人教新课标版高中英语选修六Unit4同步检测试卷一、阅读理解AIntheatmosphere，carbondioxideallowsthesun'sraystoenterbutpreventstheheatfromescaping.Accordingtoaweatherexpert'sprediction，theatmospherewillbewarmerintheyear2050thanitistoday，ifmancontinuestoburnfuelatthepresentrate.Ifthiswarminguptookplace，theicecapsinthepoleswouldbegintomelt，thusraisingsealevelseveralmetersandseverelyfloodingcoastalcities.Also，theincreaseinatmospherictemperaturewouldleadtogreatchangesintheclimateofthenorthernhemisphere.Inthepastconcernaboutaman-madewarmingoftheearthhasconcentratedontheArcticbecausetheAntarcticismuchcolderandhasamuchthickericesheet.ButtheweatherexpertsarenowpayingmoreattentiontoWestAntarctic，whichmaybeaffectedbyonlyafewdegreesofwarming，inotherwords，byawarmingonthescalethatwillpossiblytakeplaceinthenextfiftyyearsfromtheburningoffuels.SatellitepicturesshowthatlargeareasofAntarcticicearealreadydisappearing.Theevidencesuggeststhatawarminghastakenplace.Thisfitsthetheorythatcarbondioxidewarmstheearth.However，mostofthefuelisburntinthenorthernpartoftheearth，wheretemperaturesseemtobefalling.Scientistsconclude,therefore，thatuptonownaturalinfluencesontheweatherhaveexceededthosecausedbyman.Thequestionis:Whichnaturalcausehasthemosteffectontheweather?Onepossibilityisthebehaviorofthesun.Astronomersatoneresearchstationhavestudiedthehotspotsand“cold”spots，thatis，therelativelylesshotspots，onthesun.Thisseemstohaveagreatereffectonthedistributionoftheearth'satmosphericpressure，andconsequentlyonwindcirculation(循环)．Thesunisalsovariable(可变的)overalongterm.Itsheatoutput(输出)goesupanddownincycles.Thelatesttrendbeingdownwardisontheway.Butthatisonlyanimagination.1．Thecarbondioxideintheatmospherewould________.A．preventthesun'sraysfromreachingtheearth'ssurfaceB．raisethetemperatureoftheearth'ssurfaceC．accountforgreatchangesintheclimateD．meanawarmingupintheArctic2．Thearticlewaswrittentoexplain________.A．thegreenhouseeffectsB．thesolareffectsontheearthC．thecausesaffectingweatherD．thesolarweather3．Althoughthefuelisgreaterinthenorthernpart，temperaturesthereseemtobefalling.Thisis________.A．possiblyduetotheactivityofthesunB．possiblybecausetheicecapsinthepolesaremeltingC．duetotheeffectoftheearth'sclimateD．mainlybecausethecarbondioxideisrising4．Whatdoestheunderlinedword“exceeded”mean?A．Tobethesameas.B．Tobeslowerthan.C．Tobebetterthan.D．Tobebiggerthan.BOneofthenicestthingstododuringthecoldwinteristocurlup(蜷缩)withahotcupoftea.ButforBritons,teaisapopulardrinkallyearround.Afternoontea,hightea,builder’stea(astrongcupoftea,usuallywithfull-fatmilkandtwoteaspoonsofsugar),teagowns,teacakes,teahouses,breaks⋯theyarealleverydaynamesandphrasesintheUK.Teahas,infact,becomepartoftheBritishwayoflife.AndBritons’preferencesfortypesofteaandhowtodrinkitcanreallysayalotaboutthem.Britishanthropologist(人类学家)KateFoxwritesinherbookWatchingtheEnglishthatseveralclearmessagesaresentwheneveraBritonmakesacupoftea.Sheobservesthatthestrongestcupsofblackteaareusuallydrunkbytheworkingclass.Theteagetsweakerasonegoesupthesocialladder.Sugarmeanssomething.too.“Takingsugarinyourteaisthoughtbymanytobeasignofalower-classperson:evenonemakespeoplesuspicious；morethanoneandyouarelower-middleatbest;morethantwoandyouaredefinitelyworkingclass,”shewrites.Otherrulesinvolvehowmilkandsugarareadded,ifanyisadded.Fore...
