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1、到乌蒙山区的昭通;从甘肃中部的定西,到内蒙古边陲的阿尔山,看真贫、知真贫,真扶贫、扶真贫,成为“花的精力最多”的事;“扶贫先扶志”“扶贫必扶智”“实施精准扶贫”Unit4GlobalwarmingⅠ.阅读理解MeasuringaHurricanebySoundUnderwaterThereareacoupleofwaystoforecastthedestructivepotentialofahurricanesothatpeopleinharm’swaycantakeadequateprecautions.Satelliteimagesofcloudpat
2、ternscanbeanalyzedtoestimatepeakwindspeeds,buttheestimatesareoftenwayoffthemark.Specializedaircraftcanflyintoastormtomeasurethewindsdirectly,buttheflightsarecostly.ResearchersattheMassachusettsInstituteofTechnologycomeupwithathirdway:listeningtoastormunderwater.Inapapertobepublish
3、edinGeophysicalResearchLetters,NicholasC.Makrisandaformergraduatestudent,JoshuaD.Wilson,reportastrongconnectionbetweentheintensityofsoundrecordedbyanunderseamicrophoneinthemid-Atlanticandthewindpowerofahurricanethatpassedoverit.Theysaythatsuchmicrophones,knownashydrophones,couldbe
4、asafeandrelativelyinexpensivemeansofestimatinghurricaneforce.Dr.MakrisandDr.Wilson,whoisnowwithAppliedPhysicalSciencesCorporation,workedoutthetheoryofunderwateracoustic(声学的)monitoringofstormsina2013paper.“Tobeveryfrankwithyou,it’samysterywhatmakesstormsnoisyunderwater,”Dr.Makrissa
5、id.Themostpopularideacurrentlyisthatithassomethingtodowithoscillatingairbubbles(气泡振动).Theresearchersthenwentlookingforexperimentaldatatobacktheirtheory,andfounditfromahydrophoneplacedatadepthof2,500feetbytheNationalAtmosphericandOceanicAdministration.IthappenedthatHurricaneGertpas
6、sedovertheareainSeptember1999,andahurricane-hunterplanedirectlymeasuredthewindspeedatthesametime.Thehydrophonedatashowedsoundintensityrisingwhenthestorm’soutsidewind“wall”passedover,andagainwhentheinsidewall,themostdestructivepartofthestormneartheeye,passedover.“Wegotabeautifulcon
7、nection,”Dr.Makrissaid,“betweenthehydrophonedataandtheactualwindspeedsasmeasuredbytheaircraft.”Dr.Makrisisconductingadditionalexperiments,workingwiththeMexicanNavyoffthewestcoastofMexico.Theeventualgoal,hesaid,wouldbepermanenthydrophonesinknownhurricanezonesortemporaryonesthatcoul
8、dbeeasilylaidbyplaneorshipinthepa