对于理想气体系统来说,在下列过程中,( )过程所吸收的热量、内能增量、对外做功三者皆为负值。

A、等温膨胀
B、等压压缩
C、等容降压
D、绝热膨胀
查看答案
正确答案:

B

答案解析:

暂无解析

上一题
你可能感兴趣的试题

翻译训练:地域特色文明

文明是多彩的,人类文明因多样才有交流互鉴的价值。文明是平等的,人类文明因平等才有交流互鉴的前提。文明是包容的,人类文明因包容才有交流互鉴的动力。

当今世界,人类生活在不同文化、种族、肤色、宗教和不同社会制度所组成的世界里,各国人民形成了你中有我、我中有你的命运共同体。应该推动不同文明相互尊重、和谐共处,让文明交流互鉴成为增进各国人民友谊的桥梁、推动人类社会进步的动力、维护世界和平的纽带。应该从不同文明中寻求智慧、汲取营养,为人们提供精神支撑和心灵慰藉,携手解决人类共同面临的各种挑战。

Passage1

Questions1to5arebasedonthefollowingpassage:

DoyouwanttosaywhatyouthinkinalettertothePresidentoftheUnitedStates?You’llgetareplyfromhim—writteninink,nottyped—afteronlyafewdays.

ThePresidentgetsabout4,000letterseveryweek.HeanswerseveryonewhowritestohimonspecialWhitesHousepaper.Buthedoesn’tneedalotoftimeforit.Infact,heonlygives20minutesaweektolookathispersonalcorrespondence.Hehasthemostmodernsecretaryintheworldtohelphim.

It’scomputer,worth£800,000,whichhasitsownroomsonthefirstflooroftheWhiteHouse.IthasabankofelectronicpenswhichwritelikethePresidentwrites,inhisfavoritelightblueink.EachletterthePresidentreceivesgetsanumber,accordingtothetypeofansweritneeds.Thepensthenwritethecorrectreplyforit,accordingtothenumber.Eachlettertakeslessthanasecondtowrite.AWhiteHouseofficialsaid,“It’snotimportantthatletterscomefromacomputer.EachlettersayswhatthePresidentwantstosay.”

1.forareplyfromthePresident.

A.YouhavetowaitalongtimeB.Youonlyhavetowaitseveraldays

C.YouhavetowaitatleastonemonthD.Youonlyhavetowaitafewweeks

2.ThereplyfromthePresident.

A.isalwaysprintedB.isalwaystyped

C.isalwayswrittenininkD.isalwayswrittenbyhimself

3.Ittakesthecomputertowritetenletters.

A.nomorethantensecondsB.alittlemorethantenseconds

C.lessthantensecondsD.atleastonesecond

4.Thecomputercanbedescribedas.

A.expensivebutefficientB.possessingabeautifulhandwriting

C.heavyandinefficientD.thePresident’smostreliablesecretary

5.Itcanbeinferredfromthepassagethat.

A.thePresidentneverreadsanyletterswrittentohimbyordinarypeople

B.thePresidenthiresaveryefficientsecretarytodealwithhiscorrespondence

C.thePresidentdoesnotreallycareaboutthelettershereceiveseveryweek

D.thePresidentisassuredthatthecomputerexpresshisviewsintheletters

PartIIICloze

Directions:Therearetwentyblanksinthefollowingpassage.Foreachblanktherearefourchoices.ChoosetheonethatbestfitsintothepassageandthenmarksyouranswerontheAnswerSheet.

Whatmakesachildspeakalanguagehaslongbeenapuzzletolinguists.61speaking,therearetwoschoolsoflinguists,bothofwhomtrytoexplain62achildpicksupalanguagesoeasily.Thefactthatachildpicksalanguage63is64:Atoneyearold,achildisabletosay“bye-bye”;attwo,heisabletousefifty;bytherehebeginsto65tenses.ThefamousAmericanlinguistNoamChomsky66thathumanbeinghaveasortofbuilt-insystemforlanguageuse,andthatthe67is68.Childrenarenottaughtlanguage69theyaretaughtarithmetic.Otherlinguists,70,holdtheviewthatachildlearns71ofhislanguagefromthehintsintheenvironment.72,theoristsofbothschools73thatthereisabiologicalbasisforlanguageuse.The74iswhichismoreimportant,theinnerabilityortheenvironment.Thisiscertainlyafield75tobeexplored.Researchersfrombothschoolsarebusyfindingevidenceto76theirowntheory,but77sideispersuadingtheother.

Itseemsthatinorderto78whyachildlearnsalanguagesoeasily,wehaveto79thejointeffortsofbothschools.Somelinguist,likeDeVilliers,hasrecognizedthevalueofcooperation,and80linguistsofbothsidestoworktogether.

61.A.SurprisinglyB.PersonallyC.ProperlyD.Roughly

62.A.thatB.whenC.whyD.how

63.A.independentlyB.naturallyC.withouthelpD.withease

64.A.confusingB.surprisingC.questionedD.suspected

65.A.masterB.studyC.haveD.get

66.A.doubtsB.believesC.realizesD.criticizes

67.A.helpB.teacherC.environmentD.hint

68.A.quiteessentialB.veryimportantC.notnecessaryD.onlysecondary

69.A.asB.forC.whenD.though

70.A.inparticularB.asaresultC.howeverD.therefore

71.A.alittleB.someC.nothingD.most

72.A.BeforeB.FromnowonC.JustnowD.Bynow

73.A.suspectB.disagreeC.agreeD.realize

74.A.caseB.argumentC.problemD.question

75.A.waitingB.planningC.neverD.unlikely

76.A.provideB.createC.supplyD.support

77.A.notaB.oneC.neitherD.either

78.A.findoutB.ruleoutC.searchforD.lookfor

79.A.getridofB.trustinC.relyonD.persistin

80.A.orderedB.criticizedC.challengedD.urged

Passage2

Questions6to10arebasedonthefollowingpassage:

Inordertolearntobeone’strueself,itisnecessarytoobtainawideandextensiveknowledgeofwhathasbeensaidanddoneintheworld;criticallytoinquireintoit;carefullytoconsiderit;clearlytoanalyzeit;andearnestlytocarryitout.

Itmattersnotwhatyoulearn,butwhenyouoncelearnathing,youmustnevergiveitupuntilyouhavemasteredit.Itmattersnotwhatyouinquireinto,butwhenyouonceinquireintoathing,youmustnevergiveitupuntilyouhavethoroughlyunderstoodit.Itmattersnotwhatyoutrytothinkout,butwhenyouoncetrytothinkoutathing,youmustnevergiveitupuntilyouhavegotwhatyouwant.Itmattersnotwhatyoutrytocarryout,butwhenyouoncecarryoutathing,youmustnevergiveitupuntilyouhavedon’titthoroughlyandwell.

Ifanothermansucceedsbyoneeffort,youwilluseahundredefforts.Ifanothermansucceedsbytenefforts,youwilluseathousand.

6.Accordingtotheauthor,firstofallonemust.

A.analyzeB.inquireC.obtainknowledgeD.act

7.Accordingtotheauthor,.

A.learningisnotimportantB.thinkingisnotnecessary

C.knowledgemeanslittleD.itisnotimportantwhatwelearn

8.Theendoflearningshouldbe.

A.thoughtB.masteryC.inquiryD.analysis

9.Accordingtotheauthor,anotherman’ssuccessshould.

A.makegreatereffortsB.makeusnervous

C.notbetakenintoconsiderationD.causeonetostoptrying

10.Theauthorimpliesbutdoesnotsaywhat.

A.thewaytoknowledgeisthroughspecialization

B.onehastoknoweverythingtobesuccessful

C.successdependsnotsomuchonnaturalabilityasitdoesoneffort

D.successinone’sprofessionislatestimportantinone’slife

肾上腺素使用指征?

A、正压人工呼吸后,心率持续低于100次/min。
B、正压人工呼吸30s后,心率持续低于60次/min,然后正压人工呼吸和胸外按压30s后,心率仍然低于60次/min。
C、新生儿出生后心率为0。
D、在30s的正压人工呼吸和30s正压人工呼吸和胸外按压后,心率从40次/min上升至80次/min。
热门试题 更多>
相关题库更多>
专业知识(暖通空调)
基础考试(暖通空调)
专业知识(给排水)
基础考试(给排水)
试卷库
试题库