一般操作系統的安全措施可從隔離、分層和內控三個方面考慮，隔離是操作系統安全保障的措施之一。限制程序的存取，使其不能存取允許范圍以外的實體，這是
A、物理隔離C
暫無解析
關于產時子宮頸口擴大，下列哪項是錯誤的
潛伏期是從規律宮縮開始到宮口開大3cm，正常為()小時;超過()小時為潛伏期延長。
Passage4
Questions16to20arebasedonthefollowingpassage:
Thenewglobalsatellitecommunicationssystemswillofferthreekindsservice,whichmayoverlapinmanydifferentkindsofreceivers.
VOICE.SatellitetelephoneswillbeabletomakecallsfromanywhereontheEarthtoanywhereelse.Thatcouldmakethemespeciallyusefultoremote,thirdworldvillages(someofwhichalreadyusestationarysatellitetelephones),explorersanddisaster-reliefteams.Today’smobiletelephonesdependonearth-boundtransmitters,wheretechnicalstandardsvaryfromcountrytocountry.Sobusinesstravelerscannotusetheirmobilephonesoninternationaltrips.Satellitetelephoneswouldmakethatpossible.
MESSAGING.Satellitemassagershavethesameglobalcoverageassatellitetelephones,butcarrytextalone,whichcouldbeusefulforthosewithlaptopcomputers.Equippedwithasmallscreenliketoday’spapers,satellitemassagerswillalsoreceiveshortmessages.
TRACKING.Voiceandmessagingsystemswillalsotelltheiruserswheretheyaretowithinafewhundredmeters.Combinedwiththemessagingservice,thelocationservicecouldhelprescueteamstofindstrandedadventurers,thepolicetofindstolencars,exporterstofollowtheprogressofcargoes,andhaulagecompaniestocheckthatdriversarenotdetouringthepub.America’smilitaryGlobalPositioningSystem(GPS)satellitewillprovidebetterpositioninginformationtoanyonewhohasareceiverfortheirsignals,butGPSdoesnotcarrymessages,sosuchareceivercannotbeusedonitsownfortrackingorrescue.Bythemid-1990s,GPSreceiverswillbeabletotellpeoplewheretheyaretowithin70metersanywhereintheworld,andtowithinameterorsoinareaswheretheserviceissupplementedbyground-basedtransmitter.
16.Globalsatellitecommunicationssystemswillbeusefulto.
A.laptopcomputerusers
B.remotevillages
C.disaster-reliefteams
D.allabove
17.Satellitetelephonewillmake.
A.businesstravelersusemobilephonesoninternationaltrips
B.possiblecallsfromanywhereonearthtoanywhereelse
C.explorershappy
D.allabove
18.Whichofthefollowingistrue?
A.ThepositioningprecisionofthevoicesystemisbetterthanthatofGPS.
B.ThepositioningprecisionofGPSisBetterthanthatofthevoicesystem.
C.ThepositioningprecisionofthemessagingsystemisbetterthanofGPS.
D.Thepositioningprecisionofvoicesystemisbetterthanthatofthemessagingsystem.
19.Whatcanwesayaboutthenewglobalsatellitecommunicationssystems?
A.Theyarewidelyused.
B.Theyareveryhelpful.
C.Theyarecostly.
D.BothAandB.
20.Whichofthefollowingmaybethebesttitleforthepassage?
A.GlobalSatelliteCommunications
B.NewVoiceandMessagingSystem
C.NewGenerationSatellite
D.AlwaysinTouch
醫患關系三個基本模式是
Passage4
Questions16to20arebasedonthefollowingpassage:
IrecentlywroteanautobiographyinwhichIrecalledmanyoldmemories.Oneofthemwasfrommyschooldays,whenourninthgradeteacher,MissRaber,wouldpickoutwordsfromtheReader’sDigesttotestourvocabulary.
Today,morethan45yearslater,Ialwayscheckout“ItpaystoEnrichYourWordPower”firstwhentheDigestcomeseachmonth.Iamimpressedwiththatidea,wordpower.Reader’sDigestknowsthepowerthatwordshavetomovepeople—toentertain,inform,andinspire.TheDigesteditorsknowthatthebigwordisn’talwaysthebestword.Takejustoneexample,aQuotableQuoteformtheFebruary1985issue:”Timeisaplayfulthing.Itslipsquicklyanddrinksthedaylikeabowlofmilk.”
Nineteenwords,onlytwoofthemmorethanonesyllable,yethowmuchtheyconvey!That’susuallyhowitiswithReader’sDigest.Smallandsimplecanbeprofound.
AschairmanofafoundationtorestoretheStatueofLiberty,I’vebeenmakingalotofspeecheslately.Itrytokeepthemfairlyshort.Iusesmallbutvividwords:wordslike“hope”,“guts”,“faith”,“dreams”.ThosearewordsthatmovepeopleandsaysomuchaboutthespiritofAmerica.
Don’tgetmewrong.I’mnotagainstusingbigwords,whenitisrighttodoso,butIhavealsolearnedthatasmallwordcanworkasmallmiracle—ifit’srightword,intherightplace,attherighttime.It’sa“secret”thatIhopeneverforget.
16.Thepassageismainlyabout.
A.oneofthemanyoldmemories
B.usingsimplewordstoexpressprofoundideas
C.Reader’sDigestandschoolspeeches
D.howtomakeeffectivespeeches
17.ItseemsthatReader’sDigestisamagazinepopularwith.
A.peopleofallagesB.teenagersC.schoolteachersD.elderlyreaders
18.Theexampletheauthorgivesinthesecondparagraphmightmean.
A.onespendshisdayplayinganddrinking
B.don’twasteyourtimeasonedoes
C.timeslipseasilyifyoudon’tmakegooduseofit
D.timeisjustlikedrinkingmilkfromabowl
19.Theauthor’s“secret”is.
A.toavoidusingbigwordsatanytime
B.tousewordsthathavethepowertomovepeople
C.toworkamiraclebyusingasmallword
D.tousesmallandsimplewordswherepossible
20.Accoedingtotheauthor,well-chosenwordscangivepeople.
A.hope,courageandideas
B.confidence,determinationandstrength
C.pleasure,knowledgeandencourage
D.entertainment,informationandpower
Questions16to20arebasedonthefollowingpassage:
