首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
The Science of Sport 1 At the 2004 Olympic Games in Athens, the Chinese athlete Liu Xiang equaled t...
查看本题答案
包含此试题的试卷
理工类《单选集填空》真题及答案
点击查看
你可能感兴趣的试题
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
Bettylikesverymuch.Shedrawspictureseveryday.
art
music
sport
science
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
??????????????TheScienceofSport1?Atthe2004OlympicG
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
TheancientGreekswere______formanyadvancesinscience
conscious, together with
content, other than
outspoken, apart from
responsible, along with
??????????????TheScienceofSport1?Atthe2004OlympicG
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
??????????????TheScienceofSport1?Atthe2004OlympicG
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
??????????????TheScienceofSport1?Atthe2004OlympicG
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
Bettylikes______verymuch.Shedrawspictureseveryday.
art
music
sport
science
? ?下面的短文后有2项测试任务1第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳
热门试题
更多
HowtoBeaSuccessfulBusinesspersonHaveyoueverwonderedwhysomepeoplearesuccessfulinbusinessandothersarenotHere’sastoryaboutonesuccessfulbusinessperson.Hestartedoutwashingdishesandtodayheowns168restaurants.ZubairKaziwasborninBhatkalasmalltowninsouthwestIndia.Hisdreamwastobeanairplanepilotandwhenhewas16yearsoldhelearnedtoflyasmallplane.Attheageof23andwithjustalittlemoneyinhispocketMr.KazimovedtotheUnitedStates.HehopedtogetajobintheairplaneindustryinCalifornia.Insteadheendedupworkingforacompanythatrentedcars.WhileMr.Kaziwasworkingatthecarrental租赁的companyhefrequentlyateatanearbyKFCrestaurant.TosavemoneyonfoodhedecidedtogetajobwithKFC.Fortwomonthsheworkedascook’sassistant.Hisjobwastocleanthekitchenandhelpthecook.Ididn’tlikeitMr.KazisaysbutIalwaysdidthebestIcould.OnedayMr.Kazi’stwoco-workersfailedtocometowork.ThatdayMr.Kazididtheworkofallthreepeopleinthekitchen.Thisreallyimpressedtheownersoftherestaurant.Afewmonthslatertheownersneededamanagerforanewrestaurant.TheygavethejobtoMr.Kazi.Heworkedhardasthemanagerandsoontherestaurantwasmakingaprofit.AfewyearslaterMr.Kaziheardaboutarestaurantthatwaslosingmoney.Therestaurantwasdirtyinsideandthefoodwasterrible.Mr.Kaziborrowedmoneyfromabankandboughttherestaurant.ForthefirstsixmonthsMr.Kaziworkedintherestaurantfrom8a.m.to10p.m.sevendaysaweek.Heandhiswifecleaneduptherestaurantremodeledthefrontofthebuildingandimprovedthecooking.Theyalsotriedhardtopleasethecustomers.IfsomeonehadtowaitmorethantenminutesfortheirfoodMrs.Kazigavethemafreesoda.Beforelongtherestaurantwasmakingaprofit.AyearlaterMr.Kazisoldhisrestaurantforaprofit.Withthemoneyheearnedheboughtthreemorerestaurantsthatwerelosingmoney.Againhecleanedthemupimprovedthefoodandretrainedtheemployees.Beforelongtheserestaurantsweremakingaprofittoo.TodayMr.Kaziowns168restaurantsbutheisn’tplanningtostopthere.He’slookingformorepoorlymanagedrestaurantstobuy.IloveitwhenIgotobuyarestaurantandfindit’samessMr.Kazisays.Theonlywayitcangoisup./Mr.KazidecidedtoworkwithKFCto
Iwon’t{{U}}tolerate{{/U}}thatkindofbehavior.
WeavingwithLightIntheSierraMadremountainrangeofwestcentralMexicothenativeHuicholpeoplelivemuchthewaytheirancestorsdid--Withoutelectricity.That’sbecauseit’stooexpensivetostringpowerlinestotheremotemountainareaswheretheylive.TohelpsupportthemselvestheHuicholcreatebeautifulartwork.Theyselltheirartincitieshundredsofmilesawayfromtheirvillages.Andwithoutelectricity--athomeorontheroadtheycanonlyworkduringdaylighthours.Whenitgetsdarktheymuststopwhateverthey’redoing.NowateamofscientistsdesignersandarchitectsisusingnewtechnologiestoprovidetheHuicholwithlightafterthesunsets.Thescientists’techniqueinvolvesweavingtinyelectroniccrystalsintofabricsthatcanbemadeintoclothesbagsorotheritems.Bycollectingthesun’senergyduringthedaytheselightweightfabricsprovidebrightwhitelightatnight.TheirinventorshavenamedthefabricsPortable轻便的Lights.PortableLightshavethepotentialtotransformthelivesofpeoplewithoutelectricityaroundtheworld.AtthecoreofPortableLightstechnologyaredevicescalledhigh-brightnesslight-emittingdiodes高亮度发光二极管orHBLEDs.Thesetinylightsappearindigitalclockstelevisionsandstreetlights.LEDsarecompletelydifferentfromthelightbulbs灯泡.Mostofthoseglassbulbsbelongtoatypecalledincandescentlights白炽灯.Insideelectricityheatsametalcoil线圈toabout2200degreesCelsius.Atthattemperaturebulbsgiveofflightwecansee.Ninetypercentofenergyproducedbyincandescentlightshoweverisheat--andinvisible.Withallthatwastedenergybulbsburnoutquickly.Theyarealsoeasilybroken.LEDsontheotherhandareliketinypiecesofrockmadeupofmolecules分子thatarearrangedinacrystalstructure.WhenanelectriccurrentpassesthroughanLEDthecrystalstructureproduceslight.Unlikeincandescentbulbstheycanproducelightofvariouscolors.WithinanLEDthetypeofmoleculesandtheirparticulararrangementdetermineswhatcolorisproduced.TomakealivingtheHuicholcreateartworkand
Thenewswill{{U}}horrify{{/U}}everyone.
Theweatherisaconstant{{U}}subject{{/U}}ofconversationinBritain.
第二篇TheBookofLifeSofarscientistshavenamedabout1.8millionlivingspecies物种andthat’sjustasmallpartofwhatprobablyexistsonEarth.Withsomanyplantsanimalsandothercreaturescoveringtheplanetitcanbetoughtofigureoutwhattypeofspiderismovingupyourlegorwhatkindofbirdisflyingby.Asoon-to-be-launchedWebsitemighthelp.AninternationalteamofresearchershasannouncedthecreationofaWeb-basedEncyclopedia百科全书ofLifeEoL.TheprojectaimstocatalogeveryspeciesonEarthinasingleeasy-to-usereferenceguide.Togettheencyclopediastartedthecreatorswilluseinformationfromscientificdatabases数据库thatalreadyexist.Andeventuallyinspecialsectionsofthesitenon-scientistswithspecialized专门的knowledgewillgettojoinin.Bird-watchersforexamplewillbeabletoinputwhichbirdsthey’veseenandwhere.Thetechnologyforthiskindoftoolhasonlyrecentlybecomeavailable.AstheEoLdevelopsyoumightfinditusefulforschoolprojects.Thesitewillfeaturespecialpagesforkidswhoarestudyingecosystems生态系统intheirneighborhoods.Tomakesuretheencyclopediaisaccuratescientistswillreviewmuchoftheinformationaddedtoit.Peoplewhovisitthesitewillbeabletochoosetoleaveoutpagesthathaven’tbeenreviewed.AnotherconvenientfeatureoftheEoListhatyou’llbeabletopickthelevelofdetailyouseetomatchyourinterestsageandcurrentknowledge.Ifyouwantedtolearnaboutbearsforascienceclassreportforexampleyoucouldusethenovicesettingtogetbasicinformationabouttheanimals.Ontheexpertsettingontheotherhandyoucouldgetmuchmoredetailedinformationaboutthehistoryliteratureandexplorationofbears.Itnowtakesyearsforscientiststocollectallthedatatheyneedtodescribeandanalyzespecies.ThecreatorsoftheEncyclopediaofLifehopethattheirnewtoolwillspeedthatprocess.Spiderandbirdmentionedinparagraph1areexamplestoillustrate
Wehaveneverseensuch{{U}}gorgeous{{/U}}hills.
Itis{{U}}virtually{{/U}}impossibletopersuadehimtoapplyforthejob.
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
第二篇TheBookofLifeSofarscientistshavenamedabout1.8millionlivingspecies物种andthat’sjustasmallpartofwhatprobablyexistsonEarth.Withsomanyplantsanimalsandothercreaturescoveringtheplanetitcanbetoughtofigureoutwhattypeofspiderismovingupyourlegorwhatkindofbirdisflyingby.Asoon-to-be-launchedWebsitemighthelp.AninternationalteamofresearchershasannouncedthecreationofaWeb-basedEncyclopedia百科全书ofLifeEoL.TheprojectaimstocatalogeveryspeciesonEarthinasingleeasy-to-usereferenceguide.Togettheencyclopediastartedthecreatorswilluseinformationfromscientificdatabases数据库thatalreadyexist.Andeventuallyinspecialsectionsofthesitenon-scientistswithspecialized专门的knowledgewillgettojoinin.Bird-watchersforexamplewillbeabletoinputwhichbirdsthey’veseenandwhere.Thetechnologyforthiskindoftoolhasonlyrecentlybecomeavailable.AstheEoLdevelopsyoumightfinditusefulforschoolprojects.Thesitewillfeaturespecialpagesforkidswhoarestudyingecosystems生态系统intheirneighborhoods.Tomakesuretheencyclopediaisaccuratescientistswillreviewmuchoftheinformationaddedtoit.Peoplewhovisitthesitewillbeabletochoosetoleaveoutpagesthathaven’tbeenreviewed.AnotherconvenientfeatureoftheEoListhatyou’llbeabletopickthelevelofdetailyouseetomatchyourinterestsageandcurrentknowledge.Ifyouwantedtolearnaboutbearsforascienceclassreportforexampleyoucouldusethenovicesettingtogetbasicinformationabouttheanimals.Ontheexpertsettingontheotherhandyoucouldgetmuchmoredetailedinformationaboutthehistoryliteratureandexplorationofbears.Itnowtakesyearsforscientiststocollectallthedatatheyneedtodescribeandanalyzespecies.ThecreatorsoftheEncyclopediaofLifehopethattheirnewtoolwillspeedthatprocess.WhichofthefollowingstatementsisNOTtrue
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
SomeUnusualCelebrationsSomeholidaysarewell-knownallaroundtheworld.AmongthemareNewYear’sEvecelebrations.AlsocommonaredaysinhonorofloveandfriendshiplikeValentine’sDay.EachcountryhasitsownspecialholidaystoooftentomarkimportanteventsinItshistory.Schoolsbanksandgovernmentofficesallcloseondayslikethese.______46Afewofthemarereallyverystrange.Ofcoursetheyarenotstrangetothepeoplewhocelebratethem.Perhapsthatisbecausethecelebrationshavelongtraditions.ConsiderAprilFool’sDayforexample.Nooneknowswhenorwhyitbegan.Todayitiscelebratedinmanycountries--FranceEnglandandAustraliaamongothers.Onthisdaypeopleplaypracticaljokes.______47Theoneswholaugharetheonesplayingthejokes.Thepeopletheyfooloftengetangry.DoescelebratingthisdaymakesensetoyouDyngusDayinPolandseemsstrangetoo.Onthisdayitistraditionalforboystopourwaterovertheheadsofgirls.Hereisthestrangestpart:Theydoittogirlstheylike.Otherunusualcelebrationstakeplaceinasinglecityortown.AholidaycalledLaTomatinaiscelebratedinBunolSpain.EveryyearinlateAugustbigtruckscarrymorethan200000poundsoftomatoesintothislittletown.______48Fortwohourspeopleinthestreetsthrowtomatoesateachother.Everyoneendsupredfromheadtotoe.August10marksthestartofthePuckFairanIrishfestivalwithaveryunusualtraditionPeoplefromthetownofKillorglingoupintothemountainsandcatchawildgoat.______49Therearealsosomecelebrationsthatarereallystrange.IntheUnitedStatessometimesonepersongetsanideaforanewholidayandtriestogetotherstoacceptit.WhoseideawasPublicSleepingDayThatoneisonFebruary28.ItmayseemstrangebutitsoundslikemorefunthantheoneonFebruary9.______50DoyouliketheideaofinventinganewholidayIfyoudothenyouwillwanttomarkMarch26onyourcalendar.ThatisMakeUpYourOwnHolidayDay.A.Someofthedayspeoplecelebratehoweverarelessserious.B.Jokesaresupposedtobefunnybutthesejokesdonotmakeeveryonelaugh.C.Somepeoplehavefunimaginingnewholidays.D.Theybringhimbacktotownputacrownonhisheadandmakehimkingforthreedays.E.Thenbeginstheworld’sbiggestfoodfight.F.ThatissupposedtobeToothacheDay.
第一篇RenewableEnergySources Todaypetroleum石油providesaround40%oftheworld’senergyneedsmostlyfuellingautomobiles.Coalisstillusedmostlyinpowerstationstocoverone-quarterofourenergyneedsbutitistheleastefficientunhealthiestandmostenvironmentallydamagingfossilfuel矿物燃料.Naturalgasreservescouldfillsomeofthegapfromoilbutreservesofthatwillnotlastintothe22ndcenturyeither.Mostexpertspredictwewillexhausteasilyaccessiblereserveswithin50years.Less-pollutingrenewableenergysourcesofferamorepracticallong-termenergysolution.Renewablereferstothefactthattheseresourcesarenotusedfasterthantheycanbereplaced. Hydroelectric水力发电的powerisnowthemostcommonformofrenewableenergysupplyingaround20%ofworldelectricity.China’sThreeGorgesDamisthelargestever.AtfivetimesthesizeoftheUS’sHooverDamits26turbines涡轮机willgeneratetheequivalentenergyof18coal-firedpowerstations.Itwillsatisfy3%ofChina’sentireelectricitydemand. In2003thefirstcommercialpowerstationtousetidal潮汐的currentsintheopenseaopenedinNorway.Itisdesignedlikewindmill风车butotherstaketheformofturbines. Aspricesfallwindpowerhasbecomethefastestgrowingtypeofelectricitygeneration-quadrupling翻两番worldwidebetween1999and2005.Modernwindfarmsconsistofturbinesthatgenerateelectricity.Thoughitwillbemoreexpensivethereismorethanenoughwindtoprovidetheworld’sentireenergyneeds.Windfarmscomeinonshoreandoffshoreforms.Theycanoftenendupatspotsofnaturalbeautyandareoftenunpopularwithresidents.Andturbinesarenottotallyharmless-theycaninterferewithradaralterclimateandkillseabirds.ScotlandisbuildingEurope’slargestwindfarmwhichwillpower200000homes.TheUK’sgoalistogenerateone-fifthofpowerfromrenewablesourcesmainlywindby2020.Butthismaycauseproblemsbecausewindisunreliable. Accordingtothepassagewhichofthefollowingisthemostpollutingenergyresource?
HowtoBeaSuccessfulBusinesspersonHaveyoueverwonderedwhysomepeoplearesuccessfulinbusinessandothersarenotHere’sastoryaboutonesuccessfulbusinessperson.Hestartedoutwashingdishesandtodayheowns168restaurants.ZubairKaziwasborninBhatkalasmalltowninsouthwestIndia.Hisdreamwastobeanairplanepilotandwhenhewas16yearsoldhelearnedtoflyasmallplane.Attheageof23andwithjustalittlemoneyinhispocketMr.KazimovedtotheUnitedStates.HehopedtogetajobintheairplaneindustryinCalifornia.Insteadheendedupworkingforacompanythatrentedcars.WhileMr.Kaziwasworkingatthecarrental租赁的companyhefrequentlyateatanearbyKFCrestaurant.TosavemoneyonfoodhedecidedtogetajobwithKFC.Fortwomonthsheworkedascook’sassistant.Hisjobwastocleanthekitchenandhelpthecook.Ididn’tlikeitMr.KazisaysbutIalwaysdidthebestIcould.OnedayMr.Kazi’stwoco-workersfailedtocometowork.ThatdayMr.Kazididtheworkofallthreepeopleinthekitchen.Thisreallyimpressedtheownersoftherestaurant.Afewmonthslatertheownersneededamanagerforanewrestaurant.TheygavethejobtoMr.Kazi.Heworkedhardasthemanagerandsoontherestaurantwasmakingaprofit.AfewyearslaterMr.Kaziheardaboutarestaurantthatwaslosingmoney.Therestaurantwasdirtyinsideandthefoodwasterrible.Mr.Kaziborrowedmoneyfromabankandboughttherestaurant.ForthefirstsixmonthsMr.Kaziworkedintherestaurantfrom8a.m.to10p.m.sevendaysaweek.Heandhiswifecleaneduptherestaurantremodeledthefrontofthebuildingandimprovedthecooking.Theyalsotriedhardtopleasethecustomers.IfsomeonehadtowaitmorethantenminutesfortheirfoodMrs.Kazigavethemafreesoda.Beforelongtherestaurantwasmakingaprofit.AyearlaterMr.Kazisoldhisrestaurantforaprofit.Withthemoneyheearnedheboughtthreemorerestaurantsthatwerelosingmoney.Againhecleanedthemupimprovedthefoodandretrainedtheemployees.Beforelongtheserestaurantsweremakingaprofittoo.TodayMr.Kaziowns168restaurantsbutheisn’tplanningtostopthere.He’slookingformorepoorlymanagedrestaurantstobuy.IloveitwhenIgotobuyarestaurantandfindit’samessMr.Kazisays.Theonlywayitcangoisup./Tosaveafailingrestaurant.Mr.KazididallthefollowingthingsEXCEPTto
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
Hersister{{U}}urged{{/U}}hertoapplyforthejob.
SomeUnusualCelebrationsSomeholidaysarewell-knownallaroundtheworld.AmongthemareNewYear’sEvecelebrations.AlsocommonaredaysinhonorofloveandfriendshiplikeValentine’sDay.EachcountryhasitsownspecialholidaystoooftentomarkimportanteventsinItshistory.Schoolsbanksandgovernmentofficesallcloseondayslikethese.______46Afewofthemarereallyverystrange.Ofcoursetheyarenotstrangetothepeoplewhocelebratethem.Perhapsthatisbecausethecelebrationshavelongtraditions.ConsiderAprilFool’sDayforexample.Nooneknowswhenorwhyitbegan.Todayitiscelebratedinmanycountries--FranceEnglandandAustraliaamongothers.Onthisdaypeopleplaypracticaljokes.______47Theoneswholaugharetheonesplayingthejokes.Thepeopletheyfooloftengetangry.DoescelebratingthisdaymakesensetoyouDyngusDayinPolandseemsstrangetoo.Onthisdayitistraditionalforboystopourwaterovertheheadsofgirls.Hereisthestrangestpart:Theydoittogirlstheylike.Otherunusualcelebrationstakeplaceinasinglecityortown.AholidaycalledLaTomatinaiscelebratedinBunolSpain.EveryyearinlateAugustbigtruckscarrymorethan200000poundsoftomatoesintothislittletown.______48Fortwohourspeopleinthestreetsthrowtomatoesateachother.Everyoneendsupredfromheadtotoe.August10marksthestartofthePuckFairanIrishfestivalwithaveryunusualtraditionPeoplefromthetownofKillorglingoupintothemountainsandcatchawildgoat.______49Therearealsosomecelebrationsthatarereallystrange.IntheUnitedStatessometimesonepersongetsanideaforanewholidayandtriestogetotherstoacceptit.WhoseideawasPublicSleepingDayThatoneisonFebruary28.ItmayseemstrangebutitsoundslikemorefunthantheoneonFebruary9.______50DoyouliketheideaofinventinganewholidayIfyoudothenyouwillwanttomarkMarch26onyourcalendar.ThatisMakeUpYourOwnHolidayDay.A.Someofthedayspeoplecelebratehoweverarelessserious.B.Jokesaresupposedtobefunnybutthesejokesdonotmakeeveryonelaugh.C.Somepeoplehavefunimaginingnewholidays.D.Theybringhimbacktotownputacrownonhisheadandmakehimkingforthreedays.E.Thenbeginstheworld’sbiggestfoodfight.F.ThatissupposedtobeToothacheDay.
BlackHoles Mostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.Ablackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity. Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons. ●Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope. ●Inastronomicaltermsblackholesaretruly.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross. ●ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance. In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse. Blackholesexistbutaredifficulttoobserve.
WeavingwithLightIntheSierraMadremountainrangeofwestcentralMexicothenativeHuicholpeoplelivemuchthewaytheirancestorsdid--Withoutelectricity.That’sbecauseit’stooexpensivetostringpowerlinestotheremotemountainareaswheretheylive.TohelpsupportthemselvestheHuicholcreatebeautifulartwork.Theyselltheirartincitieshundredsofmilesawayfromtheirvillages.Andwithoutelectricity--athomeorontheroadtheycanonlyworkduringdaylighthours.Whenitgetsdarktheymuststopwhateverthey’redoing.NowateamofscientistsdesignersandarchitectsisusingnewtechnologiestoprovidetheHuicholwithlightafterthesunsets.Thescientists’techniqueinvolvesweavingtinyelectroniccrystalsintofabricsthatcanbemadeintoclothesbagsorotheritems.Bycollectingthesun’senergyduringthedaytheselightweightfabricsprovidebrightwhitelightatnight.TheirinventorshavenamedthefabricsPortable轻便的Lights.PortableLightshavethepotentialtotransformthelivesofpeoplewithoutelectricityaroundtheworld.AtthecoreofPortableLightstechnologyaredevicescalledhigh-brightnesslight-emittingdiodes高亮度发光二极管orHBLEDs.Thesetinylightsappearindigitalclockstelevisionsandstreetlights.LEDsarecompletelydifferentfromthelightbulbs灯泡.Mostofthoseglassbulbsbelongtoatypecalledincandescentlights白炽灯.Insideelectricityheatsametalcoil线圈toabout2200degreesCelsius.Atthattemperaturebulbsgiveofflightwecansee.Ninetypercentofenergyproducedbyincandescentlightshoweverisheat--andinvisible.Withallthatwastedenergybulbsburnoutquickly.Theyarealsoeasilybroken.LEDsontheotherhandareliketinypiecesofrockmadeupofmolecules分子thatarearrangedinacrystalstructure.WhenanelectriccurrentpassesthroughanLEDthecrystalstructureproduceslight.Unlikeincandescentbulbstheycanproducelightofvariouscolors.WithinanLEDthetypeofmoleculesandtheirparticulararrangementdetermineswhatcolorisproduced.AllofthefollowingaredisadvantagesofincandescentlightsEXCEPTthat
Ihavebeentryingto{{U}}quit{{/U}}smoking.
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
BlackHoles Mostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.Ablackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity. Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons. ●Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope. ●Inastronomicaltermsblackholesaretruly.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross. ●ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance. In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse. Thenearestblackholesarehundredsoflightyearsawayfromus.
SomeUnusualCelebrationsSomeholidaysarewell-knownallaroundtheworld.AmongthemareNewYear’sEvecelebrations.AlsocommonaredaysinhonorofloveandfriendshiplikeValentine’sDay.EachcountryhasitsownspecialholidaystoooftentomarkimportanteventsinItshistory.Schoolsbanksandgovernmentofficesallcloseondayslikethese.______46Afewofthemarereallyverystrange.Ofcoursetheyarenotstrangetothepeoplewhocelebratethem.Perhapsthatisbecausethecelebrationshavelongtraditions.ConsiderAprilFool’sDayforexample.Nooneknowswhenorwhyitbegan.Todayitiscelebratedinmanycountries--FranceEnglandandAustraliaamongothers.Onthisdaypeopleplaypracticaljokes.______47Theoneswholaugharetheonesplayingthejokes.Thepeopletheyfooloftengetangry.DoescelebratingthisdaymakesensetoyouDyngusDayinPolandseemsstrangetoo.Onthisdayitistraditionalforboystopourwaterovertheheadsofgirls.Hereisthestrangestpart:Theydoittogirlstheylike.Otherunusualcelebrationstakeplaceinasinglecityortown.AholidaycalledLaTomatinaiscelebratedinBunolSpain.EveryyearinlateAugustbigtruckscarrymorethan200000poundsoftomatoesintothislittletown.______48Fortwohourspeopleinthestreetsthrowtomatoesateachother.Everyoneendsupredfromheadtotoe.August10marksthestartofthePuckFairanIrishfestivalwithaveryunusualtraditionPeoplefromthetownofKillorglingoupintothemountainsandcatchawildgoat.______49Therearealsosomecelebrationsthatarereallystrange.IntheUnitedStatessometimesonepersongetsanideaforanewholidayandtriestogetotherstoacceptit.WhoseideawasPublicSleepingDayThatoneisonFebruary28.ItmayseemstrangebutitsoundslikemorefunthantheoneonFebruary9.______50DoyouliketheideaofinventinganewholidayIfyoudothenyouwillwanttomarkMarch26onyourcalendar.ThatisMakeUpYourOwnHolidayDay.A.Someofthedayspeoplecelebratehoweverarelessserious.B.Jokesaresupposedtobefunnybutthesejokesdonotmakeeveryonelaugh.C.Somepeoplehavefunimaginingnewholidays.D.Theybringhimbacktotownputacrownonhisheadandmakehimkingforthreedays.E.Thenbeginstheworld’sbiggestfoodfight.F.ThatissupposedtobeToothacheDay.
第二篇TheBookofLifeSofarscientistshavenamedabout1.8millionlivingspecies物种andthat’sjustasmallpartofwhatprobablyexistsonEarth.Withsomanyplantsanimalsandothercreaturescoveringtheplanetitcanbetoughtofigureoutwhattypeofspiderismovingupyourlegorwhatkindofbirdisflyingby.Asoon-to-be-launchedWebsitemighthelp.AninternationalteamofresearchershasannouncedthecreationofaWeb-basedEncyclopedia百科全书ofLifeEoL.TheprojectaimstocatalogeveryspeciesonEarthinasingleeasy-to-usereferenceguide.Togettheencyclopediastartedthecreatorswilluseinformationfromscientificdatabases数据库thatalreadyexist.Andeventuallyinspecialsectionsofthesitenon-scientistswithspecialized专门的knowledgewillgettojoinin.Bird-watchersforexamplewillbeabletoinputwhichbirdsthey’veseenandwhere.Thetechnologyforthiskindoftoolhasonlyrecentlybecomeavailable.AstheEoLdevelopsyoumightfinditusefulforschoolprojects.Thesitewillfeaturespecialpagesforkidswhoarestudyingecosystems生态系统intheirneighborhoods.Tomakesuretheencyclopediaisaccuratescientistswillreviewmuchoftheinformationaddedtoit.Peoplewhovisitthesitewillbeabletochoosetoleaveoutpagesthathaven’tbeenreviewed.AnotherconvenientfeatureoftheEoListhatyou’llbeabletopickthelevelofdetailyouseetomatchyourinterestsageandcurrentknowledge.Ifyouwantedtolearnaboutbearsforascienceclassreportforexampleyoucouldusethenovicesettingtogetbasicinformationabouttheanimals.Ontheexpertsettingontheotherhandyoucouldgetmuchmoredetailedinformationaboutthehistoryliteratureandexplorationofbears.Itnowtakesyearsforscientiststocollectallthedatatheyneedtodescribeandanalyzespecies.ThecreatorsoftheEncyclopediaofLifehopethattheirnewtoolwillspeedthatprocess.AtthestartingstagetheEoLwillgetinformationfrom
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
BlackHoles Mostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.Ablackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity. Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons. ●Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope. ●Inastronomicaltermsblackholesaretruly.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross. ●ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance. In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse. Theattractionoftwolargestarsleadstogravity.
Onlyasmallminorityofthementallyillare{{U}}liable{{/U}}toharmthemselvesorothers.
WhatIstheCoolestGasintheUniverse’.WhatisthecoldestairtemperatureeverrecordedontheEarthWherewasthislowtemperaturerecordedThecoldestrecordedtemperatureonEarthwas--91℃.which51inAntarctica南极洲in1983.Weencounteraninterestingsituationwhenwediscusstemperaturesin52.TemperaturesinEarthorbit轨道actuallyrangefromabout+120℃to--120℃.Thetemperaturedependsupon53youareindirectsunlightorshade.Obviously-120℃iscolderthanourbodycan54endure.Thespacetemperaturesjustdiscussedaffectonlyourareaofthesolar55.ObviouslyitishotterclosertotheSunandcolderaswetravel56fromtheSun.ScientistsestimatetemperaturesatPlutoareabout--210℃.HowcoldisthelowestestimatedtemperatureintheentireuniverseAgainitdependsuponyour57.Wearetaughtitissupposedly58tohaveatemperaturebelowabsolutezerowhichis--273℃atwhichatomsdonotmove.TwoscientistsCornellandWiemanhavesuccessfully59downagastoatemperaturebarelyaboveabsolutezero.TheywonaNobelPrizeinPhysicsin2001fortheirwork--notadiscoveryinthiscase.Whyisthetwoscientists’worksoimportanttoscienceInthe1920sSatyendraNathBosewasstudyinganinteresting60aboutspeciallightparticles微粒wenowcallphotons光子.Bosehadtrouble61otherscientiststobelievehistheorysohecontactedAlbertEinstein.Einstein’scalculationshelpedhimtheorizethatatoms62behaveasBosethought--butonlyatverycoldtemperatures.Scientistshavealsodiscoveredthatultra-cold超冷atomscanhelpthemmaketheworld’satomicclockseven63accurate.Theseclocksaresoaccuratetodaytheywouldonlyloseonesecond64sixmillionyears!Suchaccuracywillhelpustravelinspacebecausedistanceisvelocity速度timestimed=v×tWiththelongdistancesinvolvedinspace65weneedtoknowtimeasaccuratelyaspossibletogetaccuratedistance.
第一篇RenewableEnergySources Todaypetroleum石油providesaround40%oftheworld’senergyneedsmostlyfuellingautomobiles.Coalisstillusedmostlyinpowerstationstocoverone-quarterofourenergyneedsbutitistheleastefficientunhealthiestandmostenvironmentallydamagingfossilfuel矿物燃料.Naturalgasreservescouldfillsomeofthegapfromoilbutreservesofthatwillnotlastintothe22ndcenturyeither.Mostexpertspredictwewillexhausteasilyaccessiblereserveswithin50years.Less-pollutingrenewableenergysourcesofferamorepracticallong-termenergysolution.Renewablereferstothefactthattheseresourcesarenotusedfasterthantheycanbereplaced. Hydroelectric水力发电的powerisnowthemostcommonformofrenewableenergysupplyingaround20%ofworldelectricity.China’sThreeGorgesDamisthelargestever.AtfivetimesthesizeoftheUS’sHooverDamits26turbines涡轮机willgeneratetheequivalentenergyof18coal-firedpowerstations.Itwillsatisfy3%ofChina’sentireelectricitydemand. In2003thefirstcommercialpowerstationtousetidal潮汐的currentsintheopenseaopenedinNorway.Itisdesignedlikewindmill风车butotherstaketheformofturbines. Aspricesfallwindpowerhasbecomethefastestgrowingtypeofelectricitygeneration-quadrupling翻两番worldwidebetween1999and2005.Modernwindfarmsconsistofturbinesthatgenerateelectricity.Thoughitwillbemoreexpensivethereismorethanenoughwindtoprovidetheworld’sentireenergyneeds.Windfarmscomeinonshoreandoffshoreforms.Theycanoftenendupatspotsofnaturalbeautyandareoftenunpopularwithresidents.Andturbinesarenottotallyharmless-theycaninterferewithradaralterclimateandkillseabirds.ScotlandisbuildingEurope’slargestwindfarmwhichwillpower200000homes.TheUK’sgoalistogenerateone-fifthofpowerfromrenewablesourcesmainlywindby2020.Butthismaycauseproblemsbecausewindisunreliable. Whichcountrytooktheleadinmakinguseoftidalcurrentstoproducepowerin2003?
热门题库
更多
英语
语文
中石油职称英语
理工类
卫生类
综合类
国际货运代理师
报关水平测试
报检员
物流员(四级)
助理物流师(三级)
物流师(二级)
高级物流师(一级)
物流案例分析
单证员基础理论与知识
单证员缮制与操作
湘公网安备 43130202000226号