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? ?A. industrially polluted soils? ?B. rock and soil chemistry? ?C. naturally polluted soils? ?D. ...
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{{*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}}LEDLighting{{/B}}??1?Anaccidental discoveryannouncedrecentlyhastakenLEDlightingtoanewlevelsuggesting itcouldsoonofferacheaperlonger-lastingalternativetothetraditional lightbulb.Thebreakthroughaddstoagrowingtrendthatislikelyto eventuallymakeThomasEdison’sbrightinventionobsolete.LEDsarealreadyused intrafficlightsflashlightsandarchitecturallighting.Theyareflexible andoperatelessexpensivelythantraditionallighting.??2 ?MichaelBowersagraduatestudent2atVanderbiltUniversitywasjust tryingtomakereallysmallquantumdotswhicharecrystalsgenerallyonlya fewnanometersbig.Quantumdotscontainanywherefrom100to1000electrons. They’reeasilyexcitedbundlesofenergyandthesmallertheyarethemore excitedtheyget.EachdotinBowers’particularbatchwasexceptionallysmall containingonly33or34pairsofatoms.??3?Whenyoushine alightonquantumdotsorapplyelectricitytothemtheyreactbyproducing theirownlightnormallyabrightvibrantcolor.ButwhenBowersshineda laseronhisbatchofdotssomethingunexpectedhappened.Hewassurprisedwhen awhiteglowcoveredthetable.Thequantumdotsweresupposedtoemitblue lightbutinsteadtheyweregivingoffabeautifulwhiteglow.? ?4?ThenBowersandanotherstudentgottheideatostirthedotsinto polyurethaneandcoatablueLEDlightbulbwiththemix.Thelumpybulbwasn’t prettybutitproducedwhitelightsimilartoaregularlightbulb.? ?5?LEDsproducetwiceasmuchlightasaregular60wattbulband burnforover50000hours.TheDepartmentofEnergyestimatesLEDlighting couldreduceU.S.energyconsumptionforlightingby29percentby2025.LEDs don’temitheatsothey’realsomoreenergyefficient.Andthey’remuchharder tobreak.??6?Quantumdotmixturescouldbepaintedonjust aboutanythingandelectricallyexcitedtoproducearainbowofcolors includingwhite.Themainlightsourceofthefuturewillalmostsurelynotbea bulb.Itmightbeatableawallorevenafork.Edison’sbrightinventionislikelytobeoutdatedbecause______.
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{{*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}}LEDLighting{{/B}}??1?Anaccidental discoveryannouncedrecentlyhastakenLEDlightingtoanewlevelsuggesting itcouldsoonofferacheaperlonger-lastingalternativetothetraditional lightbulb.Thebreakthroughaddstoagrowingtrendthatislikelyto eventuallymakeThomasEdison’sbrightinventionobsolete.LEDsarealreadyused intrafficlightsflashlightsandarchitecturallighting.Theyareflexible andoperatelessexpensivelythantraditionallighting.??2 ?MichaelBowersagraduatestudent2atVanderbiltUniversitywasjust tryingtomakereallysmallquantumdotswhicharecrystalsgenerallyonlya fewnanometersbig.Quantumdotscontainanywherefrom100to1000electrons. They’reeasilyexcitedbundlesofenergyandthesmallertheyarethemore excitedtheyget.EachdotinBowers’particularbatchwasexceptionallysmall containingonly33or34pairsofatoms.??3?Whenyoushine alightonquantumdotsorapplyelectricitytothemtheyreactbyproducing theirownlightnormallyabrightvibrantcolor.ButwhenBowersshineda laseronhisbatchofdotssomethingunexpectedhappened.Hewassurprisedwhen awhiteglowcoveredthetable.Thequantumdotsweresupposedtoemitblue lightbutinsteadtheyweregivingoffabeautifulwhiteglow.? ?4?ThenBowersandanotherstudentgottheideatostirthedotsinto polyurethaneandcoatablueLEDlightbulbwiththemix.Thelumpybulbwasn’t prettybutitproducedwhitelightsimilartoaregularlightbulb.? ?5?LEDsproducetwiceasmuchlightasaregular60wattbulband burnforover50000hours.TheDepartmentofEnergyestimatesLEDlighting couldreduceU.S.energyconsumptionforlightingby29percentby2025.LEDs don’temitheatsothey’realsomoreenergyefficient.Andthey’remuchharder tobreak.??6?Quantumdotmixturescouldbepaintedonjust aboutanythingandelectricallyexcitedtoproducearainbowofcolors includingwhite.Themainlightsourceofthefuturewillalmostsurelynotbea bulb.Itmightbeatableawallorevenafork.Paragraph3______
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{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??????????? ?{{B}}WingedRobotLearnstoFly{{/B}}??Learninghowtoflytook naturemillionsofyearsoftrialanderror--butawingedrobothascrackedit inonlyafewhoursusingthesameevolutionaryprinciples.? ?KristerWolffandPeterNordinofChalmersUniversityofTechnologyCUT inGothenburgSwedenbuiltawingedrobotandsetabouttestingwhetherit couldlearntoflybyitselfwithoutanypre-programmeddataonwhatflapping isorhowtodoit.??Tobeginwiththerobotjusttwitchedand jerkederratically.?Butgraduallyitmademovementsthatgainedheight. Atfirstitcheated--simplystandingonitswingtipswasoneearlyshort cut.Afterthreehourshowevertherobotabandonedsuchmethodsinfavorofa moreeffectiveflappingtechniquewhereitrotateditswingsthrough90degrees andraisedthembeforetwistingthembacktothehorizontalandpushing down.??Thistellsusthatthiskindofevolutioniscapableof comingupwithflyingmotionsaysPeterBentleywhoworksonevolutionary computingatUniversityCollegeLondon.Butwhiletherobothadworkedouthow besttoproduceliftitwasnotabouttotakeoff.There’sonlysomuchthat evolutioncandoBentleysays.Thisthingisnevergoingtoflybecausethe motorswillneverhavethestrengthtodoithesays.??The robothadmetre-longwingsmadefrombalsawoodandcoveredwithalightplastic film.Smallmotorsontherobotletitmoveitswingsforwardsorbackwardsup ordownortwistthemineitherdirection.??Theteamattachedthe robottotwoverticalrodssoitcouldslideupanddown.Atthestartofa testtherobotwassuspendedbyanelasticband.Amovementdetectormeasured howmuchliftifanytherobotproducedforanygivenmovement.Acomputer programfedtherobotrandominstructionsattherateof20persecondtotest itsflappingabilities.Eachinstructiontoldtheroboteithertodonothingor tomovethewingsslightlyinthevariousdirections.??Feedback fromthemovementdetectorlettheprogramworkoutwhichsetsofinstructions werebestatproducinglift.?Themostsuccessfuloneswerepairedupand offspringsetsofinstructionsweregeneratedbyswappinginstructions randomlybetweensuccessfulpairs.Thesenext-generationinstructionswerethen senttotherobotandevaluatedbeforebreedinganewgenerationandthe processwasrepeated.Howdidtherobotbehaveatthebeginningofthetest?
{{*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}}RescuePlatform{{/B}}??Intheaftermathofthe terroristattacksontheWorldTradeCentersecurityexpertsaretryingto developnewwaysofrescuingpeoplefromburningskyscrapers.Oneideaisa platformcapableofflyingverticallyandhoveringintheairlikeahelicopter. ?Theplatformwouldriseupanddownalongsideaskyscraperandpickup peopletrappedinhighstories.??Theideaforthevertical takeoffplatformwashatchedmorethantenyearsagobyaRussianaerospace engineerDavidMetreveliwhohassincemovedtoIsrael.Metreveli’sdesign calledtheEaglecallsfortwojetenginesthatturnfourlargehorizontal propellers.Thespinningofthepropellersgeneratesthenecessaryliftor upwardforcetoraisetheplatform.Themorepowerissuppliedtothe propellersthehighertheplatformrises.Movingtheplatformsidewaysinvolves applyingdifferingamountsofpowertoeachpropeller.? ?Helicoptersarenowusedinsomecasestogetpeopleoutofburning buildings.Escapebasketsslungfromthemdanglebesidethebuildingforpeople toclimbinto.Unfortunatelythebasketscannotreacheveryfloorofabuilding becausetheropesfromwhichtheyhangbecomeunstablebeyondacertain length.??SofarMetrevelihasbuiltasmall-scalemodelofthe Eagletotesthisidea.InthewakeofSeptember11hehasbeenabletosecure enoughfundingtostartbuildingalarger4-meterby4-meterprototypewhich hecallstheEaglet.Mr.MetreveliisdesigningforIsraelamoreadvancedformofrescueplatformthantheEagleortheEaglet.
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{{*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}}RescuePlatform{{/B}}??Intheaftermathofthe terroristattacksontheWorldTradeCentersecurityexpertsaretryingto developnewwaysofrescuingpeoplefromburningskyscrapers.Oneideaisa platformcapableofflyingverticallyandhoveringintheairlikeahelicopter. ?Theplatformwouldriseupanddownalongsideaskyscraperandpickup peopletrappedinhighstories.??Theideaforthevertical takeoffplatformwashatchedmorethantenyearsagobyaRussianaerospace engineerDavidMetreveliwhohassincemovedtoIsrael.Metreveli’sdesign calledtheEaglecallsfortwojetenginesthatturnfourlargehorizontal propellers.Thespinningofthepropellersgeneratesthenecessaryliftor upwardforcetoraisetheplatform.Themorepowerissuppliedtothe propellersthehighertheplatformrises.Movingtheplatformsidewaysinvolves applyingdifferingamountsofpowertoeachpropeller.? ?Helicoptersarenowusedinsomecasestogetpeopleoutofburning buildings.Escapebasketsslungfromthemdanglebesidethebuildingforpeople toclimbinto.Unfortunatelythebasketscannotreacheveryfloorofabuilding becausetheropesfromwhichtheyhangbecomeunstablebeyondacertain length.??SofarMetrevelihasbuiltasmall-scalemodelofthe Eagletotesthisidea.InthewakeofSeptember11hehasbeenabletosecure enoughfundingtostartbuildingalarger4-meterby4-meterprototypewhich hecallstheEaglet.ArescueplatformcalledtheEagleiscapableofmovingverticallybutnotsideways.
{{*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}}LEDLighting{{/B}}??1?Anaccidental discoveryannouncedrecentlyhastakenLEDlightingtoanewlevelsuggesting itcouldsoonofferacheaperlonger-lastingalternativetothetraditional lightbulb.Thebreakthroughaddstoagrowingtrendthatislikelyto eventuallymakeThomasEdison’sbrightinventionobsolete.LEDsarealreadyused intrafficlightsflashlightsandarchitecturallighting.Theyareflexible andoperatelessexpensivelythantraditionallighting.??2 ?MichaelBowersagraduatestudent2atVanderbiltUniversitywasjust tryingtomakereallysmallquantumdotswhicharecrystalsgenerallyonlya fewnanometersbig.Quantumdotscontainanywherefrom100to1000electrons. They’reeasilyexcitedbundlesofenergyandthesmallertheyarethemore excitedtheyget.EachdotinBowers’particularbatchwasexceptionallysmall containingonly33or34pairsofatoms.??3?Whenyoushine alightonquantumdotsorapplyelectricitytothemtheyreactbyproducing theirownlightnormallyabrightvibrantcolor.ButwhenBowersshineda laseronhisbatchofdotssomethingunexpectedhappened.Hewassurprisedwhen awhiteglowcoveredthetable.Thequantumdotsweresupposedtoemitblue lightbutinsteadtheyweregivingoffabeautifulwhiteglow.? ?4?ThenBowersandanotherstudentgottheideatostirthedotsinto polyurethaneandcoatablueLEDlightbulbwiththemix.Thelumpybulbwasn’t prettybutitproducedwhitelightsimilartoaregularlightbulb.? ?5?LEDsproducetwiceasmuchlightasaregular60wattbulband burnforover50000hours.TheDepartmentofEnergyestimatesLEDlighting couldreduceU.S.energyconsumptionforlightingby29percentby2025.LEDs don’temitheatsothey’realsomoreenergyefficient.Andthey’remuchharder tobreak.??6?Quantumdotmixturescouldbepaintedonjust aboutanythingandelectricallyexcitedtoproducearainbowofcolors includingwhite.Themainlightsourceofthefuturewillalmostsurelynotbea bulb.Itmightbeatableawallorevenafork.Overonequarterofenergyconsumptionforlightingcouldbesavedby2025if______.
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ?????????{{B}}JapaneseCar KeepsWatchforDrunkDrivers{{/B}}??Aconceptcardevelopedby JapaneseCompanyNissanhasabreathalyzer-likedetectionsystemandother instrumentsthatcouldhelpkeepdrunkorover-tireddriversoffthe road.??Thecar’ssensorscheckodorsinsidethecarandmonitora driver’ssweatfortracesofalcohol.Anin-carcomputersystemcanissuean alertorevenleekuptheignitionsystemifthedriverseemsover-the-limit. Theairodorsensorsarefixedfirmlyanddeeplyinthedriverandpassenger seatswhileadetectorinthegear-shiftknobmeasuresperspirationfromthe driver’spalm.??Othercarmakershavedevelopedsimilardetection systems.ForexampleSweden’sVolvohasdevelopedabreathalyzerattachedtoa car’sseatbeltthatdriversmustblowintobeforetheenginewill start.??Nissan’snewconceptvehiclealsoincludesa dashboard-mountedcamerathattracksadriversalertnessbymonitoringtheft eyes.ItwillsoundanalarmandissueaspokenwarninginJapaneseorEnglish ifitjudgesthatthedriverneedstopulloverandrest.??The cartechnologyisstillindevelopmentbutgeneralmanagerKazuhiroDoisays thecombinationofdifferentdetectionsystemsshouldimprovetheoverall effectivenessofthetechnology.Forexampleifthegear-shiftsensorwas bypassedbyapassengerusingitinsteadofthedriverthefacialrecognition systemwouldstillbeusedDoisays.Nissanhasnospecifictimetablefor marketingthesystembutaimstousetechnologytocutthenumberoffatalities involvingitsvehiclestohalf1995levelsby2015.??Thecar’s seatbeltcanalsotightenifdrowsinessisdetectedwhileanexternalcamera checksthatthecariskeepingtoitslaneproperly.HoweverDoiadmitsthat someofthetechnologysuchasthealcoholodorsensorshouldbeimproved.If youdrinkonebeerit’sgoingtoregistersoweneedtostudywhat’sthe appropriatelevelforthesystemtoactivatehesays.??Inthe UKsomeresearchgroupsareusingsimilaradvancedtechniquestounderstand driverbehaviorandtheeffectivenessofdifferentroad designs.WhichofthefollowingisNOTmentionedinParagraph6?
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ?????????{{B}}JapaneseCar KeepsWatchforDrunkDrivers{{/B}}??Aconceptcardevelopedby JapaneseCompanyNissanhasabreathalyzer-likedetectionsystemandother instrumentsthatcouldhelpkeepdrunkorover-tireddriversoffthe road.??Thecar’ssensorscheckodorsinsidethecarandmonitora driver’ssweatfortracesofalcohol.Anin-carcomputersystemcanissuean alertorevenleekuptheignitionsystemifthedriverseemsover-the-limit. Theairodorsensorsarefixedfirmlyanddeeplyinthedriverandpassenger seatswhileadetectorinthegear-shiftknobmeasuresperspirationfromthe driver’spalm.??Othercarmakershavedevelopedsimilardetection systems.ForexampleSweden’sVolvohasdevelopedabreathalyzerattachedtoa car’sseatbeltthatdriversmustblowintobeforetheenginewill start.??Nissan’snewconceptvehiclealsoincludesa dashboard-mountedcamerathattracksadriversalertnessbymonitoringtheft eyes.ItwillsoundanalarmandissueaspokenwarninginJapaneseorEnglish ifitjudgesthatthedriverneedstopulloverandrest.??The cartechnologyisstillindevelopmentbutgeneralmanagerKazuhiroDoisays thecombinationofdifferentdetectionsystemsshouldimprovetheoverall effectivenessofthetechnology.Forexampleifthegear-shiftsensorwas bypassedbyapassengerusingitinsteadofthedriverthefacialrecognition systemwouldstillbeusedDoisays.Nissanhasnospecifictimetablefor marketingthesystembutaimstousetechnologytocutthenumberoffatalities involvingitsvehiclestohalf1995levelsby2015.??Thecar’s seatbeltcanalsotightenifdrowsinessisdetectedwhileanexternalcamera checksthatthecariskeepingtoitslaneproperly.HoweverDoiadmitsthat someofthetechnologysuchasthealcoholodorsensorshouldbeimproved.If youdrinkonebeerit’sgoingtoregistersoweneedtostudywhat’sthe appropriatelevelforthesystemtoactivatehesays.??Inthe UKsomeresearchgroupsareusingsimilaradvancedtechniquestounderstand driverbehaviorandtheeffectivenessofdifferentroad designs.WhichofthefollowingstatementsisNOTtrueoftheJapaneseconceptcar?
{{*HTML*}}{{B}}第二篇{{/B}} ??????? ?????????{{B}}JapaneseCar KeepsWatchforDrunkDrivers{{/B}}??Aconceptcardevelopedby JapaneseCompanyNissanhasabreathalyzer-likedetectionsystemandother instrumentsthatcouldhelpkeepdrunkorover-tireddriversoffthe road.??Thecar’ssensorscheckodorsinsidethecarandmonitora driver’ssweatfortracesofalcohol.Anin-carcomputersystemcanissuean alertorevenleekuptheignitionsystemifthedriverseemsover-the-limit. Theairodorsensorsarefixedfirmlyanddeeplyinthedriverandpassenger seatswhileadetectorinthegear-shiftknobmeasuresperspirationfromthe driver’spalm.??Othercarmakershavedevelopedsimilardetection systems.ForexampleSweden’sVolvohasdevelopedabreathalyzerattachedtoa car’sseatbeltthatdriversmustblowintobeforetheenginewill start.??Nissan’snewconceptvehiclealsoincludesa dashboard-mountedcamerathattracksadriversalertnessbymonitoringtheft eyes.ItwillsoundanalarmandissueaspokenwarninginJapaneseorEnglish ifitjudgesthatthedriverneedstopulloverandrest.??The cartechnologyisstillindevelopmentbutgeneralmanagerKazuhiroDoisays thecombinationofdifferentdetectionsystemsshouldimprovetheoverall effectivenessofthetechnology.Forexampleifthegear-shiftsensorwas bypassedbyapassengerusingitinsteadofthedriverthefacialrecognition systemwouldstillbeusedDoisays.Nissanhasnospecifictimetablefor marketingthesystembutaimstousetechnologytocutthenumberoffatalities involvingitsvehiclestohalf1995levelsby2015.??Thecar’s seatbeltcanalsotightenifdrowsinessisdetectedwhileanexternalcamera checksthatthecariskeepingtoitslaneproperly.HoweverDoiadmitsthat someofthetechnologysuchasthealcoholodorsensorshouldbeimproved.If youdrinkonebeerit’sgoingtoregistersoweneedtostudywhat’sthe appropriatelevelforthesystemtoactivatehesays.??Inthe UKsomeresearchgroupsareusingsimilaradvancedtechniquestounderstand driverbehaviorandtheeffectivenessofdifferentroad designs.WhatisthefunctionofthecameramentionedinParagraph4?
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
Iwasn'tqualifiedforthejobreallybutIgotit{{U}}anyhow{{/U}}.
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
Thearmyshouldhaveoperated{{U}}inconjunction{{/U}}withthefleettoraidtheenemy'scoast.
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*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}}InvisibilityRing{{/B}}??Scientistscan’tyetmakean invisibilitycloakliketheonethatHarryPotteruses.Butforthefirsttime they’veconstructedasimplecloakingdevicethatmakesitselfandsomething placedinsideitinvisibletomicrowaves.??Whenapersonsees anobjecthisorhereyesensesmanydifferentwavesofvisiblelightasthey bounceofftheobject.Theeyeandbrainthenworktogethertoorganizethese sensationsandreconstructtheobject’soriginalshape.Sotomakeanobject invisiblescientistshavetokeepwavesfrombouncingoffit.Andtheyhaveto makesuretheobjectcastsnoshadow.Otherwisetheabsenceofreflectedlight ononesidewouldgivetheobjectaway.??Invisibilityisn’t possibleyetwithwavesoflightthatthehumaneyecansee.Butitisnow possiblewithmicrowaves.Likevisiblelightmicrowavesareaformofradiant energy.Theyarepartoftheelectromagneticspectrumwhichalsoincludesradio wavesinfraredlightultravioletraysXraysandgammarays.Thewavelengths ofmicrowavesareshorterthanthoseofradiowavesbutlongerthanthoseof visiblelight.??Thescientists’newinvisibilitydeviceisthe sizeofadrinkcoasterandshapedlikearing.Theringismadeofaspecial materialwithunusualability.Whenmicrowavesstriketheringveryfewbounce offit.Insteadtheypassthroughtheringwhichbendsthewavesalltheway arounduntiltheyreachtheoppositeside.Thewavesthenreturntotheir originalpaths.??Toadetectorsetuptoreceivemicrowaveson theothersideoftheringitlooksasifthewavesneverchangedtheirpaths --asiftherewerenoobjectintheway!Sotheringiseffectively invisible.??Whentheresearchersputasmallcopperloopinside theringittooisnearlyinvisible.Howeverthecloakingdeviceand anythinginsideitdocastapaleshadow.Andthedeviceworksonlyfor microwavesnotforvisiblelightoranykindofelectromagneticradiation.So HarryPotter’sinvisibilitycloakdoesn’thaveanyrealcompetition yet.Whatistrueofmicrowaves?
Contactyourdoctorifthecough{{U}}persists{{/U}}.
{{*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}}InvisibilityRing{{/B}}??Scientistscan’tyetmakean invisibilitycloakliketheonethatHarryPotteruses.Butforthefirsttime they’veconstructedasimplecloakingdevicethatmakesitselfandsomething placedinsideitinvisibletomicrowaves.??Whenapersonsees anobjecthisorhereyesensesmanydifferentwavesofvisiblelightasthey bounceofftheobject.Theeyeandbrainthenworktogethertoorganizethese sensationsandreconstructtheobject’soriginalshape.Sotomakeanobject invisiblescientistshavetokeepwavesfrombouncingoffit.Andtheyhaveto makesuretheobjectcastsnoshadow.Otherwisetheabsenceofreflectedlight ononesidewouldgivetheobjectaway.??Invisibilityisn’t possibleyetwithwavesoflightthatthehumaneyecansee.Butitisnow possiblewithmicrowaves.Likevisiblelightmicrowavesareaformofradiant energy.Theyarepartoftheelectromagneticspectrumwhichalsoincludesradio wavesinfraredlightultravioletraysXraysandgammarays.Thewavelengths ofmicrowavesareshorterthanthoseofradiowavesbutlongerthanthoseof visiblelight.??Thescientists’newinvisibilitydeviceisthe sizeofadrinkcoasterandshapedlikearing.Theringismadeofaspecial materialwithunusualability.Whenmicrowavesstriketheringveryfewbounce offit.Insteadtheypassthroughtheringwhichbendsthewavesalltheway arounduntiltheyreachtheoppositeside.Thewavesthenreturntotheir originalpaths.??Toadetectorsetuptoreceivemicrowaveson theothersideoftheringitlooksasifthewavesneverchangedtheirpaths --asiftherewerenoobjectintheway!Sotheringiseffectively invisible.??Whentheresearchersputasmallcopperloopinside theringittooisnearlyinvisible.Howeverthecloakingdeviceand anythinginsideitdocastapaleshadow.Andthedeviceworksonlyfor microwavesnotforvisiblelightoranykindofelectromagneticradiation.So HarryPotter’sinvisibilitycloakdoesn’thaveanyrealcompetition yet.Whatdoesthewordcoastermeaninthepassage?
{{*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}}CollegeSportsintheUS{{/B}}??College sportsintheUnitedStatesareahugedeal.AlmostallmajorAmerican universitieshavefootballbaseballbasketballandhockeyprogramsanddevote millionsofdollarseachyeartosports.Mostofthemearnmillions{{U}} ?51?{{/U}}aswellintelevisionrevenuessponsorships.Theyalso benefit{{U}}?52?{{/U}}fromtheaddedpublicitytheygetviatheir teams.Big-nameuniversities{{U}}?54?{{/U}}eachotherinthemost popularsports.FootballgamesatMichiganregularlydrawcrowdsofover90000. Basketball’snationalcollegiatechampionshipgameisaTV54onapar with与相同或相似anyothersportingeventintheUnitedStates{{U}}?55 ?{{/U}}perhapstheSuperBowlitself.Atanygiventimeduringfallorwinter onecan{{U}}?56?{{/U}}one’sTVsetandseethetopathletic programs—fromschoolslikeMichiganUCLADukeandStanford—{{U}}?57 ?{{/U}}infrontofpackedhousesandnationalTVaudiences.? ?Theathletesthemselvesarerecruitedandprovidedwithscholarships. Collegecoachesidentify{{U}}?58?{{/U}}teenagersandthengointohigh schoolsto{{U}}?59?{{/U}}thecountry’sbestplayerstoattendtheir universities.Therearestrictrulesabout{{U}}?60?{{/U}}coachescan recruit—norecruitingcallsafter9p.m.onlyoneofficialvisittoacampus— buttheyareoftenbentandsometimes{{U}}?61?{{/U}}.Topcollege footballprogramsofferscholarshipsto20or30playerseachyearandthose student-athleteswhentheyarrive{{U}}?62?{{/U}}campusreceivefree housingtuitionmealsbooksetc.??Inreturntheplayers{{U}} ?63?{{/U}}theprogramintheirsports.Footballplayersattop colleges{{U}}?64?{{/U}}twohoursadayfourdaysaweekfromJanuary toApril.Insummerit’sbacktostrengthandagilitytrainingfourdaysaweek untilmid-Augustwhencamp{{U}}?65?{{/U}}andpreparationforthe openingoftheSeptember-to-Decemberseasonbegins.Duringtheseasonpractices lasttwoorthreehoursadayfromTuesdaytoFriday.Saturdayisgameday. Mondaysareanofficiallymandateddayofrest.
{{*HTML*}}{{B}}第三篇{{/B}} ??????? ??????????? ?{{B}}WingedRobotLearnstoFly{{/B}}??Learninghowtoflytook naturemillionsofyearsoftrialanderror--butawingedrobothascrackedit inonlyafewhoursusingthesameevolutionaryprinciples.? ?KristerWolffandPeterNordinofChalmersUniversityofTechnologyCUT inGothenburgSwedenbuiltawingedrobotandsetabouttestingwhetherit couldlearntoflybyitselfwithoutanypre-programmeddataonwhatflapping isorhowtodoit.??Tobeginwiththerobotjusttwitchedand jerkederratically.?Butgraduallyitmademovementsthatgainedheight. Atfirstitcheated--simplystandingonitswingtipswasoneearlyshort cut.Afterthreehourshowevertherobotabandonedsuchmethodsinfavorofa moreeffectiveflappingtechniquewhereitrotateditswingsthrough90degrees andraisedthembeforetwistingthembacktothehorizontalandpushing down.??Thistellsusthatthiskindofevolutioniscapableof comingupwithflyingmotionsaysPeterBentleywhoworksonevolutionary computingatUniversityCollegeLondon.Butwhiletherobothadworkedouthow besttoproduceliftitwasnotabouttotakeoff.There’sonlysomuchthat evolutioncandoBentleysays.Thisthingisnevergoingtoflybecausethe motorswillneverhavethestrengthtodoithesays.??The robothadmetre-longwingsmadefrombalsawoodandcoveredwithalightplastic film.Smallmotorsontherobotletitmoveitswingsforwardsorbackwardsup ordownortwistthemineitherdirection.??Theteamattachedthe robottotwoverticalrodssoitcouldslideupanddown.Atthestartofa testtherobotwassuspendedbyanelasticband.Amovementdetectormeasured howmuchliftifanytherobotproducedforanygivenmovement.Acomputer programfedtherobotrandominstructionsattherateof20persecondtotest itsflappingabilities.Eachinstructiontoldtheroboteithertodonothingor tomovethewingsslightlyinthevariousdirections.??Feedback fromthemovementdetectorlettheprogramworkoutwhichsetsofinstructions werebestatproducinglift.?Themostsuccessfuloneswerepairedupand offspringsetsofinstructionsweregeneratedbyswappinginstructions randomlybetweensuccessfulpairs.Thesenext-generationinstructionswerethen senttotherobotandevaluatedbeforebreedinganewgenerationandthe processwasrepeated.Whatmeasuredhowmuchlifttherobotproduced?
{{*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}}RescuePlatform{{/B}}??Intheaftermathofthe terroristattacksontheWorldTradeCentersecurityexpertsaretryingto developnewwaysofrescuingpeoplefromburningskyscrapers.Oneideaisa platformcapableofflyingverticallyandhoveringintheairlikeahelicopter. ?Theplatformwouldriseupanddownalongsideaskyscraperandpickup peopletrappedinhighstories.??Theideaforthevertical takeoffplatformwashatchedmorethantenyearsagobyaRussianaerospace engineerDavidMetreveliwhohassincemovedtoIsrael.Metreveli’sdesign calledtheEaglecallsfortwojetenginesthatturnfourlargehorizontal propellers.Thespinningofthepropellersgeneratesthenecessaryliftor upwardforcetoraisetheplatform.Themorepowerissuppliedtothe propellersthehighertheplatformrises.Movingtheplatformsidewaysinvolves applyingdifferingamountsofpowertoeachpropeller.? ?Helicoptersarenowusedinsomecasestogetpeopleoutofburning buildings.Escapebasketsslungfromthemdanglebesidethebuildingforpeople toclimbinto.Unfortunatelythebasketscannotreacheveryfloorofabuilding becausetheropesfromwhichtheyhangbecomeunstablebeyondacertain length.??SofarMetrevelihasbuiltasmall-scalemodelofthe Eagletotesthisidea.InthewakeofSeptember11hehasbeenabletosecure enoughfundingtostartbuildingalarger4-meterby4-meterprototypewhich hecallstheEaglet.Themorejetenginesarefittedtothepropellersthemorepeopletheplatformcancarry.
{{*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}}LEDLighting{{/B}}??1?Anaccidental discoveryannouncedrecentlyhastakenLEDlightingtoanewlevelsuggesting itcouldsoonofferacheaperlonger-lastingalternativetothetraditional lightbulb.Thebreakthroughaddstoagrowingtrendthatislikelyto eventuallymakeThomasEdison’sbrightinventionobsolete.LEDsarealreadyused intrafficlightsflashlightsandarchitecturallighting.Theyareflexible andoperatelessexpensivelythantraditionallighting.??2 ?MichaelBowersagraduatestudent2atVanderbiltUniversitywasjust tryingtomakereallysmallquantumdotswhicharecrystalsgenerallyonlya fewnanometersbig.Quantumdotscontainanywherefrom100to1000electrons. They’reeasilyexcitedbundlesofenergyandthesmallertheyarethemore excitedtheyget.EachdotinBowers’particularbatchwasexceptionallysmall containingonly33or34pairsofatoms.??3?Whenyoushine alightonquantumdotsorapplyelectricitytothemtheyreactbyproducing theirownlightnormallyabrightvibrantcolor.ButwhenBowersshineda laseronhisbatchofdotssomethingunexpectedhappened.Hewassurprisedwhen awhiteglowcoveredthetable.Thequantumdotsweresupposedtoemitblue lightbutinsteadtheyweregivingoffabeautifulwhiteglow.? ?4?ThenBowersandanotherstudentgottheideatostirthedotsinto polyurethaneandcoatablueLEDlightbulbwiththemix.Thelumpybulbwasn’t prettybutitproducedwhitelightsimilartoaregularlightbulb.? ?5?LEDsproducetwiceasmuchlightasaregular60wattbulband burnforover50000hours.TheDepartmentofEnergyestimatesLEDlighting couldreduceU.S.energyconsumptionforlightingby29percentby2025.LEDs don’temitheatsothey’realsomoreenergyefficient.Andthey’remuchharder tobreak.??6?Quantumdotmixturescouldbepaintedonjust aboutanythingandelectricallyexcitedtoproducearainbowofcolors includingwhite.Themainlightsourceofthefuturewillalmostsurelynotbea bulb.Itmightbeatableawallorevenafork.Paragraph6______
{{*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}}RescuePlatform{{/B}}??Intheaftermathofthe terroristattacksontheWorldTradeCentersecurityexpertsaretryingto developnewwaysofrescuingpeoplefromburningskyscrapers.Oneideaisa platformcapableofflyingverticallyandhoveringintheairlikeahelicopter. ?Theplatformwouldriseupanddownalongsideaskyscraperandpickup peopletrappedinhighstories.??Theideaforthevertical takeoffplatformwashatchedmorethantenyearsagobyaRussianaerospace engineerDavidMetreveliwhohassincemovedtoIsrael.Metreveli’sdesign calledtheEaglecallsfortwojetenginesthatturnfourlargehorizontal propellers.Thespinningofthepropellersgeneratesthenecessaryliftor upwardforcetoraisetheplatform.Themorepowerissuppliedtothe propellersthehighertheplatformrises.Movingtheplatformsidewaysinvolves applyingdifferingamountsofpowertoeachpropeller.? ?Helicoptersarenowusedinsomecasestogetpeopleoutofburning buildings.Escapebasketsslungfromthemdanglebesidethebuildingforpeople toclimbinto.Unfortunatelythebasketscannotreacheveryfloorofabuilding becausetheropesfromwhichtheyhangbecomeunstablebeyondacertain length.??SofarMetrevelihasbuiltasmall-scalemodelofthe Eagletotesthisidea.InthewakeofSeptember11hehasbeenabletosecure enoughfundingtostartbuildingalarger4-meterby4-meterprototypewhich hecallstheEaglet.WiththehelpofjetenginestheEaglecanflyataspeedof100milesanhour.
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