简述汽车空调系统内平衡式膨胀阀的作用及工作原理?
使用及工作原理: 当蒸发器出口温度增加, 感温包即可感知包内和毛细管内的气体膨胀,推动膨胀阀中的膜片向下移动,推动推力杆、球阀克服弹簧压力,打开阀门,使制冷剂流量增加,离开蒸发器的制冷剂流量增加时,其温度下降,感温包感知后,内部气体膜片上的压力减小,使阀门关闭。
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Readthetextaboutcareer-planningservices.
Choosethebestsentencefromtheoppositepagetofilleachofthegaps.
Foreachgap9–14,markoneletter(A-H)onyourAnswerSheet.
Donotuseanylettermorethanonce.
Thereisanexampleatthebeginning.(0)
YourCareerPathCanLeadYouAnywhere
Weusedtobeadvisedtoplanourcareers.Weweretoldtomakeaplanduringthelaterstagesofoureducationandcontinuewithitthroughourworkinglives.(0)_____somepeoplestillseecareersinthisway.However,topursueasingleoptionforlifehasalwaysbeenunrealistic.
Planningforasinglecareerassumesthatwesetoutwithafullunderstandingofourlikesanddislikesandtheemploymentopportunitiesopentous.(9)____Formostpeoplethisdegreeofcertaintyaboutthefuturedoesnotexist.
Ourinitialchoiceofcareerpathandemployerisoftenbasedoninadequateknowledgeandfalseperceptions.Butwithageandexperience,wedevelopnewinterestsandaptitudesandourprioritiesalter.Thestructureoftheemploymentmarketand,indeedofemploymentitself,issubjecttochangeasbothnewtechnologiesandnewworksystemsareintroduced(10)_____Wemustfacetheuncertaintiesofaportfoliocareer.
Itisclearfromtherecentpastthatwecannotforeseethechangeswhichwillaffectourworkinglives.Thepaceofchangeisaccelerating,asaresultofwhichtraditionalcareerplanswillbeofverylimiteduse.(11)_____Theywillneedupdatingtoreflectchangesinourowninterestsaswellasintheexternalworkenvironment.Flexibleworkersalreadyaccountforabouthalftheworkforce.(12)______Wearelikelytofaceperiodsascontractworkers,self-employedfreelances,consultants,tempsorpart-timers.
Manyemployersencouragestafftowriteapersonaldevelopmentdevelopment(PDP)(13)_____Althoughsomepeopleuseitonlytoreviewtheskillsneededfortheirjob,aPDPcouldbethenucleusofwidercareerplan–settingoutalternativelong-termlearningneedsandaplanofself-development.
AreportissuedbytheInstituteofEmploymentStudiesadvisespeopletoenhancetheiremployabilitybymovingfromtraditionaltechnicalskillstowardstheattainmentofarangeoftransferableskills.(14)_____Instead,specialschemesshouldbeestablishedtoencouragepeopletoexaminetheireffectivenessandtoconsiderawiderrangeofneeds.
0ABCDEFGH
AThisdualeffectmeansthattherelationshipbetweenemployersandworkershasevolvedtosuchandextentthatwecannolongerexpectalong-termrelationshipwithoneemployer.
B.Itcarriesanimplicitassumptionthatweourselves,andthejobsweenter,willchangelittleduringourworkinglives.
C.Thisgrowthsuggeststhatacareerplanshouldnotbeexpressedonlyintermsoffull-timeemploymentbutshouldmakeprovisionforthepossibilityofbecomingoneofthe.
Dthisisasummaryofone’spersonallearningneedsandanactionplantomeetthem.
EConsequently,theymustnowaccommodateanumberofobjectivesandenableustoprepareforeachonacontingencybasis.
FHowever,itwarnsthatemployersoftenidentifytrainingneedsthroughformalappraisals,whichtaketoonarrowaviewofdevelopment.
G.Suchafreelanceofconsultantwouldbeconstantlyindemand.
HWewereexpectedtoworktowardsthatonecleargoalandtoconsideracareerchangeasabadthing.
_____employment,youshouldfirstsitdownandwriteoutalistofjobsyoufeelqualifiedtoperformandinterestedin.
Afriendofminewasfondofdrawinghorse.Hedrewthehorsesverywell,buthealwaysbeganthetail.NowitistheWesternruletobeginattheheadofthehorse,thatiswhyIwassurprised.Itstruckmethatitcouldnotreallymakeanydifferencewhethertheartistbeginsattheheadorthetailorthebelly(肚子)orthefootofthehorse,ifhereallyknowshisbusiness.Andmostgreatartistswhoreallyknowtheirbusinessdonotfollowotherpeople’srule.Theymaketheirownrules.Everyoneofthemdoeshisworkinawaypeculiar(奇特的)tohimself;andthepeculiaritymeansonlythathefindsitmoreeasytoworkinthatway.
Nowtheverysamethingistruetoliterature(文学).Andthequestion,"HowshallIbegin?"onlymeansthatyouwanttobeginattheheadinsteadofbeginningatthetailorsomewhereelse.Thatis,youarenotyetexperienced(有经验的)enoughtotrusttoyourownpowers.Whenyoubecomemoreexperiencedyouwill
neveraskthequestion,andIthinkthatyouwilloftenbeginatthetail--thatistosay,youwillwritetheendofthestorybeforeyouhaveeventhoughtofthebeginning.
1.Afriendofthewriter’sdrewthehorses____.
A.verywell
B.inthewayofwesternrule
C.inthewayofhisownrule
D.alloftheabove
2.Thewriterwassurprisedbecause____.
A.theartistbegantodrawattheheadofthehorse
B.theartistbegantodrawatthetailofthehorse
C.theartistmadehisownrule
D.theartistdidnotfollowotherpeople’srule
3.Youarenotyetexperiencedbecause____.
A.youdon’tknowwheretobegin
B.youwanttobeginattheheadinsteadofbeginningatthetail
C.youalwaysaskedquestion
D.youdonottrusttoyourownpowers
4.Whenyoubecomemoreexperiencedyouwill____.
A.neveraskquestion
B.oftenbeginatthetail
C.shouldwritetheendofthestory
D.shouldthinkofthebeginning
5.Thetopicofthepassageis______.
A.Howtodrawahorse
B.Howtowriteastory
C.Howtomakeyourownrules
D.Trusttoyourownpowers
StudentswanttokeeptheSelf-AccessCentrebecause____.
Yourdonationscan_____poorchildren____foodandachancetostudy.