首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
查看本题答案
包含此试题的试卷
理工类《单选题》真题及答案
点击查看
你可能感兴趣的试题
热门试题
更多
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??????????? ??????{{B}}ProblemsofInternet{{/B}}? ?TheproportionofworkscutforthecinemainBritaindroppedfrom40per centwhenIjoinedtheBBFCin1975tolessthan4percentwhenIleft.ButI don’tthinkthat20yearsfromnowitwillbepossibletoregulateanymediumas closelyasIregulatedfilm.??TheInternetisofcoursethe greatestproblemforthiscentury.Theworldwillhavetofindameansthrough somesortofinternationaltreatyofUnitedNationsinitiativetocontrolthe materialthat’snowgoingtotallyunregulatedintopeople’shomes.Thatsaidit willonlytakeonelittlecountrylikeParaguaytorefusetosignatreatyfor transmissiontobeunstoppable.Parentalcontrolisnevergoingtobe sufficient.??I’mstillveryworriedabouttheimpactofviolent videogameseventhoughresearcherssaytheirimpactismoderatedbythefact thatplayersdon’tsomuchexperiencethegameasenjoythetechnicalmanoeuvres 策略thatenableyoutowin.ButinrespectofviolenceinmainstreamfilmsI’m moreoptimistic.Quitesuddenlytasteshavechangedandit’snolonger StalloneorSchwarzeneggerwhoarethetopstarsbutLeonardoDiCaprio—thathas takeneverybodybysurprise.??Gothroughthemostsuccessful filmsinEuropeandAmericanowandyouwillfindvirtuallynonethatweare violent.QuentinTarantinodidn’tusherinanewviolentgenerationandfilms arebecomingmuchmoreprosocialthanonewouldhaveexpected.? ?Cinemagoingwillundoubtedlysurvive.Thenewmultiplexesareaglorious experienceofferingperfectSoundandpictureandverycomfortableseatsthins whichhaddiedoutinthe1980s.Ican’tbelievewe’veachievedthatonlyto throwitawayinfavorofhuddlingarounda14-inchcomputermonitortowatch digitallydeliveredmoviesathome.??Itwillbecomeincreasingly cheaptomakefilmswithcamerasbecomingsmallerandlighterbutremaining veryprecise.Thatmeansgreaterchancesfornewtalenttoemergeasitwillbe mucheasierforpeopletolearnhowtobebetterfilm-makers.People’sworking liveswillbeshorterinthefutureandonceretiredtheywillspendalotof timelearningtodothingsthatamusethem—likemakingvideos.Fiftyyearsonwe couldwellbemedia-saturatedasproducersaswellasaudience;insteadof writinglettersonewillsendlittlehomemoviesentitledMy Week.Whatdoesmedia-saturatedinFiftyyearsonwecouldwellbemedia-saturatedasPara.6mean?_____
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ??????????? ?????{{B}}ANewFinding{{/B}}??British cancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfection andclustersofcasesaroundindustrialsitesaretheresultofpopulation mixingthatincreasesexposure.TheresearchpublishedintheBritishJournalof Cancerbacksupa1988theorythatsomeasyetunidentifiedinfectioncaused leukaemia—nottheenvironmentalfactorswidelyblamedforthedisease.? ?Childhoodleukaemiaappearstobeanunusualresultofacommon infectionsaidSirRichardDollaninternationally—knowncancerexpertwho firstlinkedtobaccowithlungcancerin1950.Avirusisthemostlikely explanation.Youwouldgetanincreasedriskofitifyousuddenlyputalotof peoplefromlargetownsinaruralareawhereyoumighthavepeoplewhohadnot beenexposedtotheinfection.Dollwascommentingonthenewfindingsby researchersatNewcastleUniversitywhichfocusedonaclusterofleukaemia casesaroundtheSellafieldnuclearreprocessingplantinCumbriainnorthern England.Scientistshavebeentryingtoestablishwhytherewasmoreleukaemia inchildrenaroundtheSellafieldareabuthavefailedtoestablishalinkwith radiationorpollution.TheNewcastleUniversityresearchbyHeatherDickinson andLouiseParkershowedtheclusterofcasescouldhavebeenpredictedbecause oftheamountofpopulationmixinggoingonintheareaaslargenumbersof constructionworkersandnuclearstaffmovedintoaruralsetting.Ourstudy showsthatpopulationmixingcanaccountfortheSellafieldleukaemiacluster andthatallchildrenwhethertheirparentsareincomersorlocalsareata higherriskiftheyareborninanareaofhighpopulationmixingDickinson saidinastatementissuedbytheCancerResearchCampaignwhichpublishesthe BritishJournalofCancer.??Theirpaperaddscrucialweightto the1988theoryputforwardbyLeoKinlenacancerepidemiologistatOxford Universitywhosaidthatexposuretoacommonunidentifiedinfectionthrough populationmixingresultedinthedisease.Whofirsthintedatthepossiblecauseofchildhoodleukaemiabyinfection?______
Theoldconcernsloseimportanceandsomeofthem{{U}}vanish{{/U}}altogether.
Sandre{{U}}cameacross{{/U}}animportantletteryesterdaywhilecleaningthedesk.
Ifyouhaveany{{U}}complaint{{/U}}pleaseseethemanager.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
In1861itseemed{{U}}inevitable{{/U}}thattheSouthernstateswouldbreakawayfromtheUnion.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
Peteris{{U}}experiencing{{/U}}adifficultperiodinhislife.
Icanhardlybelieveitit’s{{U}}amazing{{/U}}.
{{*HTML*}}阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ??????????? ????{{B}}ConservationorWastedEffort?{{/B}}? ?Theblackrobin旅鸫isoneoftheworld’srarestbirds.Itisasmall wildbirdanditlivesonlyontheislandofLittleMangereoffthecoastof NewZealand.In1967therewereaboutfiftyblackrobinsthere;in1977there werefewerthanten.{{U}}?46?{{/U}}??Energeticsteps arebeingtakentopreservetheblackrobin.{{U}}?47?{{/U}}Theideais tobuyanotherislandnearbyasaspecialhomeareserveforthreatenedwild lifeincludingblackrobins.TheorganizerssaythatLittleMangereshouldthen berestocked重新准备withtherobin’sfood.Thousandsoftherequiredplantsare atpresentbeingcultivatedinNewZealand.??Isallthisconcern awasteofhumaneffort?{{U}}?48?{{/U}}Arewelosingoursenseofwhat isreasonableandwhatisunreasonable???Intheearth’slong longpasthundredsofkindsofcreatureshaveevolvedrisentoadegreeof successanddiedout.Inthelonglongfuturetherewillbemanynewand differentformsoflife.Thosecreaturesthatadaptthemselvessuccessfullyto whattheearthofferswillsurviveforalongtime.{{U}}?49?{{/U}}This isnature’sprovenmethodofoperation.??Theruleof selection—thesurvivalofthefittest—istheonebywhichhumanbeingshave themselvesarrivedonthescene.Webeingoneofthemostadaptablecreatures theearthhasyetproducedmaylastlongerthanmost{{U}}?50 ?{{/U}}Youmaytakeitasanotherrulethatwhenatlasthumanbeingsshow signsofdyingoutnoothercreaturewillextendapaw爪topostponeour departure.Onthecontrarywewillbehurriedout.??Lifeseems tohavegrowntootoughforblackrobins.Ileaveyoutojudgewhetherweshould trytodoanythingaboutit.??A.Somecreaturescertainsmall animalsinsectsandbirdswillalmostcertainlyoutlast比长久manforthey seemevenmoreadaptable.??B.Thosethatfailtomeetthe challengeswilldisappearearly.??C.Detailedstudiesaregoing onandapublicappealformoneyhasbeenmade.??D.Both representordersintheclassificationoflife.??E.Isitany businessofourswhethertheblackrobinsurvivesordiesout?? ?F.Thesearetheonlyblackrobinsleftintheworld.
Sulphurhas{{U}}occasionally{{/U}}beenfoundintheearthinanalmostpurestate.
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ??????????? ???{{B}}MobilePhoneandDiseases{{/B}}??Astudyby scientistsinFinlandhasfoundthatmobilephoneradiationcancausechangesin humancellsthatmightaffectthebraintheleaderoftheresearchteam said??ButDariusLeszczynskiwhoheadedthe2-yearstudyand willpresentfindingsnextweekataconferenceinQuebec魁北克saidmore researchwasneededtodeterminetheseriousnessofthechangesandtheirimpact onthebrainorthebody.??ThestudyatFinland’sRadiationand NuclearSafetyAuthorityfoundthatexposuretoradiationfrommobilephonescan causeincreasedactivityinhundredsofproteinsinhumancellsgrownina laboratoryhesaid.??Weknowthatthereissomebiological response.Wecandetectitwithourverysensitiveapproachesbutwedonot knowwhetheritcanhaveanyphysiologicaleffectsonthehumanbrainorhuman bodyLeszczynskisaid.??Nonethelessthestudytheinitial findingsofwhichwerepublishedlastmonthinthescientificjournal Differentiationraisesnewquestionsaboutwhethermobilephoneradiationcan weakenthebrain’sprotectiveshieldagainstharmfulsubstances.? ?Thestudyfocusedonchangesincellsthatlinebloodvesselsandon whethersuchchangescouldweakenthefunctioningoftheblood-brainbarrier whichpreventspotentiallyharmfulsubstancesfromenteringthebrainfromthe bloodstreamLeszczynskisaid.??Thestudyfoundthataprotein calledhsp27linkedtothefunctioningoftheblood-brainbarriershowed increasedactivityduetoirradiationandpointedtoapossibilitythatsuch activitycouldmaketheshieldmorepermeable能透过的hesaid.? ?Increasedproteinactivitymightcausecellstoshrink—nottheblood vesselsbutthecellsthemselves—andthentinygapscouldappearbetweenthose cellsthroughwhichsomemoleculescouldpass.hesaid.? ?Leszczynskideclinedtospeculateonwhatkindofhealthrisksthatcould posebutsaidaFrenchstudyindicatedthatheadachefatigueandsleep disorderscouldresult.??Thesearenotlife-threateningproblems butcancausealotofdiscomforthesaidaddingthataSwedishgrouphad alsosuggestedapossiblelinkwithAlzheimer’sdisease.??Where thetruthisdonotknowhesaid.??Leszczynskisaidthathe hiswifeandchildrenusemobilephonesandhesaidthathedidnotthinkhis studysuggestedanyneedfornewrestrictionsonmobilephone use.What’stheresultoftheFrenchstudy?______
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ??????????? ?????{{B}}ANewFinding{{/B}}??British cancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfection andclustersofcasesaroundindustrialsitesaretheresultofpopulation mixingthatincreasesexposure.TheresearchpublishedintheBritishJournalof Cancerbacksupa1988theorythatsomeasyetunidentifiedinfectioncaused leukaemia—nottheenvironmentalfactorswidelyblamedforthedisease.? ?Childhoodleukaemiaappearstobeanunusualresultofacommon infectionsaidSirRichardDollaninternationally—knowncancerexpertwho firstlinkedtobaccowithlungcancerin1950.Avirusisthemostlikely explanation.Youwouldgetanincreasedriskofitifyousuddenlyputalotof peoplefromlargetownsinaruralareawhereyoumighthavepeoplewhohadnot beenexposedtotheinfection.Dollwascommentingonthenewfindingsby researchersatNewcastleUniversitywhichfocusedonaclusterofleukaemia casesaroundtheSellafieldnuclearreprocessingplantinCumbriainnorthern England.Scientistshavebeentryingtoestablishwhytherewasmoreleukaemia inchildrenaroundtheSellafieldareabuthavefailedtoestablishalinkwith radiationorpollution.TheNewcastleUniversityresearchbyHeatherDickinson andLouiseParkershowedtheclusterofcasescouldhavebeenpredictedbecause oftheamountofpopulationmixinggoingonintheareaaslargenumbersof constructionworkersandnuclearstaffmovedintoaruralsetting.Ourstudy showsthatpopulationmixingcanaccountfortheSellafieldleukaemiacluster andthatallchildrenwhethertheirparentsareincomersorlocalsareata higherriskiftheyareborninanareaofhighpopulationmixingDickinson saidinastatementissuedbytheCancerResearchCampaignwhichpublishesthe BritishJournalofCancer.??Theirpaperaddscrucialweightto the1988theoryputforwardbyLeoKinlenacancerepidemiologistatOxford Universitywhosaidthatexposuretoacommonunidentifiedinfectionthrough populationmixingresultedinthedisease.Accordingtothepassagewhichofthefollowingistrue?______
{{*HTML*}}??阅读下面这篇短文短文后列出7个句子请根据短文的内容对每个句子做出判断 {{B}}??????? ??????????? ?????ChangesinMuseums{{/B}}??Museums havechanged.Theyarenolongerplacesthatoneshouldvisittheyareplaces toenjoyandlearn.??AtasciencemuseuminOntarioCanadayou canfeelyourhairstandonendasharmlesselectricitypassesthroughyour body.AttheMetropolitan大城市的MuseumofArtinNewYorkCityyoucanlookat theseventeenthcenturyinstrumentswhilelisteningtotheirmusic.AtNew York’sAmericanMuseumofNaturalHistoryrecentlyyoucanhelpmakeabone-by bonereproductionofthemuseum’sdinosaur恐龙abeastthatlived200million yearsago.??Moreandmoremuseumdirectorsarerealizingthat peoplelearnbestwhentheycansomehowbecomepartofwhattheyareseeing.In manysciencemuseumsforexampletherearenoguidedtours.Thevisitoris encouragedtotouchlistenoperateandexperimentsoastodiscover scientificprinciplesforhimself.Thepurposeisnotonlytoprovidefunbut alsotohelppeoplefeelathomeintheworldofscience.Thetheoryisthat peoplewhodonotunderstandsciencewillprobablyfearitandthosewhofear sciencewillnotuseittobestadvantage.??Onecauseofall thesechangesistheincreaseinwealthandleisuretime.Anothercauseisthe risingpercentageofyoungpeopleinthepopulation.Manyoftheseyoungpeople arecollegestudentsorcollegegraduates.LeonF.Twiggsayoungblack professorofartoncesaidTheyseethingsinanewanddifferentway.They arenotsatisfiedtostandandlookatworksofart;theywantarttheycan participate参加in.Thesameistrueofscienceand history.Whenvisitingmuseumsnowadayspeoplecantakepartinmanyactivities.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}阅读下面这篇短文短文后有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个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ?????????? ??????????? ?????????? ?{{B}}Alaska{{/B}}1.In1868AmericanswelcomedAlaskaintotheUnionas the49thstatesymbolizingachangeofattitudefromthatheldin1867when thepeninsulawaspurchasedfromRussia.ThenmostAmericanshadlittle interestin1500000squarekilometersoficebergsandpolarbears—beyond Canada’swesternbordersfarfromthesettledareasoftheUnitedStates.2. InthosesectionsofthestatewhichlieabovetheArcticCircleAlaskastill isalandoficebergsandpolarbears.Icemasseslieburiedintheearthwhich ispermanentlyfrozentoadepthof90ormoremeters.FromearlyMayuntil earlyAugustthemidnightsunneversetsonthisflattreelessregionbutthe suncannotmelttheicysoilmorethantwo-thirdsofameterdown.3.Alaska isAmerica’slargeststatebutonlyabout325000peoplelivethere.According toestimates800000hectaresofitslandareaarefitforplowingbutonly about640000hectaresarebeingcultivated.4.ArcticAlaskahasbeenthe homeofEskimosforcountlesscenturies.ItisbelievedthattheEskimosmoved therefromMongoliaorSiberiaprobablycrossingBeringStraitnamedforVitus BeringtheDanishseacaptainwhodiscoveredAlaskaonhisvoyageforRussiain 1741.TheEskimosarethestate’searliestknowninhabitants.Russianfur tradersestablishedsettlementsbutbythetimeAlaskawassoldtotheUnited Statesmostofthetradershaddeparted.5.In1896goldwasdiscoverednear theKlondikeRiverinCanadajustacrosstheAlaskanborder.Thousandsof AmericansrushedtotheregionontheirwaytoKlondike;someneverreturned. Alaskawasnevercompletelycutoffagainalthougheventodaytransportationis amajorproblem.ThereareonlytwomotorroutesfromtheU.S.mainlandand withinthestateeverytownhasitsownairfield.Planesflypassengersmail andfreighttothemostdistantvillages.6.Thegoldthatchangedlifeso suddenlyforAlaskawassoonendedandalthoughmanystoriesaboutminingcamps havebecomepartofAmericanliteraturethegoldfromAlaskanearthcontributed lesstoeconomicprogressthanthefishfromAlaskanwaters.Thefishcaughtin asingleyearrangeinvaluefrom$80millionto$90million.Fur-bearing animalsareplentifulintheforestsandstreamsandvaluablefursealsinhabit thewaters.Afterfishingthestate’schiefindustryislumberandthe productionofwoodpulp.InrecentyearsAlaska’ssinglemostimportant resourcehasbecomeoil.Thestatealsohaslargedepositsofcoalcoppergold andotherminerals.Paragraph5______
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??????????? ??????{{B}}ProblemsofInternet{{/B}}? ?TheproportionofworkscutforthecinemainBritaindroppedfrom40per centwhenIjoinedtheBBFCin1975tolessthan4percentwhenIleft.ButI don’tthinkthat20yearsfromnowitwillbepossibletoregulateanymediumas closelyasIregulatedfilm.??TheInternetisofcoursethe greatestproblemforthiscentury.Theworldwillhavetofindameansthrough somesortofinternationaltreatyofUnitedNationsinitiativetocontrolthe materialthat’snowgoingtotallyunregulatedintopeople’shomes.Thatsaidit willonlytakeonelittlecountrylikeParaguaytorefusetosignatreatyfor transmissiontobeunstoppable.Parentalcontrolisnevergoingtobe sufficient.??I’mstillveryworriedabouttheimpactofviolent videogameseventhoughresearcherssaytheirimpactismoderatedbythefact thatplayersdon’tsomuchexperiencethegameasenjoythetechnicalmanoeuvres 策略thatenableyoutowin.ButinrespectofviolenceinmainstreamfilmsI’m moreoptimistic.Quitesuddenlytasteshavechangedandit’snolonger StalloneorSchwarzeneggerwhoarethetopstarsbutLeonardoDiCaprio—thathas takeneverybodybysurprise.??Gothroughthemostsuccessful filmsinEuropeandAmericanowandyouwillfindvirtuallynonethatweare violent.QuentinTarantinodidn’tusherinanewviolentgenerationandfilms arebecomingmuchmoreprosocialthanonewouldhaveexpected.? ?Cinemagoingwillundoubtedlysurvive.Thenewmultiplexesareaglorious experienceofferingperfectSoundandpictureandverycomfortableseatsthins whichhaddiedoutinthe1980s.Ican’tbelievewe’veachievedthatonlyto throwitawayinfavorofhuddlingarounda14-inchcomputermonitortowatch digitallydeliveredmoviesathome.??Itwillbecomeincreasingly cheaptomakefilmswithcamerasbecomingsmallerandlighterbutremaining veryprecise.Thatmeansgreaterchancesfornewtalenttoemergeasitwillbe mucheasierforpeopletolearnhowtobebetterfilm-makers.People’sworking liveswillbeshorterinthefutureandonceretiredtheywillspendalotof timelearningtodothingsthatamusethem—likemakingvideos.Fiftyyearsonwe couldwellbemedia-saturatedasproducersaswellasaudience;insteadof writinglettersonewillsendlittlehomemoviesentitledMy Week.WhatdoesthatinIcan’tbelievewe’veachievedthatonlytothrowitawayinfavorPara.5referto?_____
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}阅读下面这篇短文短文后有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个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ?????????? ??????????? ?????????? ?{{B}}Alaska{{/B}}1.In1868AmericanswelcomedAlaskaintotheUnionas the49thstatesymbolizingachangeofattitudefromthatheldin1867when thepeninsulawaspurchasedfromRussia.ThenmostAmericanshadlittle interestin1500000squarekilometersoficebergsandpolarbears—beyond Canada’swesternbordersfarfromthesettledareasoftheUnitedStates.2. InthosesectionsofthestatewhichlieabovetheArcticCircleAlaskastill isalandoficebergsandpolarbears.Icemasseslieburiedintheearthwhich ispermanentlyfrozentoadepthof90ormoremeters.FromearlyMayuntil earlyAugustthemidnightsunneversetsonthisflattreelessregionbutthe suncannotmelttheicysoilmorethantwo-thirdsofameterdown.3.Alaska isAmerica’slargeststatebutonlyabout325000peoplelivethere.According toestimates800000hectaresofitslandareaarefitforplowingbutonly about640000hectaresarebeingcultivated.4.ArcticAlaskahasbeenthe homeofEskimosforcountlesscenturies.ItisbelievedthattheEskimosmoved therefromMongoliaorSiberiaprobablycrossingBeringStraitnamedforVitus BeringtheDanishseacaptainwhodiscoveredAlaskaonhisvoyageforRussiain 1741.TheEskimosarethestate’searliestknowninhabitants.Russianfur tradersestablishedsettlementsbutbythetimeAlaskawassoldtotheUnited Statesmostofthetradershaddeparted.5.In1896goldwasdiscoverednear theKlondikeRiverinCanadajustacrosstheAlaskanborder.Thousandsof AmericansrushedtotheregionontheirwaytoKlondike;someneverreturned. Alaskawasnevercompletelycutoffagainalthougheventodaytransportationis amajorproblem.ThereareonlytwomotorroutesfromtheU.S.mainlandand withinthestateeverytownhasitsownairfield.Planesflypassengersmail andfreighttothemostdistantvillages.6.Thegoldthatchangedlifeso suddenlyforAlaskawassoonendedandalthoughmanystoriesaboutminingcamps havebecomepartofAmericanliteraturethegoldfromAlaskanearthcontributed lesstoeconomicprogressthanthefishfromAlaskanwaters.Thefishcaughtin asingleyearrangeinvaluefrom$80millionto$90million.Fur-bearing animalsareplentifulintheforestsandstreamsandvaluablefursealsinhabit thewaters.Afterfishingthestate’schiefindustryislumberandthe productionofwoodpulp.InrecentyearsAlaska’ssinglemostimportant resourcehasbecomeoil.Thestatealsohaslargedepositsofcoalcoppergold andotherminerals.Paragraph3______??A.Richresourcesofthestate
{{*HTML*}}阅读下面这篇短文短文后有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个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ?????????? ??????????? ?????????? ?{{B}}Alaska{{/B}}1.In1868AmericanswelcomedAlaskaintotheUnionas the49thstatesymbolizingachangeofattitudefromthatheldin1867when thepeninsulawaspurchasedfromRussia.ThenmostAmericanshadlittle interestin1500000squarekilometersoficebergsandpolarbears—beyond Canada’swesternbordersfarfromthesettledareasoftheUnitedStates.2. InthosesectionsofthestatewhichlieabovetheArcticCircleAlaskastill isalandoficebergsandpolarbears.Icemasseslieburiedintheearthwhich ispermanentlyfrozentoadepthof90ormoremeters.FromearlyMayuntil earlyAugustthemidnightsunneversetsonthisflattreelessregionbutthe suncannotmelttheicysoilmorethantwo-thirdsofameterdown.3.Alaska isAmerica’slargeststatebutonlyabout325000peoplelivethere.According toestimates800000hectaresofitslandareaarefitforplowingbutonly about640000hectaresarebeingcultivated.4.ArcticAlaskahasbeenthe homeofEskimosforcountlesscenturies.ItisbelievedthattheEskimosmoved therefromMongoliaorSiberiaprobablycrossingBeringStraitnamedforVitus BeringtheDanishseacaptainwhodiscoveredAlaskaonhisvoyageforRussiain 1741.TheEskimosarethestate’searliestknowninhabitants.Russianfur tradersestablishedsettlementsbutbythetimeAlaskawassoldtotheUnited Statesmostofthetradershaddeparted.5.In1896goldwasdiscoverednear theKlondikeRiverinCanadajustacrosstheAlaskanborder.Thousandsof AmericansrushedtotheregionontheirwaytoKlondike;someneverreturned. Alaskawasnevercompletelycutoffagainalthougheventodaytransportationis amajorproblem.ThereareonlytwomotorroutesfromtheU.S.mainlandand withinthestateeverytownhasitsownairfield.Planesflypassengersmail andfreighttothemostdistantvillages.6.Thegoldthatchangedlifeso suddenlyforAlaskawassoonendedandalthoughmanystoriesaboutminingcamps havebecomepartofAmericanliteraturethegoldfromAlaskanearthcontributed lesstoeconomicprogressthanthefishfromAlaskanwaters.Thefishcaughtin asingleyearrangeinvaluefrom$80millionto$90million.Fur-bearing animalsareplentifulintheforestsandstreamsandvaluablefursealsinhabit thewaters.Afterfishingthestate’schiefindustryislumberandthe productionofwoodpulp.InrecentyearsAlaska’ssinglemostimportant resourcehasbecomeoil.Thestatealsohaslargedepositsofcoalcoppergold andotherminerals.Foraslongasthreemonthsofayearthesun______ontheice-coveredlandofAlaska.
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??????????? ??????{{B}}ProblemsofInternet{{/B}}? ?TheproportionofworkscutforthecinemainBritaindroppedfrom40per centwhenIjoinedtheBBFCin1975tolessthan4percentwhenIleft.ButI don’tthinkthat20yearsfromnowitwillbepossibletoregulateanymediumas closelyasIregulatedfilm.??TheInternetisofcoursethe greatestproblemforthiscentury.Theworldwillhavetofindameansthrough somesortofinternationaltreatyofUnitedNationsinitiativetocontrolthe materialthat’snowgoingtotallyunregulatedintopeople’shomes.Thatsaidit willonlytakeonelittlecountrylikeParaguaytorefusetosignatreatyfor transmissiontobeunstoppable.Parentalcontrolisnevergoingtobe sufficient.??I’mstillveryworriedabouttheimpactofviolent videogameseventhoughresearcherssaytheirimpactismoderatedbythefact thatplayersdon’tsomuchexperiencethegameasenjoythetechnicalmanoeuvres 策略thatenableyoutowin.ButinrespectofviolenceinmainstreamfilmsI’m moreoptimistic.Quitesuddenlytasteshavechangedandit’snolonger StalloneorSchwarzeneggerwhoarethetopstarsbutLeonardoDiCaprio—thathas takeneverybodybysurprise.??Gothroughthemostsuccessful filmsinEuropeandAmericanowandyouwillfindvirtuallynonethatweare violent.QuentinTarantinodidn’tusherinanewviolentgenerationandfilms arebecomingmuchmoreprosocialthanonewouldhaveexpected.? ?Cinemagoingwillundoubtedlysurvive.Thenewmultiplexesareaglorious experienceofferingperfectSoundandpictureandverycomfortableseatsthins whichhaddiedoutinthe1980s.Ican’tbelievewe’veachievedthatonlyto throwitawayinfavorofhuddlingarounda14-inchcomputermonitortowatch digitallydeliveredmoviesathome.??Itwillbecomeincreasingly cheaptomakefilmswithcamerasbecomingsmallerandlighterbutremaining veryprecise.Thatmeansgreaterchancesfornewtalenttoemergeasitwillbe mucheasierforpeopletolearnhowtobebetterfilm-makers.People’sworking liveswillbeshorterinthefutureandonceretiredtheywillspendalotof timelearningtodothingsthatamusethem—likemakingvideos.Fiftyyearsonwe couldwellbemedia-saturatedasproducersaswellasaudience;insteadof writinglettersonewillsendlittlehomemoviesentitledMy Week.WhichofthefollowingaboutInternetistrueaccordingtothepassage?______
{{*HTML*}}阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????? ??????????? ?????????{{B}}AWonderful Chip{{/B}}??Itistinyonlyaboutaquarterofaninchsquareand quiteflat.UnderamicroscopeitresemblesastylizedNavahorugortheaerial viewofarailroad{{U}}?51?{{/U}}yard.Likethe{{U}}?52 ?{{/U}}ofsandonabeachitismademostlyofsilicon{{U}}?53 ?{{/U}}oxygenthemostabundantelementonthesurfaceofthe earth.??Yetthisinertfleck小片stillunfamiliartothe{{U}} ?54?{{/U}}majorityofAmericanshasastonishingpower.Itischeap to{{U}}?55?{{/U}}producefastinfinitelyversatileand convenient.??Themiraclechiprepresentsaquantum重大的{{U}} ?56?{{/U}}inthetechnologyofmankindadevelopmentthat{{U}} ?57?{{/U}}thepastfewyearshasacquiredtheforceandsignificance associatedwiththedevelopmentofhandtoolsorthediscoveryofthesteam engine.JustastheIndustrialRevolution{{U}}?58?{{/U}}animmense{{U}} ?59?{{/U}}oftasksfrommen’s{{U}}?60?{{/U}}andenormously expandedproductivity{{U}}?61?{{/U}}themicrocomputerisrapidly assuminghugeburdensofdrudgeryfromthehumanbrainand{{U}}?62 ?{{/U}}expandingthemind’scapacities{{U}}?63?{{/U}}thatmanhas onlybeguntograsp.{{U}}?64?{{/U}}thechipamazingfeatsof{{U}} ?65?{{/U}}becomepossibleineverythingfromautomobileenginesto universitylaboratoriesandhospitalsfromfarmstobanksandcorporate officesfromouterspacetoababy’snursery.
{{*HTML*}}下面有3篇短文每篇短文后有5道题每题后面有4个选项请仔细阅读短文并根据短文回答其后面的问题从4个选项中选择1个最佳答案{{B}}第一篇{{/B}} ??????? ??????????? ?????{{B}}ANewFinding{{/B}}??British cancerresearchershavefoundthatchildhoodleukaemiaiscausedbyaninfection andclustersofcasesaroundindustrialsitesaretheresultofpopulation mixingthatincreasesexposure.TheresearchpublishedintheBritishJournalof Cancerbacksupa1988theorythatsomeasyetunidentifiedinfectioncaused leukaemia—nottheenvironmentalfactorswidelyblamedforthedisease.? ?Childhoodleukaemiaappearstobeanunusualresultofacommon infectionsaidSirRichardDollaninternationally—knowncancerexpertwho firstlinkedtobaccowithlungcancerin1950.Avirusisthemostlikely explanation.Youwouldgetanincreasedriskofitifyousuddenlyputalotof peoplefromlargetownsinaruralareawhereyoumighthavepeoplewhohadnot beenexposedtotheinfection.Dollwascommentingonthenewfindingsby researchersatNewcastleUniversitywhichfocusedonaclusterofleukaemia casesaroundtheSellafieldnuclearreprocessingplantinCumbriainnorthern England.Scientistshavebeentryingtoestablishwhytherewasmoreleukaemia inchildrenaroundtheSellafieldareabuthavefailedtoestablishalinkwith radiationorpollution.TheNewcastleUniversityresearchbyHeatherDickinson andLouiseParkershowedtheclusterofcasescouldhavebeenpredictedbecause oftheamountofpopulationmixinggoingonintheareaaslargenumbersof constructionworkersandnuclearstaffmovedintoaruralsetting.Ourstudy showsthatpopulationmixingcanaccountfortheSellafieldleukaemiacluster andthatallchildrenwhethertheirparentsareincomersorlocalsareata higherriskiftheyareborninanareaofhighpopulationmixingDickinson saidinastatementissuedbytheCancerResearchCampaignwhichpublishesthe BritishJournalofCancer.??Theirpaperaddscrucialweightto the1988theoryputforwardbyLeoKinlenacancerepidemiologistatOxford Universitywhosaidthatexposuretoacommonunidentifiedinfectionthrough populationmixingresultedinthedisease.Thispassageismainlyabout______.
{{*HTML*}}阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ??????????? ????{{B}}ConservationorWastedEffort?{{/B}}? ?Theblackrobin旅鸫isoneoftheworld’srarestbirds.Itisasmall wildbirdanditlivesonlyontheislandofLittleMangereoffthecoastof NewZealand.In1967therewereaboutfiftyblackrobinsthere;in1977there werefewerthanten.{{U}}?46?{{/U}}??Energeticsteps arebeingtakentopreservetheblackrobin.{{U}}?47?{{/U}}Theideais tobuyanotherislandnearbyasaspecialhomeareserveforthreatenedwild lifeincludingblackrobins.TheorganizerssaythatLittleMangereshouldthen berestocked重新准备withtherobin’sfood.Thousandsoftherequiredplantsare atpresentbeingcultivatedinNewZealand.??Isallthisconcern awasteofhumaneffort?{{U}}?48?{{/U}}Arewelosingoursenseofwhat isreasonableandwhatisunreasonable???Intheearth’slong longpasthundredsofkindsofcreatureshaveevolvedrisentoadegreeof successanddiedout.Inthelonglongfuturetherewillbemanynewand differentformsoflife.Thosecreaturesthatadaptthemselvessuccessfullyto whattheearthofferswillsurviveforalongtime.{{U}}?49?{{/U}}This isnature’sprovenmethodofoperation.??Theruleof selection—thesurvivalofthefittest—istheonebywhichhumanbeingshave themselvesarrivedonthescene.Webeingoneofthemostadaptablecreatures theearthhasyetproducedmaylastlongerthanmost{{U}}?50 ?{{/U}}Youmaytakeitasanotherrulethatwhenatlasthumanbeingsshow signsofdyingoutnoothercreaturewillextendapaw爪topostponeour departure.Onthecontrarywewillbehurriedout.??Lifeseems tohavegrowntootoughforblackrobins.Ileaveyoutojudgewhetherweshould trytodoanythingaboutit.??A.Somecreaturescertainsmall animalsinsectsandbirdswillalmostcertainlyoutlast比长久manforthey seemevenmoreadaptable.??B.Thosethatfailtomeetthe challengeswilldisappearearly.??C.Detailedstudiesaregoing onandapublicappealformoneyhasbeenmade.??D.Both representordersintheclassificationoflife.??E.Isitany businessofourswhethertheblackrobinsurvivesordiesout?? ?F.Thesearetheonlyblackrobinsleftintheworld.
{{*HTML*}}阅读下面这篇短文短文后有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个正确的小标题2第27～30题要求从所给的6个选项中选择4个正确选项分别完成每个句子 ?????????? ??????????? ?????????? ?{{B}}Alaska{{/B}}1.In1868AmericanswelcomedAlaskaintotheUnionas the49thstatesymbolizingachangeofattitudefromthatheldin1867when thepeninsulawaspurchasedfromRussia.ThenmostAmericanshadlittle interestin1500000squarekilometersoficebergsandpolarbears—beyond Canada’swesternbordersfarfromthesettledareasoftheUnitedStates.2. InthosesectionsofthestatewhichlieabovetheArcticCircleAlaskastill isalandoficebergsandpolarbears.Icemasseslieburiedintheearthwhich ispermanentlyfrozentoadepthof90ormoremeters.FromearlyMayuntil earlyAugustthemidnightsunneversetsonthisflattreelessregionbutthe suncannotmelttheicysoilmorethantwo-thirdsofameterdown.3.Alaska isAmerica’slargeststatebutonlyabout325000peoplelivethere.According toestimates800000hectaresofitslandareaarefitforplowingbutonly about640000hectaresarebeingcultivated.4.ArcticAlaskahasbeenthe homeofEskimosforcountlesscenturies.ItisbelievedthattheEskimosmoved therefromMongoliaorSiberiaprobablycrossingBeringStraitnamedforVitus BeringtheDanishseacaptainwhodiscoveredAlaskaonhisvoyageforRussiain 1741.TheEskimosarethestate’searliestknowninhabitants.Russianfur tradersestablishedsettlementsbutbythetimeAlaskawassoldtotheUnited Statesmostofthetradershaddeparted.5.In1896goldwasdiscoverednear theKlondikeRiverinCanadajustacrosstheAlaskanborder.Thousandsof AmericansrushedtotheregionontheirwaytoKlondike;someneverreturned. Alaskawasnevercompletelycutoffagainalthougheventodaytransportationis amajorproblem.ThereareonlytwomotorroutesfromtheU.S.mainlandand withinthestateeverytownhasitsownairfield.Planesflypassengersmail andfreighttothemostdistantvillages.6.Thegoldthatchangedlifeso suddenlyforAlaskawassoonendedandalthoughmanystoriesaboutminingcamps havebecomepartofAmericanliteraturethegoldfromAlaskanearthcontributed lesstoeconomicprogressthanthefishfromAlaskanwaters.Thefishcaughtin asingleyearrangeinvaluefrom$80millionto$90million.Fur-bearing animalsareplentifulintheforestsandstreamsandvaluablefursealsinhabit thewaters.Afterfishingthestate’schiefindustryislumberandthe productionofwoodpulp.InrecentyearsAlaska’ssinglemostimportant resourcehasbecomeoil.Thestatealsohaslargedepositsofcoalcoppergold andotherminerals.AlaskawasoriginallypartofRussiabutwasbought______.
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ??????????? ???{{B}}MobilePhoneandDiseases{{/B}}??Astudyby scientistsinFinlandhasfoundthatmobilephoneradiationcancausechangesin humancellsthatmightaffectthebraintheleaderoftheresearchteam said??ButDariusLeszczynskiwhoheadedthe2-yearstudyand willpresentfindingsnextweekataconferenceinQuebec魁北克saidmore researchwasneededtodeterminetheseriousnessofthechangesandtheirimpact onthebrainorthebody.??ThestudyatFinland’sRadiationand NuclearSafetyAuthorityfoundthatexposuretoradiationfrommobilephonescan causeincreasedactivityinhundredsofproteinsinhumancellsgrownina laboratoryhesaid.??Weknowthatthereissomebiological response.Wecandetectitwithourverysensitiveapproachesbutwedonot knowwhetheritcanhaveanyphysiologicaleffectsonthehumanbrainorhuman bodyLeszczynskisaid.??Nonethelessthestudytheinitial findingsofwhichwerepublishedlastmonthinthescientificjournal Differentiationraisesnewquestionsaboutwhethermobilephoneradiationcan weakenthebrain’sprotectiveshieldagainstharmfulsubstances.? ?Thestudyfocusedonchangesincellsthatlinebloodvesselsandon whethersuchchangescouldweakenthefunctioningoftheblood-brainbarrier whichpreventspotentiallyharmfulsubstancesfromenteringthebrainfromthe bloodstreamLeszczynskisaid.??Thestudyfoundthataprotein calledhsp27linkedtothefunctioningoftheblood-brainbarriershowed increasedactivityduetoirradiationandpointedtoapossibilitythatsuch activitycouldmaketheshieldmorepermeable能透过的hesaid.? ?Increasedproteinactivitymightcausecellstoshrink—nottheblood vesselsbutthecellsthemselves—andthentinygapscouldappearbetweenthose cellsthroughwhichsomemoleculescouldpass.hesaid.? ?Leszczynskideclinedtospeculateonwhatkindofhealthrisksthatcould posebutsaidaFrenchstudyindicatedthatheadachefatigueandsleep disorderscouldresult.??Thesearenotlife-threateningproblems butcancausealotofdiscomforthesaidaddingthataSwedishgrouphad alsosuggestedapossiblelinkwithAlzheimer’sdisease.??Where thetruthisdonotknowhesaid.??Leszczynskisaidthathe hiswifeandchildrenusemobilephonesandhesaidthathedidnotthinkhis studysuggestedanyneedfornewrestrictionsonmobilephone use.Accordingtothepassagewhatwouldbethefutureoftheuseofmobilephone?______
热门题库
更多
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
国际货运代理理论与实务
外贸综合业务
外贸外语
跟单员基础理论
湘公网安备 43130202000226号