关于并行数据库结构,以下说法错误的是

A、在共享内存结构的系统中,如果处理器数量过多,容易造成内存访问冲突
B、在共享磁盘结构的系统中,所有处理机都没有独立的主存储器,并且通过网络共享磁盘
C、在无共享结构的系统中,每个处理机拥有独立的主存储器和磁盘,不共享资源
D、层次结构综合了共享内存、共享磁盘和无共享结构的特点
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正确答案:

B

答案解析:

暂无解析

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PartIReadingComprehension

Directions:Inthisparttherearefourpassages.Eachpassageisfollowedbyfourcomprehensionquestions.Readthepassageandanswerthequestions.ThenmarkyouranswerontheAnswerSheet.

Passage1

Questions1to5arebasedonthefollowingpassage:

Askthreepeopletolookthesamewindowatabusystreetcornerandtellyouwhattheysee.Chancesareyouwillreceivethreedifferentanswers.Eachpersonseesthesamescene,buteachperceivessomethingdifferentaboutit.

Perceivinggoesoninourminds.Ofthethreepeoplewholookoutthewindow,onemaysaythatheseesapolicemangivingamotoristaticket.Anothermaysaythatheseesarush-hourtrafficjamattheintersection.Thethirdmaytellyouthatheseesawomantryingtocrossthestreetwithfourchildrenintow.Forperceptionisthemind’sinterpretationofwhatthesenses—inthiscaseoureyes—tellus.

Manypsychologiststodayareworkingtotrytodeterminejusthowapersonexperiencesorperceivestheworldaroundhim.Usingascientificapproach,thesepsychologistssetupexperimentsinwhichtheycancontrolallofthefactors.Bymeasuringandchartingtheresultsofmanyexperiments,theyaretryingtofindoutwhatmakesdifferentpeopleperceivetotallydifferentthingsaboutthesamescene.

1.Seeingandperceivingare.

A.thesameaction

B.twoseparateactions

C.twoactionscarriedonentirelybyeyes

D.severalactionsthattakeplaceatdifferenttimes

2.Perceivingisanactionthattakesplace.

A.inoureyes

B.onlywhenwethinkveryhardaboutsomething

C.onlyunderthedirectionofapsychologist

D.ineveryperson’smind

3.Peopleperceivedifferentthingsaboutthesamescenebecause.

A.theyseedifferentthingsB.somehavebettereyesight

C.theycannotagreeaboutthingsD.noneofthese

4.Whichofthefollowingisimpliedbutnotstatedinthepassage?

A.Psychologistsdonotyetknowpeoplesee.

B.Theexperimentsinwhichallfactorsarecontrolledarebetter.

C.Thestudyofperceptionisgoingonnow.

D.Perceptiondoesnotinvolvepsychologicalfactors.

5.Thebesttitleforthisselectionis.

A.HowWeSee

B.LearningaboutOurMindsthroughScience

C.WhatPsychologistsPerceive

D.HowtoBecauseanExperimentalPsychologist

Questions1to5arebasedonthefollowingpassage:

Someyearsagothecaptainofashipwasveryinterestedinmedicine.Healwaystookmedicinebookstoseaandlikedtotalkaboutdifferentdiseases.

Onedayalazysailoronhisshippretendedtobeill.Helayonhisbunk(铺)andgroanedasifhewereverysick.Thecaptaincametoseehimandwasverypleasedtohaveapatienttolookafter.Hetoldthemantorestforafewdaysandmadetheothersailorsdohiswork.Threedayslateranothersailorpretendedthathehadsomethingwrongwithhischest.Oncemorethecaptainlookedinhismedicalbooksandtold“sick”mantohavearest.

Theothersailorswereveryangrybecausetheyhadmoreworktodo.Thepatientshadthebestfoodandlaughedattheirfriendswhenthecaptainwasnotlooking.Atlastthemate(船长副手)decidedtocurethe“sick”men.Hemixedupsomesoap,soot(烟灰),glue(胶水)andotherunpleasantthings.Thenheobtainedpermissionfromthecaptaintogivehismedicinetothe“sick”men.Whentheytastedthemedicine,theyreallydidfeelill.Itwassohorriblethatoneofthepatientsjumpedoutofhibunk,ranupondeskandclimbedthehighestmastontheship.Hedidnotwantanymoremedicine.

Thematetoldbothofthementhattheymusttakethemedicineeveryhalfanhour,nightandday.Thissooncuredthem.Theybothsaidtheyfeltbetterandwantedtostartwordagain.Thecaptainrealizedthatthementriedtodeceivehimsohemadethemworkveryhardfortherestofthevoyage.

1.Thefirstsailorpretendedtobeillbecausehewantedto.

A.testthecaptain’sknowledgeofmedicine

B.befreefromwork

C.havethebestfoodontheship

D.playajokeonhisfriends

2.Whenthecaptainknewasailorwasill,he.

A.didn’tcaremuch

B.sentforadoctor

C.lookedafterhimandtoldhimtohavearest

D.gavehimsomemedicine

3.Thepatientsfeltbetterquicklybecause.

A.theyhadbeengivenpropermedicine

B.theylearnedthatthecaptainhadfoundoutthetruth

C.theywerelaughedatbytheirfriends

D.themedicinethemategavewashorrible

4.Whenthecaptainknewhehadbeendeceived,he.

A.toldthemnottodosoagain

B.losthistemper

C.madethemworkharder

D.firedthem

5.Whichofthefollowingbestsummarizesthepassage?

A.AsuddenCure.

B.TwoPatients.

C.CaptainandSailors.

D.ADifficultVoyage.

Lifeistooshort________________(不可每天将时间浪费在看电视上).

接产要领不包括下列哪项

A、无菌操作,保护会阴
B、协助胎头俯屈与仰伸
C、胎头仰伸时令产妇屏气
D、必须让产妇与接产者充分合作
E、让胎头在宫缩间歇缓慢通过阴道口

Passage3

Questions11to15arebasedonthefollowingpassage:

Thecowboyistheheroofmanymovies,.Heis,eventoday,asymbolofcourageandadventure.Butwhatwasthelifeofthecowboyreallylike?

Thecowboy’sjobisclearfromthewordcowboy.Cowboyweremenwhotookcareofcowsandothercattle.ThecattlewereintheWestandinTexas.PeopleinthecitiesoftheEastwantedbeefthesecattle.Trainscouldtakethecattleeast.Butfirstthecattlehadtogettothetrains.Partofthecowboy’sjobwastotakethecattlehundredsofmilestotherailroadtown.Thetripswerecalledcattledrivers.Acattledriveusuallytookseveralmonths.Cowboysrodeforsixteenhoursaday.Becausetheyrodesomuch,eachcowboybroughtalongabouteighthorses.Acowboychangedhorsesseveraltimeseachday.

Thecowboyshadtomakesurethatcattlearrivedsafely.Beforestartingonadrive,thecowboysbrandedthecattle.Theyburnedamarkonthecattletoshowwhotheybelongedto.Butthesemarksdidn’tstoprustlers,orcattlethieves.Cowboyshadtoprotectthecattlefromrustlers.Rustlersmadethedangeroustripevenmoredangerous.

Eventhoughtheirworkwasverydifficultanddangerous,cowboysdidnotearnmuchmoney.Theywerepaidbadly.Yetcowboyslikedtheirwayoflife.Theylivedinawildandopencountry.Theylivedalifeofadventureandfreedom.

11.Acowboyisasymbolof.

A.courageandadventureB.ahardlifeandbigpay

C.moviesinthepastD.cowsandothercattle

12.Thecowboys’jobwas.

A.tobeaheroinreallifeB.tobeaheroofthemovie

C.totakecareofcattleD.tobeadangerousrustler

13.Duringacattledriver,cowboystookagroupofcowsfromawildandopencountryto.

A.theWeststatesandTexasB.thecitiesoftheEastStates

C.thepeoplewhoeatbeefincitiesD.therailroadtownshundredmilesaway

14.Ontheirwayofcattledrivers,thecowboysprotectedthecattleby.

A.burningamarkontheircowsB.keepinganeyeoncattlethieves

C.makingthetripmoredangerousD.lookingaftereightcowseachperson

15.Cowboysenjoyedthemselvesbecause.

A.theylikedtheirwayoflifeB.theymadealotofmoney

C.theyhadavarydifficultjobD.theywereheroesinmovies

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