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。

A、只有(2)、(4)正确
B、只有(2)、(3)、(4)正确
C、只有(1)、(3)、(4)正确
D、全部正确
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正确答案:

A

答案解析:

暂无解析

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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。

Wouldhehaveseenyouifyouhadn’t_____tohim?

A、intended
B、waved
C、expressed
D、debt

子宫病理收缩环是指

A、子宫上下段之间形成缩窄环并随宫缩渐次上升
B、子宫某部肌肉呈不协调收缩形成环状狭窄
C、子宫上下段之间形成环,但不随宫缩而上升
D、宫缩时硬,子宫松弛时为软
E、常发生于孕期
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