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雅思（阅读）模拟试卷34(题后含答案及解析)
题型有：1.ReadingModule
ReadingModule(60minutes)
TheSun—AMixedBlessingA．PeopleinWesterncountrieshave
verymixedfeelingsaboutthesun.Ontheonehanditevokesmemoriesofbeaches,
summerholidaysandplayfultimes.Children’sbooksoftenpersonifythesunasa
smiling,happyface—typicallycontrastedwithangry,moodyrainclouds.Infact,the
sunhassuchpositiveconnotationsthatthedescriptorsunny‘’refersnotonlytoastate
ofweatherbutalsotocheery,cheerful,orjoyous‘’moodsanddispositionsamongst
humans.Ontheotherhand,manypeoplefearthesunbecauseofitsassociationwith
cosmeticdegenerationthatcancausepeopletolookmucholderthantheyactuallyare.
Evenmoreseriously,manypeopleseethesunasakiller—thisisbecauseexcessive
sunexposurecanleadtoskincancerwhichhasaveryhighmortalityrate.Soisthe
sunourfriendorafoe?Theanswersarecomplexandcontradictory.
B．Let’sstartwiththeworstnewsaboutthesun.Itisacarcinogen.Asthe
NationalToxicologyProgramReportonCarcinogensfromtheDepartmentofHealth
andHumanServicesreports,broad-spectrumUVradiationandsolarradiation(what
isknownassunrays‘’)arethoughttocontributetomostoftheestimated1.5million
skincancersdiagnosedintheUnitedStateseachyear.Thisgivesthesunthe
unfavorabledistinctionofbeingtheleadingcarcinogenintheUnitedStates—ahead
ofgeneticmutations,baddiets,cigarettes,alcohol,chemicalexposureandother
lifestylefactors.Ofthesediagnoses,8,000suffererswillperishfromthecondition.
Theprimarycauseofthismortalityismonasticmelanoma—molesthatbecome
cancerousandthenspreadmutatedcellsintothelymphnodesandeventuallythrough
the
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