2022版高考英语一轮复习课时提升作业七必修2Unit2TheOlympicGames作业课件新人教版.ppt

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1、课时提升作业七　必修2Unit2TheOlympicGames(限时35分钟)Ⅰ.阅读理解WecanvideochatwithastronautsaboardtheInternationalSpaceStationandwatchlivefootage(直播)fromthefrozenheightsofEverest.Butcommunicatingwithasubmarine(潜艇)oradiverisnotsoeasy.Thelackofpracticalmethodsforsharingdatabetweenunderwate

2、randairbornedeviceshaslongbeenafrustrationforscientists.Thedifficultyoriginatesfromthefactthatradiosignalsworkperfectlyinairtravelbutpoorlyinwater.Sonar(声呐)signalsusedbyunderwatersensorsreflectoffthesurfaceofthewaterratherthanreachingtheair.Now,researchersatMIThavedeve

3、lopedamethodwiththepotentialtorevolutionizeunderwatercommunication.“Whatwe’veshownisthatit’sactuallyfeasibletocommunicatefromunderwatertotheair,”saysFadelAdib,aprofessoratMIT’sMediaLab,wholedtheresearch.TheMITresearchersdesignedasystemthatusesanunderwatermachinetosends

4、onarsignalstothesurface,makingvibrations(震动)correspondingtothe1sand0softhedata.Asurfacereceiverthenreadsanddecodesthesetinyvibrations.TheresearcherscallthesystemTARF.“Ithasanumberofpotentialreal-worlduses,”Adibsays.Itcouldbeusedtofinddownedplanesunderwaterbyreadingsign

5、alsfromsonardevicesinaplane’sblackboxanditcouldallowsubmarinestocommunicatewiththesurface.Rightnowthetechnologyislow-resolution.TheinitialstudywasconductedintheMITswimmingpoolatmaximumdepthsofaround11or12feet.ThenextstepsfortheresearchersaretoseeifTARFisworkableatmuchg

6、reaterdepthsandundervaryingconditions—highwaves,storms,schoolsoffish.Theyalsowanttoseeiftheycanmakethetechnologyworkintheotherdirection—airtowater.Ifthetechnologyprovessuccessfulinreal-worldconditions,expect“textingwhilediving”tobethelatestunderwaterfashion.【文章大意】这是一篇说

7、明文,讲述的是水下与陆地上的通信在之前是无法实现的。随着科技的进步,这一通讯逐渐能够变为现实。1.WhatdoestheauthormainlytalkaboutinParagraph1?A.Thefutureofvideochatunderwaterandinair.B.Thedifficultyofcommunicationfromwatertoair.C.Thefrustrationsofdevelopingunderwaterdevices.D.Thecurrentsituationofcommunicatingwithas

8、ubmarine.【解析】选B。细节理解题。根据第一段的第二、三句“Butcommunicatingwithasubmarineoradiverisnotsoeasy.Thelackofpracticalmethodsforshari