考研英语知识运用分类精讲科学技术类分类模拟(三)SectionUseofEnglishⅠOnereasonhumanbeingscanthriveinallkindsofclimatesisthattheycancontrolthequalitiesoftheairintheenclosedspacesinwhichtheylive.Airconditioningistheuseofmechanicalsystemsto(1)thatcontrolinsuchplaces(2)homes,offices,theaters,institutions,factories,airplanes,andautomobiles.Themostfamiliartypeofairconditioningissummertimecooling.Althoughimportant,thisis(3)oneofseveralaspectsofairconditioning.Otherapplications(4).thecontrolofthehumidity(orairmoisture),cleanliness,circulationoftheair,andheating.Testshave(5)thatpeoplegenerallyfeelbest(6)certaintemperature,humidity,andairvelocityconditions.Temperaturescan(7)from21.5°Cwith70percentrelativehumidityto28°Cwith30percentrelativehumidity.Relativehumidityisthe(8)ofmoistureintheair(9)aspecifictemperaturecompared(10)theamountitcouldholdatthattemperature.(11)airvelocitiesrangefrom4.5to10.5metersperminute.Itisalsodesirablethatanairconditioner(12)dust,pollen,smoke,andodorsfromtheair.Inmanyindustrialenvironments,airconditioningisessential.Mostprintshops,forexample,(13)constanthumidityinordertocontrolpapershrinkageand(14)the(15)operationinsomeprocesses.Libraries,especiallyoneswithrarebooks,requireaircontrolto(16)thephysicalqualityoftheircollections.Bakeriesandthetobaccoandcottonindustriesrequirehighhumidity(17)theirproducts,andperishablessuchasfruitsmustbestoredincool,dryrooms.Someelectroniccomponents,drugs,andchemicalsmustbemanufactured(18)theairisasfreeaspossible(19)dustandotherparticles.Airconditioningis(20)inhospitals,especiallyinoperatingrooms.1、A.achieveB.availC.amounttoD.assign2、A.likeB.asC.forD.to3、A.butB.likeC.astoD.mere4、A.includeB.concludeC.consistD.compromise5、A.determinedB.causedC.maintainedD.achieved6、A.atB.aroundC.withinD.under7、A.alterB.rangeC.differD.move8、A.qualityB.sumC.amountD.number9、A.underB.insideC.onD.at10、A.toB.withC.againstD.at11、A.AgreeableB.AppreciableC.AmenableD.Available12、A.removeB.toremoveC.removesD.removing13、A.askB.demandC.requestD.require14、A.ensuresB.ensureC.ensuringD.toensure15、A.uniqueB.uniformC.universalD.united16、A.preserveB.conserveC.reserveD.retain17、A.aboutB.asC.forD.to18、A.whatB.whereC.thatD.which19、A.ofB.againstC.atD.without20、A.virtualB.viableC.vibrantD.vitalAdultstypicallyneedseventoninehoursofsleepeachnighttofeelfullyrestedandfunctionattheirbest.(1),Americansaregettinglesssleepthantheydidinthepast.A2005NationalSleepFoundationpollfoundthatAmericans(2)6.9hoursofsleeppernight,whichrepresentsadropofabouttwohourspernight(3)the19thcentury,onehourpernightoverthepast50years,andabout25minutespernightjustsince2001.(4),wearenotverygoodatperceivingthe(5)effectsofsleepdeprivation.ResearchersattheUniversityofPennsylvaniarestricted(6)tolessthansixhoursinbedpernightfortwoweeks.Thevolunteers(7)onlyasmallincreaseinsleepinessandthoughttheywere(8)relativelynormally.However,formaltestingshowedthattheircognitiveabilitiesandreactiontimes(9)declinedduringthetwoweeks.Bytheendofthetwo-weektest,theywereas(10)assubjectswhohadbeerawake(11)for48hours.ArecentreviewbyateamfromCaseWesternReserveUniversityandHarvardMedicalSchoolfoundthatallofthelargestudiesthatfollowedpeopleovertimeagreedthatshortsleepdurationwas(12)withfutureweightgain.Thisconnectionwas(13)stronginchildren:all31studiesinchildrenshowedastrongassociationbetweenshortsleep(14)andc...