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1、专题限时检测(十九) 阅读理解主旨大意类之标题归纳题(加★的为标题归纳题，本卷限时23分钟)A(2017·江苏省重点中学高三联考)InthewesternPacificOceanliesthedeepestplaceontheplanet—theMarianaTrench,whichrunsasdeepasabout7milesbelowtheocean'ssurface.That'sgreaterthantheheightofMountEverestmeasuringabout5andahalfmilesabovesealevel.TheMarianaTrenchis
2、hometoavarietyofsealife.Coralreefsandunderwatervolcanoesareallfoundthere.Butbecausefewhumanshavebeenabletogofarintothetrench,scientistsknowlittleaboutit.Nowtheyareworkingtochangethat.Recently,theOkeanosExplorerhasbeenonanexplorationthere.Remotelyoperatedvehiclessentoutfromitaretakingvide
3、osoflifeinitsdeepest,darkestareas.Scientistsaroundtheworld,alongwiththegeneralpublic,canwatchthevideosinrealtime.Thesevideosareshowingthemostmysteriouspartsoftheocean.MuchoftheareathattheOkeanosExplorerisexploringhasbeenprotectedsince2009aspartoftheMarianasTrenchMarineNationalMonument.Co
4、veringmorethan95,000squaremiles,itisoneoftheworld'slargestmarineprotectedareas.It'sverydark,sotheanimalsmustusemanyothersensesotherthansighttounderstandtheirsurroundings,findfoodandescapefromenemies.Thewaterisalsoverycold—slightlyabovefreezing—anditspressureisextremelyhigh.Thatmeansonlyc
5、ertainanimalscanlivethere,likeshrimp,crabs,andstarfish.Sofar,theexpedition'scamerashavefilmedavarietyofrarelyseendeepseacreatures,includingghostsharks,hugelobsters,andseapigs.Perhapsthemostamazingsightisbeautifulredjellyfishthatscientistshaveneverseenbefore.Scientistshopethisexpeditionwi
6、llhelpthemunlockthemysteriesoftheMarianaTrench.They'lllearnaboutthedeepseaanimalsandplantsfoundthere.They'llalsostudyitsuniquefeatures,includingunderwatermountains,mudvolcanoes,andhotspringsproducedbythevolcanoes.Theysaythatthisknowledgewillalsohelpscientistsbetterunderstandhowthedeepest
7、partoftheoceanaffectstherestoftheworld.“Theoceanplaysaroleintheairwebreathe,thefoodweeat,andthetransportationofthegoodswebuy—nottomentiontheweatherandclimatechange，”ascientistsaid.“Thedeepseamayalsoholdcuresforsomediseases.Howwillweknowwhatisoutthereifwearen'tlookingintoi
