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2019-2020年高考英语一轮复习单元检测三十五Cloning外研版选修Ⅰ.阅读理解AAn18yearoldwhojustfinishedhighschoolhasdevelopedarevolutionarydevice装置whichallowsvisuallyimpairedorblindpeopletobemoremobile—afteringupwiththeideawhenhewas
12.“Tobeconsideredisarealhonor.Itmeanstheworkweredoingisreallyvaluable,”AlexDeanssaid.TheteenfromOntarioinCanadabegancreatingthetoolafterbeingcuriouswhilehelpingavisuallyimpairedladycrossthestreetoneday.“Shetoldmethatallexistingdevicesonlyletusersseeinonedirectionsotheycantknowwhatsgoingonaroundthem,”hetoldGOODmagazineafterseeingsheonlyhadastickandguidedog—twothingsthatarehardtoeby.ThedeviceknownasiAidusesGPSGlobalPositioningSystemandultrasonic超声波的technologytohelpvisuallyimpairedpeoplegetaroundsafely.Thebeltliketooleswithacontrolhandleandworksbyusingsoundwavestodiscoverobjectsintheuserspathandshowhow...。