheycanmakebestuseofthisnewsourceofinformation.Restrictingaccesstoteststhatinformpeopleaboutbadreactionstodrugscoulddoharm.Therealquestionisnotwhocontrolsaccessbuthowtominimisetherisksandmaximisetherewardsofausefulrevolution. Accordingtotheauthorwhatshouldthegovernmentdoaboutgenetictest
段页式存储管理中地址映射表是
动态分区又称为可变式分区它是在系统运行过程中动态建立的
设内存的分配情况如图3-19所示若要申请一块40K的内存空间采用最佳适应算法则所得到的分区首址为
分区管理中采用最佳适应分配算法时把空闲区按次序登记在空闲区表中
某个操作系统对内存的管理采用页式存储管理方法所划分的页面大小
在分段存储管理方式中
页式存储管理中页表的始地址存放在中
LongbeforetheneweconomymadecatchwordsofspeedcustomizationsupplychainmanagementandinformationsharingSpanishclothingretailerZarawascarryingoutarevolutionofitsown.46Bytranslatingthelatesttrendsintodesignsthataremanufacturedinlessthan15days—anddeliveringthemtoitsstorestwiceaweek—Zarapioneeredanewkindofquickcustom-maderetailingthathastransformedtherelativelylowprofileretailerintoaglobalpowerhouse.NobodyelsecangetnewdesignstostoresasquicklysaysKeithWillsEuropeanretailanalystatGoldmanSachs."Unlessyoucandothatyouwon’tbeinbusinessintenyears." 47NotonlyhasZara—theflagshipstoreofprivatetextilecompanyInditex—distinguisheditselfbytightlyintegratingitsdesignandmanufacturingsystemsbutitsclothinghasfilledanuntappedniche."Armaniatmoderateprices"saysoneGoldmanSachsanalyst.Theformulaseemstobepayingoff:Zarawhichisresponsiblefornearly80%ofInditex’srevenuesopeneditsfirststorein1975andhassinceexpandedtomorethan400storesin25countries.Thoughitdoesn’tgenerateasmuchinrevenuesastheGap$11.6billionorSwedishclothierH&Mabout$3.6billionZara’sparenthadsalesofabout$2billionlastyearwhichrepresenteda26%increasefrom1998.Thecompany’sprofitswereup34%toaround$186millionlastyear. Zaraderivesitscompetitiveadvantagefromanastuteuseofinformationandtechnology.Allofitsstoresareelectronicallylinkedtothecompany’sheadquartersnearLaCorunaamidsizedcityonthenorthwestcoastofSpain.Storemanagersmonitorhowmerchandiseissellingandtransmitthisinformationaswellascustomerrequeststoheadquarters."TheroleofthestoremanagergoeswaybeyondthatofGapandH&M"saysWillsofGoldmanSachs.48Togetherwithtrendspotterswhotraveltheglobeinsearchofnewfashionstoremanagersmakesuretheirdesignershaveaccesstorealtimeinformationwhendecidingwiththecommercialteamonthefabriccutandpricepointsofanewgarment. InadditionInditex’sproductionsystemtrulydifferentiatesZarafromitscompetition.WhiletheGapandH&MoutsourcemostoftheirmanufacturingZaraproduces60%ofitsmerchandiseinhouse.Fabric—whichcomesfromplaceslikeSpaintheFarEastIndiaandMorocco—iscutandcoloredatthecompany’sstateoftheartfactory.Thenusinginformationgatheredfromstoresproductionmanagersdecidehowmanygarmentstomakeandwhichstoreswillgetthem.Finallythefabricissenttolocalshopstobeassembledbeforebeingshippedaroundtheworld.49ThiscombinationofrealtimeinformationsharingandinternalizedproductionmeansthatZaracanworkwithalmostnostockandstillhavenewdesignsinthestoretwiceaweekasopposedtothesixweeksthatittraditionallytakesmostcompetitors. 50ThequestionnowishowfarZarawhichrunsalmostnoadvertisingoutsideofitsbiannualstorewidesalescangowiththeconceptofdesignondemandretailing.ThechainiswellknowninSouthAmericaandEuropewhereitiscurrentlyexpandinginGermany.Internationalsalesaccountedforalmost50%ofitstotal.It’slesswellknownintheU.S.;ithasjustsixstoresintheNewYorkCityarea.Butdon’tunderestimatethisSpanishgiant.Inditexrecentlyannounceditwasexploringapublicofferingandit’sprobablyjustamatteratimebeforeitdispatchesZaratoconquertheNewWorld. 50
不会产生内部碎片的存储管理是
采用段式存储管理时一个程序如何分段是在时决定的
在可变分区管理中采用拼接技术的目的是
Directions Writeanessayof160-200wordsbasedonthefollowingdrawing.Inyouressayyoushould 1describethedrawingbriefly 2interpretthesocialphenomenonreflectedbythemandthen 3giveyourpointsofview. YoushouldwriteneatlyonANSWERSHEET2.
下面的存储管理方案中方式可以采用静态重定位
存储管理方案中可采用覆盖技术
LongbeforetheneweconomymadecatchwordsofspeedcustomizationsupplychainmanagementandinformationsharingSpanishclothingretailerZarawascarryingoutarevolutionofitsown.46Bytranslatingthelatesttrendsintodesignsthataremanufacturedinlessthan15days—anddeliveringthemtoitsstorestwiceaweek—Zarapioneeredanewkindofquickcustom-maderetailingthathastransformedtherelativelylowprofileretailerintoaglobalpowerhouse.NobodyelsecangetnewdesignstostoresasquicklysaysKeithWillsEuropeanretailanalystatGoldmanSachs."Unlessyoucandothatyouwon’tbeinbusinessintenyears." 47NotonlyhasZara—theflagshipstoreofprivatetextilecompanyInditex—distinguisheditselfbytightlyintegratingitsdesignandmanufacturingsystemsbutitsclothinghasfilledanuntappedniche."Armaniatmoderateprices"saysoneGoldmanSachsanalyst.Theformulaseemstobepayingoff:Zarawhichisresponsiblefornearly80%ofInditex’srevenuesopeneditsfirststorein1975andhassinceexpandedtomorethan400storesin25countries.Thoughitdoesn’tgenerateasmuchinrevenuesastheGap$11.6billionorSwedishclothierH&Mabout$3.6billionZara’sparenthadsalesofabout$2billionlastyearwhichrepresenteda26%increasefrom1998.Thecompany’sprofitswereup34%toaround$186millionlastyear. Zaraderivesitscompetitiveadvantagefromanastuteuseofinformationandtechnology.Allofitsstoresareelectronicallylinkedtothecompany’sheadquartersnearLaCorunaamidsizedcityonthenorthwestcoastofSpain.Storemanagersmonitorhowmerchandiseissellingandtransmitthisinformationaswellascustomerrequeststoheadquarters."TheroleofthestoremanagergoeswaybeyondthatofGapandH&M"saysWillsofGoldmanSachs.48Togetherwithtrendspotterswhotraveltheglobeinsearchofnewfashionstoremanagersmakesuretheirdesignershaveaccesstorealtimeinformationwhendecidingwiththecommercialteamonthefabriccutandpricepointsofanewgarment. InadditionInditex’sproductionsystemtrulydifferentiatesZarafromitscompetition.WhiletheGapandH&MoutsourcemostoftheirmanufacturingZaraproduces60%ofitsmerchandiseinhouse.Fabric—whichcomesfromplaceslikeSpaintheFarEastIndiaandMorocco—iscutandcoloredatthecompany’sstateoftheartfactory.Thenusinginformationgatheredfromstoresproductionmanagersdecidehowmanygarmentstomakeandwhichstoreswillgetthem.Finallythefabricissenttolocalshopstobeassembledbeforebeingshippedaroundtheworld.49ThiscombinationofrealtimeinformationsharingandinternalizedproductionmeansthatZaracanworkwithalmostnostockandstillhavenewdesignsinthestoretwiceaweekasopposedtothesixweeksthatittraditionallytakesmostcompetitors. 50ThequestionnowishowfarZarawhichrunsalmostnoadvertisingoutsideofitsbiannualstorewidesalescangowiththeconceptofdesignondemandretailing.ThechainiswellknowninSouthAmericaandEuropewhereitiscurrentlyexpandinginGermany.Internationalsalesaccountedforalmost50%ofitstotal.It’slesswellknownintheU.S.;ithasjustsixstoresintheNewYorkCityarea.Butdon’tunderestimatethisSpanishgiant.Inditexrecentlyannounceditwasexploringapublicofferingandit’sprobablyjustamatteratimebeforeitdispatchesZaratoconquertheNewWorld. 48
把作业空间中使用的逻辑地址变为内存中物理地址称为
LongbeforetheneweconomymadecatchwordsofspeedcustomizationsupplychainmanagementandinformationsharingSpanishclothingretailerZarawascarryingoutarevolutionofitsown.46Bytranslatingthelatesttrendsintodesignsthataremanufacturedinlessthan15days—anddeliveringthemtoitsstorestwiceaweek—Zarapioneeredanewkindofquickcustom-maderetailingthathastransformedtherelativelylowprofileretailerintoaglobalpowerhouse.NobodyelsecangetnewdesignstostoresasquicklysaysKeithWillsEuropeanretailanalystatGoldmanSachs."Unlessyoucandothatyouwon’tbeinbusinessintenyears." 47NotonlyhasZara—theflagshipstoreofprivatetextilecompanyInditex—distinguisheditselfbytightlyintegratingitsdesignandmanufacturingsystemsbutitsclothinghasfilledanuntappedniche."Armaniatmoderateprices"saysoneGoldmanSachsanalyst.Theformulaseemstobepayingoff:Zarawhichisresponsiblefornearly80%ofInditex’srevenuesopeneditsfirststorein1975andhassinceexpandedtomorethan400storesin25countries.Thoughitdoesn’tgenerateasmuchinrevenuesastheGap$11.6billionorSwedishclothierH&Mabout$3.6billionZara’sparenthadsalesofabout$2billionlastyearwhichrepresenteda26%increasefrom1998.Thecompany’sprofitswereup34%toaround$186millionlastyear. Zaraderivesitscompetitiveadvantagefromanastuteuseofinformationandtechnology.Allofitsstoresareelectronicallylinkedtothecompany’sheadquartersnearLaCorunaamidsizedcityonthenorthwestcoastofSpain.Storemanagersmonitorhowmerchandiseissellingandtransmitthisinformationaswellascustomerrequeststoheadquarters."TheroleofthestoremanagergoeswaybeyondthatofGapandH&M"saysWillsofGoldmanSachs.48Togetherwithtrendspotterswhotraveltheglobeinsearchofnewfashionstoremanagersmakesuretheirdesignershaveaccesstorealtimeinformationwhendecidingwiththecommercialteamonthefabriccutandpricepointsofanewgarment. InadditionInditex’sproductionsystemtrulydifferentiatesZarafromitscompetition.WhiletheGapandH&MoutsourcemostoftheirmanufacturingZaraproduces60%ofitsmerchandiseinhouse.Fabric—whichcomesfromplaceslikeSpaintheFarEastIndiaandMorocco—iscutandcoloredatthecompany’sstateoftheartfactory.Thenusinginformationgatheredfromstoresproductionmanagersdecidehowmanygarmentstomakeandwhichstoreswillgetthem.Finallythefabricissenttolocalshopstobeassembledbeforebeingshippedaroundtheworld.49ThiscombinationofrealtimeinformationsharingandinternalizedproductionmeansthatZaracanworkwithalmostnostockandstillhavenewdesignsinthestoretwiceaweekasopposedtothesixweeksthatittraditionallytakesmostcompetitors. 50ThequestionnowishowfarZarawhichrunsalmostnoadvertisingoutsideofitsbiannualstorewidesalescangowiththeconceptofdesignondemandretailing.ThechainiswellknowninSouthAmericaandEuropewhereitiscurrentlyexpandinginGermany.Internationalsalesaccountedforalmost50%ofitstotal.It’slesswellknownintheU.S.;ithasjustsixstoresintheNewYorkCityarea.Butdon’tunderestimatethisSpanishgiant.Inditexrecentlyannounceditwasexploringapublicofferingandit’sprobablyjustamatteratimebeforeitdispatchesZaratoconquertheNewWorld. 46
某基于动态分区存储管理的计算机其主存容量为55MB初始为空采用最佳适配BestFit算法分配和释放的顺序为分配15MB分配30MB释放15MB分配8MB分配6MB此时主存中最大空闲分区的大小是
操作系统采用分页存储管理方式要求
[A]SharetheResponsibility [B]KeepYourReceipts [C]CutBadHabits [D]BalanceYourCheckbook [E]RemainFlexible [F]PayDownDebt [G]FocusonSavings Youhaveabigexpensecomingup.Youneedabettercarorabiggerhomeoryouwanttogobacktocollege.WhatdoyoudoBorrowborrowborrow——rightWellmaybenot.Ifyou’vecreatedabudgetyouknowexactlyhowmuchmoneyyouhavecominginandhowmuchisgoingout.Youcanmakesomeplansconcerningthatbigexpense.Butifyoudon’thaveabudgetplanyouprobablydon’thaveaverygoodpictureofyourfinancesandyoumaybetemptedtoborrowmoremoneyratherthansqueezingallyoucanfromyourincome.It’sdefinitelybetterinthelongrun——foryouandforyourmoney——tohaveabudget. 41.______ Bynowyou’vesetupyourbudget.Youknowhowmuchmoneyyouhave.Butyoucouldstillusesomehelpstayingonbudget.Herearesometipsthatcanhelpyousticktoyourbudgetandgetaheadonthatmajorpurchase.Determinetheamountofyourbudgetthatyoucanaffordtosaveeachmonth.Haveitdirect-depositedtoyoursavingsaccountortoyourmutualfund.Whereveryoudecidetokeepyoursavingsmakesureyouputmoneyintoiteverymonth.Thatsavingswillmakeabigdifferenceforyoulater. 42.______ Whetherit’salcoholortobaccoifyouusemuchofeitheryouknowhowexpensivebadhabitscanbe.Stopsmokinganddrinkingandputthebeer/cigarettemoneytowardyourotherexpenses.You’llseeyourbillscomedown——andfeelyourhealthimprove——innotime.You’llalsosaveonhealthcareexpensesdowntheroadandyoumaybecomeeligibleforlowerinsurancepremiums. 43.______ Makesureyou’renottheonlymemberofyourhouseholdconcernedaboutyourbudget.Ifyou’reworkinghardtosavemoneybutyourspouseisoutspendingyouintodebtyou’refightingalosingbattle.Sitdowntogetherandmakeaplantodeterminehowmuchspendingmoneyyoushouldeachhave.Thencheckineveryweektoseehowwellyou’redoing.Iftheentirefamilysharestheresponsibilityforthebudgeteveryonecancutbackjustalittleandmakeabigdifference.Onepersonshouldn’thavetoshouldertheentireburdenalone. 44.______ Ifyouhavecreditcarddebtyoumayfeellikeit’sgoingtotakeforevertopayitoff.Butyoucangetaheadbychoosingonecard——ideallytheonewiththehighestinterestrate——andpayingasmuchasyoucanoniteverymonth.Ifyouhaveothercardspaytheminimumbalanceonthoseuntilyou’vepaidoffthefirstcard.Thenchoosethenextcardandpayextraonitwhileyoupayminimumsontheothers.Ifyoupayonlytheminimumsonallyourcardsyou’llbepayingalotmoreininterestthanyoumayrealize. 45.______ Youprobablymonitoredyourexpensesforseveralweekstomakeabudget.Oncethebudgetismadethoughitcanbetemptingtostopkeepingupwitheverylittleexpense.Butkeepingtrackreallycanhelpyousticktoyourbudget.Saveyourreceiptsandwritedowntheplacesyouspendmoney.You’llbelesslikelytooverspendifyourealizehowmuchmoneyhasactuallygonethroughyourhands. 42
采用分页或分段管理后提供给用户的物理地址空间
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