关于热功转换和热量传递过程,有下面一些叙述:(1) 功可以完全变为热量,而热量不能完全变为功;(2) 一切热机的效率都不可能等于1;(3) 热量不能从低温物体向高温物体传递;(4) 热量从高温物体向低温物体传递是不可逆的。以上这些叙述,只有()是正确的。
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PartIIVocabularyandStructure
Directions:Inthisparttherearefortyincompletesentences.Eachsentenceisfollowedbyfourchoices.ChoosetheonethatbestcompletesthesentenceandthenmarkyouranswerontheAnswerSheet.
21.thedifficultiesassociatedwiththeproject,we’llgoonwithit.
A.GivenB.InspiteofC.ThanktoD.Becauseof
22.Itwasalmostdarkinthestreetsafewverypowerfulspotlights.
A.excludingB.butforC.exceptD.exceptfor
23.today,hewouldgettherebyFriday.
A.WouldheleaveB.Ifheleaves
C.WasheleavingD.Werehetoleave
24.Hegavemesomeveryadviceonbuyingahouse.
A.preciousB.expensiveC.wealthyD.dear
25.Hisgoalisnottobecomeasportsman,achampioninacertainfield.
A.butratherbecameB.butrathertobecome
C.butratherbecomingD.butrathertobecoming
26.Ijustmetheronthewayhomefromthebookstore.
A.onpurposeB.byaccidentC.inaccidentD.incase
27.Idon’tknowabouthim,commentonhimbehindhisback.
A.letaloneB.letgoC.leavealoneD.takeleave
28.Mytransistorradioisoutoforder.It.
A.needtoberepairedB.needrepairing
C.needsrepairingD.needstorepair
29.Noonecouldtellusanythingaboutthestranger.
A.consciousB.mysteriousC.seriousD.previous
30.Maryallfoolishcommentsandkeptonworking.
A.excludedB.ignoredC.deniedD.discharged
31.Iagreewithhim,butnotentirely.
A.untilacertainpointB.tosomepoint
C.tosomeextentD.untilacertainextent
32.Peopleinsomepartsoftheworldoftentaketheirwaterfor.theyuseasmuchwaterastheywish.
A.grantedB.sureC.certainD.pleasure
33.Color-blindpeopleoftenfinditdifficulttobetweenblueandgreen.
A.separateB.compareC.contrastD.distinguish
34.Thousandsofpeopleonthecitytowelcomethevisitingguests.
A.turnedoffB.turnedupC.turnedoutD.turnedover
35.Themountainplaceisbeautiful,buttheworkingconditions,it’sterrible.
A.whenmentionedB.whenitcomesto
C.whenitissaidD.whenitdiesto
36.Areyouspendingmoremoneyonthespaceprogram?
A.infavorofB.byfavorofC.infavortoD.outoffavor
37.Intheofmyparents,standardsofeducationinthepublicschoolareactuallyfalling.
A.ideaB.thoughtC.opinionD.principle
38.fromspace,ourearth,withwatercovering70%ofitssurface,appearsasa“blueplanet”.
A.SeeingB.TobeseenC.SeenD.havingseen
39.Thisyear’stotaloutputvalueofindustryandagriculturewillincrease5percentoverlastyears.
A.byB.toC.ofD.with
40.Maryisthetopstudentintheclass.Shestudiesharder.
A.thananystudentB.thanallthestudents
C.thananyotherstudentD.thansomeotherstudent
41.Manypeoplehaveappliedfortheposition.
A.emptyB.bareC.vacantD.blank
42.Mynewshoescostme50yuan(RMB).ThepricewasthatthelastpairIboughtamonthago.
A.twotimemorethanB.twiceasmuchas
C.astwiceD.asmuchastwice
43.Almosteveryonefailedonthefirstday.
A.passhisdriver’stestB.tohavepassedhisdriver’stest
C.topasshisdriver’stestD.passinghisdriver’stest
44.Overthetraditionalfestivalpeoplevisiteachotherandgreetings.
A.exchangeB.wishC.congratulateD.present
45.Itwasbecausehewastiredoutthathefellasleepstandingup.
A.publiclyB.openlyC.speciallyD.obviously
46.Theyoungmanwasaccusedoftheladyofhermoney.
A.stealingB.robbingC.takingD.grasping
47.NomatterwhereourPartyneedsus,wewillhercall.
A.giveanswerforB.respondto
C.haveresponsetoD.answerto
48.Itisastonishingthatapersonofyourintelligencebecheatedsoeasily.
A.couldB.shouldC.mightD.would
49.Wewerecompletelywhenwefinallyreachedthedestination.
A.wornoffB.worndownC.wornoutD.wornaway
50.Manythingsimpossibleinthepastarecommontoday.
A.consideredB.toconsiderC.consideringD.tobeconsidered
51.Notuntilmanyyearslaterknown.
A.wasthewholetruthbecomeB.didthewholetruthbecome
C.thewholetruthbecameD.thewholetruthhadbecame
52.Wedidn’tknowhistelephonenumber,otherwisewehim.
A.wouldtelephoneB.wouldhavetelephoned
C.hadtelephonedD.musthavetelephoned
53.Thereisnopointwithhim,sincehehasalreadymadeuphismind.
A.argueB.toargueC.inarguingD.ofarguing
54.Iappreciatethatletterforme.
A.youtowriteB.yourwritingC.youwriteD.thatyouwriting
55.I’dliketoaspecialseatfortheconnectofMay5.
A.serveB.reserveC.preserveD.conserve
56.thatsoniswellagain,younolongerhaveanythingtoworryabout.
A.SinceB.NowC.WhenD.After
57.Generallyspeaking,allkindsofmaterialswillexpandwhenheatedbutwillwhencooled.
A.contrastB.contractC.surviveD.return
58.Youwon’tknowifitfitsyouuntilyouiton.
A.willtryB.aretryingC.aretotryD.havetried
59.Afteralleffortsinvain,hehadtoaccepttheresult.
A.regularlyB.shallowlyC.physicallyD.painfully
60.Therestofhislifeistothecauseofinternationalexchangesofvisitingscholars.
A.addedB.putC.savedD.committed
ThediscoveryoftheAntarcticnotonlyprovedoneofthemostinterestingofallgeographicaladventures,butcreatedwhatmightbecalled“theheroicageofAntarcticexploration”.Bytheirtremendousheroism,mensuchasShakleton,Scott,andAmundsencausedanewcontinenttoemergefromtheshadows,andyetthatheroicage,littlemorethanacenturyold,isalreadypassing.Modernscienceandinventionsarerevolutionizingtheendurance,futurejourneysintotheseicywasteswillprobablydependonmotorvehiclesequippedwithcaterpillartractionratherthanonthedogsthatearlierdiscoverersfoundsoinvaluableandhardlycomparable.
FewrealizethatthisAntarcticcontinentisalmostequalinsizetoSouthAmerica,andenormousfieldofworkawaitsgeographersandprospectors.Thecoastsofthiscontinentremaintobeaccuratelycharted,andthemapingofthewholeoftheinteriorpresentsaformidabletasktothecartographerswhoundertakethework.Oncetheirlaborsarecompleted,itwillbepossibletoprospectthevastnaturalresourceswhichscientistsbelievewillfurnishoneofthelargesttreasurehoardsofmetalsandmineralstheworldhasyetknown,andalmostinexhaustiblesourcesofcopper,coal,uranium,andmanyotheroreswillbecomeavailabletoman.SuchdiscoverieswillusherinaneraofpracticalexploitationoftheAntarcticwastes.
Thepolardarknesswhichhidesthiscontinentforthesixwintermonthswillbedefeatedbyhugebatteriesoflight,andmakepossibletheestablishingofair-fieldsforthefutureinter-continentalairservicesbymakingtheseareasaslightasday.Presentflyingrouteswillbecompletelychanged,fortheAntarcticrefuelingbaseswillmakeflightsfromAustraliatoSouthAmericacomparativelyeasyoverthe5,000milesjourney.
Theclimateisnotlikelytoofferaninsuperableproblem,fortheexplorerAdmiralByrdhasshownthattheclimateispossibleevenformencompletelyuntrainedforexpeditionsintothosefrozenwastes.Someofhispartiesweremenwhohadneverseensnowbefore,andyetherecordsthattheysurvivedtherigorsoftheAntarcticclimatecomfortably,sothat,providedthattheappropriateinstallationsaremade,wemayassumethathumanbeingsfromallcountriescouldlivetheresafely.Byrdevenaffirmsthatitisprobablythemosthealthyclimateintheworld,fortheintensecoldofthousandsofyearshassterilizethiscontinent,andrendereditabsolutelygermfree,withtheconsequencesthatordinaryandextraordinarysicknessanddiseasesfromwhichmansuffersinotherzoneswithdifferentclimatesarehereutterlyunknown.Thereexistnoproblemsofconservationandpreservationoffoodsupplies,forthelatterkeepindefinitelywithoutanysignsofdeterioration;itmayevenbethatlatergenerationswillcometoregardtheAntarcticasthenaturalstorehouseforthewholeworld.
Plansarealreadyonfoottosetuppermanentbasesontheshoresofthiscontinent,andwhatsofewyearsagowasregardedasa“deadcontinent”nowpromisestobeamostactivecenterofhumanlifeandendeavor.
1.WhendidmanbegintoexploretheAntarctic?
A.About100yearsago.
B.Inthiscentury.
C.Atthebeginningofthe19thcentury.
D.In1798.
2.Whatmusttheexplorersbe,eventhoughtheyhavemodernequipmentandtechniques?
A.Braveandtough
B.Stubbornandarrogant.
C.Well-likedandhumorous.
D.Stoutandsmart.
3.Themosthealthyclimateintheworldis___.
A.inSouthAmerica.
B.intheArcticRegion.
C.intheAntarcticContinent.
D.intheAtlanticOcean.
4.WhatkindofmetalsandmineralscanwefindintheAntarctic?
A.Magnetite,coalandores.
B.Copper,coalanduranium.
C.Silver,naturalgasanduranium.
D.Aluminum,copperandnaturalgas.
5.Whatisplannedforthecontinent?
A.Buildingdamsalongthecoasts.
B.Settingupseveralsummerresortsalongthecoasts.
C.Mappingthecoastandwholeterritory.
D.Settinguppermanentbasesonthecoasts.
PartVWriting
Directions:InthispartyouarerequiredtowriteanessayaboutSavingEnergiesandResources.Youshouldwriteatleast120wordsandbaseyourcompositionontheoutline(giveninChinese)below:
1、随着社会的发展,厉行节约越来越重要;
2、生活中许多方面都可以节约;
3、每个人都应该养成节约的好习惯。
子宫病理收缩环是指