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1、1•阅读理解Peoplelovecellphones,whichiswhynineintenAmericansownone.Butdoesheavyuseofcellphonesposeariskofcancer?Thisquestionhascausedcontroversyformanyyears.Anewstudyinratsnowaugmentsthoseconcerns.Itsdatalinkedlong-term,intenseexposuretoradiationfromcellph
2、oneswithanincreasedriskofcancerintheheartorbrain.Theresultshaveyettobeconfirmed,theauthorsnote・Indeed,althoughtheratstudyfoundalinkbetweencellphoneradiationandcancer,itoffersnocluestowhysuchalinkmightexist,notesJonathanSamet.Heteachespreventativemedic
3、ineanddirectstheInstituteforGlobalHealthattheUniversityofSouthernCaliforniainLosAngeles.StilLhecallsthenewstudy'sfindings“significant".Theycouldleadtostudiesresearchinghowcellphoneradiationmightcausecancer,hesays.Phonesignalsarerelayedbetweencelltower
4、sandcellphonesviaradiowaves.Thisradiofrequency—rRF—radiationisatypeknownasnon-ionizingGE电离的）•UnlikeX-rays,non-ionizingradiationdoesnotdepositenoughenergyintocellstoreleaseelectronsfromatomsormoleculesiproducingions・Soittendstobefarlessharmfulthanioniz
5、ingradiation,suchasX-rays.Butthatdoesnotmeanradiowavesmightnotcauseharm.Inverylargedoses（暈）thisradiationwillheatthebodyandcausetissuedamage.Butit"snotyetknownwhatmuchlowerRFlevelsmightdo,suchasthosefromcellphoneuse.Fiveyearsago,theWorldHealthOrganizat
6、ion5sInternationalAgencyforResearchonCancer,orIARC,concludedthatcellphoneuse“ispossiblycarcinogenic（致癌的）”•Itsconclusionwasbasedonwhatlittleresearchdatawasavailableatthattime.ButnoticethatIARCwasnotcertain.ltsaidonlythatphoneusemight"possibly"causecanc
7、er.SoscientistsattheNationalToxicologyProgram,orNTP,investigatedfurther.［语篇解读］本文是一篇说明文。人们喜欢用手机，90%的美国人都有手机。那么，过度使用手机是否会有患癌的风险呢？一项新的研究给岀了一些线索。1.Whichofthefollowingcanreplacetheunderlinedword"augments^?A•figuresoutB•putsoutC.referstoD.addsto解析：词义猜测题。画线词
8、前面提到过度使用手机是否有患癌的风险这一问题多年来引发的争议不断，再根据画线词后的"concerns^和“Itsdatalinkedlongterm,intenseexposuretoradiationfromcellphoneswithanincreasedriskofcancerintheheartorbrain.”可纟口，f见在一工页在老鼠身上进行的新研究增加了那些忧虑。故画线词与addsto意义相近。答案：D1.InwhichaspectdoesJonathanSamelt
