感应型电流继电器的检验项目有哪些?-查字典考试网

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通风使井下风流处于负压状态。

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立法机关经立法程序制定、认可的法律，才有实施保证；而群众组织、社会团体的文件，不具有国家强制力的保证。

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建设完善煤矿井下安全避险“六大系统”指的是哪六大系统?

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安全与生产的关系是，生产是目的，安全是前提，安全为了生产，生产必须安全。

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额定速度大于0.63m/s小于1m/s的交流双速电梯轿厢平层准确度最大偏差为（）

A、±30；
B、±15；
C、±10
D、±20

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Anincreasingnumberofmuseumstendtochargeadmissionfeesfromtouristsratherthanprovidingservicefreeofcharge.Doyouthinktheadvantagesoutweighthedisadvantages?
Forexample,itisestimatedthatSASturnoverrateis4percentcomparedtotheindustrynormofmorethan20percentperyear.
Don'twashthosefossils! StandardmuseumpracticecanwashawayDNA. 1.Washing,brushingandvarnishingfossils—allstandardconservationtreatmentsusedbymanyfossilhuntersandmuseumcuratorsalike—vastlyreducesthechancesofrecoveringancientDNA. 2.Instead,excavatorsshouldbehandlingatleastsomeoftheirbountywithgloves,andfreezingsamplesastheyarefound,dirtandall,concludesapaperintheProceedingsoftheNationalAcademyofSciencestoday. 3.AlthoughmanypalaeontologistsknowanecdotallythatthisisthebestwaytouptheoddsofextractinggoodDNA,Eva-MariaGeigloftheJacquesMonodInstituteinParis,France,andhercolleagueshavenowshownjusthowimportantconservationpracticescanbe.Thisinformation,theysay,needstobehammeredhomeamongthepeoplewhoareactuallyoutinthefielddiggingupbones. 4.Geiglandhercolleagueslookedat3,200-year-oldfossilbonesbelongingtoasingleindividualofanextinctcattlespecies,calledanaurochs.ThefossilsweredugupatasiteinFranceattwodifferenttimes—eitherin1947,andstoredinamuseumcollection,orin2004,andconservedinsterileconditionsat-20oC. 5.Theteam'sattemptstoextractDNAfromthe1947bonesallfailed.Thenewlyexcavatedfossils,however,allyieldedDNA. 6.Becausetheboneshadbeenburiedforthesameamountoftime,andinthesameconditions,theconservationmethodhadtobetoblamesaysGeigl."AsmuchDNAwasdegradedinthese57yearsasinthe3,200yearsbefore,"shesays. Washin,washout 7.Becausemanypalaeontologistsbasetheirworkontheshapeoffossilsalone,theirmethodsofconservationarenotdesignedtopreserveDNA,Geiglexplains. 8.Thebiggestproblemishowtheyarecleaned.Fossilsareoftenwashedtogetheron-siteinalargebath,whichcanallowwater—andcontaminantsintheformofcontemporaryDNA—topermeateintotheporousbones."NotonlyistheauthenticDNAgettingwashedout,butcontaminationisgettingwashedin,"saysGeigl. 9.MostancientDNAspecialistsknowthisalready,saysHendrikPoinar,anevolutionarygeneticistatMcMasterUniversityinOntario,Canada.Butthatdoesn'tmeanthatbestpracticehasbecomewidespreadamongthosewhoactuallyfindthefossils. 10.GettingholdoffossilsthathavebeenpreservedwiththeirDNAinmindreliesoncloserelationshipsbetweenlab-basedgeneticistsandtheexcavators,sayspalaeogeneticistSvantePbooftheMaxPlanckInstituteforEvolutionaryAnthropologyinLeipzig,Germany.Andthatonlyoccursinexceptionalcases,hesays. 11.Pbo'steam,whichhasbeensequencingNeanderthalDNA,continuallyfacestheseproblems."WhenyouwanttostudyancienthumanandNeanderthalremains,there'sabigissueofcontaminationwithcontemporaryhumanDNA,"hesays. 12.Thisdoesn'tmeanthatallmuseumspecimensarefatallyflawed,notesPbo.TheNeanderthalfossilsthatwererecentlysequencedinhisownlab,forexample,hadbeenpartofamuseumcollectiontreatedinthetraditionalway.ButPboiskeentoseesamplesoffossilsfromeverymajorfindpreservedinlinewithGeigl'srecommendations—justincase. Warmandwet 13.Geiglherselfbelievesthat,withcooperationbetweenbenchandfieldresearchers,preservingfossilsproperlycouldopenupavenuesofdiscoverythathavelongbeenassumedclosed. 14.Muchhumanculturaldevelopmenttookplaceintemperateregions.DNAdoesnotsurvivewellinwarmenvironmentsinthefirstplace,andcanvanishwhenfossilsarewashedandtreated.Forthisreason,Geiglsays,mostancientDNAstudieshavebeendoneonpermafrostsamples,suchasthewoollymammoth,oronremainsshelteredfromtheelementsincoldcaves—includingcavebearandNeanderthalfossils. 15.Betterconservationmethods,andafocusonfreshfossils,couldboostDNAextractionfrommoredelicatespecimens,saysGeigl.Andthatcouldshedmorelightonthestoryofhumanevolution. (640wordsnature) Glossary Palaeontologists古生物学家 Aurochs欧洲野牛 Neanderthal(人类学)尼安德特人，旧石器时代的古人类。 Permafrost(地理)永冻层 Questions1-6 AnswerthefollowingquestionsbyusingNOMORETHANTHREEWORDSforeachanswer. 1.Howdidpeopletraditionallytreatfossils? 2.WhatsuggestionsdoGeiglandhercolleaguesgiveonwhatshouldbedonewhenfossilsarefound? 3.Whatproblemsmaybeposediffossilbonesarewashedon-site?NameONE. 4.WhatcharacteristicdofossilboneshavetomakethemsusceptibletobecontaminatedwithcontemporaryDNAwhentheyarewashed? 5.Whatcouldbebetterunderstoodwhenconservationtreatmentsareimproved? 6.Thepassagementionedseveralanimalspeciesstudiedbyresearchers.Howmanyofthemarementioned? Questions7-11 Dothefollowingstatementsagreewiththeinformationgiveninthepassage?PleasewriteTRUEifthestatementagreeswiththewriterFALSEifthestatementdoesnotagreewiththewriterNOTGIVENifthereisnoinformationaboutthisinthepassage. 7.IntheirpaperpublishedintheProceedingsoftheNationalAcademyofSciences，GeiglandhercolleagueshaveshownwhatconservationpracticesshouldbefollowedtopreserveancientDNA. 8.ThefossilbonesthatGeiglandhercolleaguesstudiedareallfromthesameaurochs. 9.Geneticistsdon'thavetoworkonsite. 10.OnlynewlyexcavatedfossilbonesusingnewconservationmethodssuggestedbyGeiglandhercolleaguescontainancientDNA. 11.Paaboisstillworriedaboutthepotentialproblemscausedbytreatmentsoffossilsintraditionalway. Questions12-13 CompletethefollowingthestatementsbychoosingletterA-Dforeachanswer. 12.“Thisinformation”inparagraph3indicates: [A]ItiscriticaltofollowproperpracticesinpreservingancientDNA. [B]ThebestwayofgettinggoodDNAistohandlefossilswithgloves. [C]Fossilhuntersshouldwearhome-madehammerswhilediggingupbones. [D]Manypalaeontologistsknowhowoneshoulddointreatingfossils. 13.ThestudyconductedbyGeiglandhercolleaguessuggests: [A]thefactthatancientDNAcannotberecoveredfromfossilbonesexcavatedinthepast. [B]thecorrelationbetweentheamountofburyingtimeandthatoftherecoveredDNA. [C]thepaceatwhichDNAdegrades. [D]thecorrelationbetweenconservationpracticesanddegradationofDNA.
Wehopedthatthisdisputecanbesettledthroughfriendlynegotiationwithoutbeingsubmitforarbitration.
Inordertohelpyoutodevelopbusinessinthisline,wearepreparetoofferyouadiscountof5%.
SectionD Evenifyougetworkdoneandgenerallygetalongwithco-workers,youcouldhavehabitsthatbugyourboss(nottomentionyourofficemates).Whilethesequirksmaynotnecessarilygetyoufired,theycertainlycankeepyoufromclimbingthecorporateladder.We’veuncoveredanumberofhabitsthatbugyourbossandoffertipsonhowtoavoidthem. AccordingtoLaRhondaEdwards,ahumanresourcesmanagerwiththirteenyearsofHRexperience,tardinessisoneofthebiggestconcernsformanagers.“Ifthenormalworkdaystartsat8o’clock,thentheexpectationisthatyou’reintheofficereadytostartyourday,”sheexplains.Heradvicetothechronicallylate?“Planahead,”sheurges.“Ifyoulive50minutesaway,youdon’tleave50minutesearly.Tagonextratimeandanticipateroadblocks.”Somepeopleevensettheirclocksafewminutesearlytoensurethatthey’reontime.Differentbossespreferdifferentmodesofcommunication.LindseyPollak,aworkplaceexpertandauthorofGettingfromCollegetoCareer,saysifyoutextyourbossandsheprefersin-personmeetings,“eitheryourinformationwon’tgetacrossoryou’llirritate[her].”Fortunately,there’sasimplefix:askyourbosshowandwhentosendupdates.Ifyou’retooshytoaskoutright,thenPollaksuggestsobservinghowtheycommunicatewithyou.“Ifyouhaveabosswhocommunicatesonceadaybyemail,that’stheboss’preferredfrequencyandmethodofcommunication,”explainsPollak. Acluttered,messyworkspacecangiveyourbosstheimpressionthatyou’relazyordisorganized,sotrytokeepyourdeskneat.“Neverputmoreonyourdeskthanyou’regoingtoworkonfortheday,”recommendsEdwards.“Attheendoftheday,makesureyousetupforthenextday.Imaybeworkingonfivethingsatonce,butattheendoftheday,they’regone,andIsetupforthenextday.”Mostmanagerswouldratheryouaskaquestionthanmakeamistake,butmanyquestionscanbeansweredonyourown.“IsthissomethingyoucouldGoogleoraskacolleague?”wondersPollak.“Theinternetissovastthatalotofinformationyoucangetyourself.”Ifyoumustapproachyourbosswithaquestionorissue,thenPollakrecommendsbrainstormingbeforehand.“Ratherthansaying‘Thisclientisterrible.WhatshouldIdo?’thinkaboutpotentialsolutions,”shesays. Cellphonesarepracticallyubiquitousintheworkplacethesedays,butit’sstilldisruptiveanddisrespectfulwhentheygooffduringameeting.Edwardssaysthatyoushould,“putyourcellphoneonvibrateorleaveitinyourownofficesoit’snotadistraction.”Thatwayyouwon’tbetemptedtotexteither ()6.Accordingtothearticle,howmanypiecesofadviceareofferedhere?. A.TwoB.ThreeC.FourD.Five(B) ()7.Whatisthisarticleabout?. A.Howtobesuccessfulintheworkplace. B.Howtocommunicatewithyourboss. C.Howtoavoidquirksthatannoyyourboss. D.Howtoutilizeyourmobilephonesatwork. ()8.Whatdoesthephrase“togetacross”inthesentence“…sheprefersin-personmeetings,“eitheryourinformationwon’tgetacrossoryou’llirritate…”ofthesecondparagraphmean?. A.TobecommunicatedB.Tobepassed C.TobepromotedD.Tobeanticipated(A) ()9.Accordingtothearticle,whichofthefollowingmodesofcommunicationisthebestwhencommunicatingwithyourboss?. A.Anywaysyouthinkareappropriate. B.In-personmeetings. C.Correspondence. D.Thewayyourbosscommunicateswithyou.(D) ()10.Whichofthefollowingstatementsisnotmentioned? A.Employeesshouldpayrespecttotheirbossesanytime. B.Employeesshouldplanbeforehandsoastoshowupatworkontime. C.Employeesshouldnotlettheirmobilephonesgooffduringmeetings. D.Employeesshouldkeeptheirdesksneatandorganized.
Welookforwardtoyourearlyreplyandtrustthatthroughourmutuallycooperationweshallbeabletoconcludethistransactionwithyouinthenearfurther.
Ihopedwecancooperatehappily.
Todayconsumersarefacinganincreasingamountofadvertisingfromcompetingcompanies.Towhatextentdoyouthinkconsumersareinfluencedbyadvertisements?Whatmeasurescanbetakentoprotectthem?
1.AEuropeanspacecrafttookofftodaytospearheadthesearchforanother"Earth"amongthestars. 2.TheCorotspacetelescopeblastedoffaboardaRussianSoyuzrocketfromtheBaikonurcosmodromeinKazakhstanshortlyafter2.20pm. 3.Corot,shortforconvectionrotationandplanetarytransits,isthefirstinstrumentcapableoffindingsmallrockyplanetsbeyondthesolarsystem.Anysuchplanetsituatedintherightorbitstandsagoodchanceofhavingliquidwateronitssurface,andquitepossiblylife,althoughaleadingscientistinvolvedintheprojectsaiditwasunlikelytofind"anylittlegreenmen". 4.DevelopedbytheFrenchspaceagency,CNES,andpartneredbytheEuropeanSpaceAgency(ESA),Austria,Belgium,Germany,BrazilandSpain,Corotwillmonitoraround120,000starswithits27cmtelescopefromapolarorbit514milesabovetheEarth.Overtwoandahalfyears,itwillfocusonfivetosixdifferentareasofthesky,measuringthebrightnessofabout10,000starsevery512seconds. 5."Atthepresentmomentwearehopingtofindoutmoreaboutthenatureofplanetsaroundstarswhicharepotentialhabitats.Wearelookingathabitableplanets,notinhabitedplanets.Wearenotgoingtofindanylittlegreenmen,"ProfessorIanRoxburgh,anESAscientistwhohasbeeninvolvedwithCorotsinceitsinception,toldtheBBCRadio4Todayprogramme. 6.ProfRoxburghsaiditwashopedCorotwouldfind"rockyplanetsthatcoulddevelopanatmosphereand,iftheyaretherightdistancefromtheirparentstar,theycouldhavewater". 7.Tosearchforplanets,thetelescopewilllookforthedimmingofstarlightcausedwhenanobjectpassesinfrontofastar,knownasa"transit".Althoughitwilltakemoresophisticatedspacetelescopesplannedinthenext10yearstoconfirmthepresenceofanEarth-likeplanetwithoxygenandliquidwater,Corotwillletscientistsknowwheretopointtheirlenses. 8.MeasurementsofminutechangesinbrightnesswillenablescientiststodetectgiantJupiter-likegasplanetsaswellassmallrockyones.Itistherockyplanets-thatcouldbenobiggerthanabouttwicethesizeoftheEarth-whichwillcausethemostexcitement.Scientistsexpecttofindbetween10and40ofthesesmallerplanets. 9.Corotwillalsoprobeintostellarinteriorsbystudyingtheacousticwavesthatrippleacrossthesurfaceofstars,atechniquecalled"asteroseismology". 10.Thenatureoftheripplesallowsastronomerstocalculateastar’sprecisemass,ageandchemicalcomposition. 11."Aplanetpassinginfrontofastarcanbedetectedbythefallinlightfromthatstar.Smalloscillationsofthestaralsoproducechangesinthelightemitted,whichrevealwhatthestarismadeofandhowtheyarestructuredinternally.Thisdatawillprovideamajorboosttoourunderstandingofhowstarsformandevolve,"ProfRoxburghsaid. 12.Sincethediscoveryin1995ofthefirst"exoplanet"-aplanetorbitingastarotherthantheSun-morethan200othershavebeenfoundbyground-basedobservatories. 13.Untilnowtheusualmethodoffindingexoplanetshasbeentodetectthe"wobble"theirgravityimpartsonparentstars.ButonlygiantgaseousplanetsbiggerthanJupitercanbefoundthisway,andtheyareunlikelytoharbourlife. 14.Inthe2010s,ESAplanstolaunchDarwin,afleetoffourorfiveinterlinkedspacetelescopesthatwillnotonlyspotsmallrockyplanets,butanalysetheiratmospheresforsignsofbiologicalactivity. 15.Ataroundthesametime,theUSspaceagency,Nasa,willlaunchTerrestrialPlanetFinder,anotherspacetelescopedesignedtolocateEarth-likeplanets. ChoosetheappropriateletterfromA-Dforquestion1. 1.Corotisaninstrumentwhich (A)canhelptosearchforcertainplanets (B)isusedtofindplanetsintheorbit (C)canlocateplanetswithhumanbeings (D)canspotanyplanetswithwater. Dothefollowingstatementsagreewiththeinformationgiveninthereadingpassage?Forquestions2-5write TRUEifthestatementagreeswiththeinformation FALSEifthestatementcontraictstheinformation NOTGIVENifthereisnoinformationonthisinthepassage 2.Scientistsaretryingtofindoutabouttheplanetsthatcanbeinhabited. 3.BBCRadio4recentlyfocusesonthebroadcastingofCorot. 4.Passingobjectsmightcauseafallinlight. 5.CorotcantellwhetherthereisanotherEarth-likeplanet. Basedonyourreadingofthepassage,completethesentencesbelowwithwordstakenfromthepassage.UseNOMORETHANTHREEWORDSforeachanswer. Withmeasurements,scientistswillbeabletosearchforsomegaseousandrockyplanets.Theywillbeextremelyexcitediftheycandiscoversomesmall6.__________,theexpectednumberofwhichcouldbeupto7.__________. Corotwillenablescientiststostudythe8.__________ofstars.Inthisway,astar’smass,ageandchemicalcompositioncanbecalculated. AccordingtoProfRoxburgh,changesinlightcanbecausedbypassingplanetsorstar9.__________.Therelatedstatisticscangainusabetter10.__________ofthestarformationandevolvement. Observatorieshavefoundmanyexoplanets,whichare11.__________otherstarsthantheSun.Thecommonwayusedinfindingexoplanetscanonlydetecthugegasplanets,whichdonot12.___________. WiththelaunchingofDarwin,astronomerswillbeabletoanalysewhetherthoserockyplanetshave13.__________forlife.