-Unit 2 教材串講課后提升- 高考英語(yǔ)一輪復(fù)習(xí)人教版（2019）選擇性必修第四冊(cè)

高考一輪復(fù)習(xí)：選擇性必修四Unit2教材串講提升練Ⅰ.閱讀理解ACanadiansareblessedwithanabundanceofnaturalwonderswithenoughlakes,mountainsandriverstoexploreforalifetime.We'vealsogotsomeofthemostamazingwaterfallsonEarth.HorseshoeFalls—NiagaraFalls,OntarioNiagaraFallsarethemostfamouswaterfallsinCanada—andunderstandablyso.Actuallytheyaremadeupofthreedifferentfalls,andthefittinglynamedHorseshoeFallsistheonlyonelocatedontheCanadianside,whichisthemostpowerfulinNorthAmerica.Multipleviewingoptionsareavailableincludingtouristshipsandsightseeingbuses.Nailicho(VirginiaFalls)—NahanniNationalParkReserve,NorthwestTerritoriesCominginattwicetheheightofNiagaraFalls,thismassivewaterfallislocatedontheSouthNahanniRiverintheNorthwestTerritories.Theremotelocationmeansitreceivesonlyabout1,000visitorsperyearwhomustmaketheirwaybyeitherboatorfloatplane.TakakkawFalls—YohoNationalPark,BritishColumbiaTakakkawtranslatedfromCreelooselymeans“themagnificent(壯麗的)”，andit'sasuitablewordforthesecond-highestwaterfallinCanada.Afterasteepdriveupawindingroad,TakakkawFallsisonlyashortdistancefromtheparkinglotalongawheelchairaccessiblepath.BridalVeilFalls—BridalVeilFallsProvincialPark,BritishColumbiaPrettyanddelicate,BridalVeilFallsislocatedjusteastofChilliwack,BritishColumbia,andreallydoeslooklikeitsname,withwatergentlypouringoversmoothrock.Aneasy15-minutewalktothewaterfalltakesyouthroughrichleaves.Tablesareavailabletohaveamealoutdoors,andtherearelotsofopportunitiesforviewingwildlifealongtheway.1.WhatdoweknowaboutHorseshoeFalls?A.Itiseasilyaccessible.B.Itconsistsofthreefalls.C.Itlimitstouristnumbers.D.ItcrossesNorthAmerica.2.HowcanvisitorsgotoTakakkawFalls?A.Bytouristship.B.Bycablecar.C.Byfloatplane.D.Bycar.3.WhatcanvisitorsdoinBridalVeilFalls?A.Swim.B.Camp.C.Picnic.D.Hunt.BAnewdeviceworkslikeasolarpanel,exceptthatitdoesn'tharvestenergyfromthesun.Itabsorbsenergyfromthecoldnightsky.Aprototype(原型)ofthedeviceproducedenoughelectricityatnighttopowerasmalllightbulb.Abiggerversionmightonedaylightroomsorchargephones.Itcouldalsopowerelectronicsinremoteorlow-resourceareasthatlackelectricity.ThedevicemakesuseofthetemperaturedifferencebetweenEarthandouterspace.Itthenusesthatdifferencetocreateelectricity.Aslongasonesideofitiscoolerthantheother,thegeneratorcanproduceelectricity.Thecoolersidefacestheskyandisattachedtoanaluminumplate.Thatplateissealedbeneathatransparentcoverandsurroundedwithinsulation(隔熱材料)tokeepoutheat.Thebottomofthegeneratorisattachedtoanexposedaluminumplate.Thatplateiswarmedbythelocalair.Atnight,thetopplatecangetacoupleofdegreesCelsiuscoolerthanthebottomofthegenerator.Researcherstesteda20-centimetreprototypeoneclearDecembernightinStanford，California.Thegeneratorproduceduptoabout25milliwattsofpowerpersquaremetreofthedevice.Thatwasenoughpowertolightasmalllight-emittingdiode,orLEDbulb.Furtherimprovementsmightincreaseitsproductiontoatleast500milliwattspersquaremetre.Todothat,thesystemmightneedmoreinsulationaroundthecooltopplate.Thedevicealsocouldhelppowerremoteweatherstationsorotherenvironmentaldevices,saysAaswathRaman.HeisamaterialscientistwhoworkedonthedeviceattheUniversityofCalifornia,LosAngeles.“Thismaybeusefulinpolarregionsthatdon'tseesunlightformonthsatatime，”Ramansays.“Ifyouhavesomelow-powerloadandyouneedtopoweritthroughthreemonthsofdarkness,thismightbeaway.”4.Whatcanweknowaboutthenewdevice?A.Itgainsenergyfromthesun.B.It'sbeenwidelyusedinlife.C.Itiscoolerthanasolarpanel.D.It'llbepopularinspecialareas.5.WhatdoestheauthormainlytalkaboutinParagraph3?A.Applicationfieldsofthedevice.B.Thedevelopingprocessofthedevice.C.Theworkingprincipleofthedevice.D.Significanteffectsofthedevice.6.Howcanthedeviceproducemoreelectricity?A.Byputtingmoreinsulationaroundthetopplate.B.Byusingitinextremelycoldandclearnights.C.Byattachingthebottomplatetoawarmplate.D.Bycoveringthetopplatewithatransparentlid.7.Whatcouldbeasuitabletitleforthetext?A.ADeviceUsingtheColdNightSkytoProduceElectricityB.ADeviceBringingNewHopeforThoseintheColdNightC.TheDifferenceBetweenaSolarPanelandaNewDeviceD.TheTemperatureDifferenceBetweenEarthandOuterSpaceⅡ.七選五ReasonsWhyYouShouldGotoCollegeTherearemanyimportantreasonswhyayoungpersonshouldconsidergoingtocollegeotherthanjustthepotentialfinancialrewards.Haveanewbeginning.Sometimesyoujustneedafreshstartinlife.1.________Goingtocollegeisaperfectopportunitytobreakoutofthatoldshellandbecomesomeonetotallynew.Learnsomethingyoulike.Itistruethatmanydegreesdonotprepareyoufortherealworldintermsofwhatyoulearn.2.________Takesometimetoenjoylearningwhatyouaretrulypassionateabout.3.________Whileparentsmaybeworriedabouttheirchildren'snew-foundfreedom,teensaregenerallyprettyexcitedaboutit.Collegecangiveayoungpersontheindependencetheythinktheyneedaswellastheopportunitytostartmakingtheirowndecisions.Developyourinterest.Ifyouareinterestedinpolitics,youcangetinvolvedinthestudentgovernment.Ifyouwanttobeajournalist,hereisanopportunitytogetaheadstartbyworkingfortheschoolpaper.4.________5.________Forsomepeople,thenumberonereasontogotocollegemaysimplybetheopportunitytomovetoanewplace.Manypeoplelivinginthenorthmaywanttogotoschoolinthesouthtoescapethecold.Othersmayjustwanttogetoutofasmalltownandseetheworld.Evenmovingfromachildhoodhousetoadormitoryinalocalcollegecampuscanbeagreatchange.A.Beindependent.B.Figureoutwhoyouare.C.Getachangeofscenery.D.Enjoythebesttimeofyourlifeincollege.E.Whateveryouareinterestedin,thereisagroupforit.F.However,acollegeeducationisanopportunitytolearnwhatyoulove.G.Youneedtogiveupyouroldhabitsandyouroldself,andbecometheperson