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1、Healthyeating一、阅读理解。(2018·广西重点高中模拟)Peoplelovecellphones,whichiswhynineintenAmericansownone.Butdoesheavyuseofcellphonesposeariskofcancer?Thisquestionhascausedcontroversyformanyyears.Anewstudyinratsnowaugmentsthoseconcerns.Itsdatalinkedlongterm,intensee
2、xposuretoradiationfromcellphoneswithanincreasedriskofcancerintheheartorbrain.Theresultshaveyettobeconfirmed,theauthorsnote.Indeed,althoughtheratstudyfoundalinkbetweencellphoneradiationandcancer,itoffersnocluestowhysuchalinkmightexist,notesJonathanSame
3、t.HeteachespreventativemedicineanddirectstheInstituteforGlobalHealthattheUniversityofSouthernCaliforniainLosAngeles.Still,hecallsthenewstudy’sfindings“significant”．Theycouldleadtostudiesresearchinghowcellphoneradiationmightcausecancer,hesays.Phonesign
4、alsarerelayedbetweencelltowersandcellphonesviaradiowaves.Thisradiofrequency—orRF—radiationisatypeknownasnonionizing(非电离的).UnlikeXrays,nonionizingradiationdoesnotdepositenoughenergyintocellstoreleaseelectronsfromatomsormolecules,producingions.Soittends
5、tobefarlessharmfulthanionizingradiation,suchasXrays.Butthatdoesnotmeanradiowavesmightnotcauseharm.Inverylargedoses(量)thisradiationwillheatthebodyandcausetissuedamage.Butit’snotyetknownwhatmuchlowerRFlevelsmightdo,suchasthosefromcellphoneuse.Fiveyearsa
6、go,theWorldHealthOrganization’sInternationalAgencyforResearchonCancer,orIARC,concludedthatcellphoneuse“ispossiblycarcinogenic(致癌的)”．Itsconclusionwasbasedonwhatlittleresearchdatawasavailableatthattime.ButnoticethatIARCwasnotcertain.Itsaidonlythatphoneu
7、semight“possibly”causecancer.SoscientistsattheNationalToxicologyProgram,orNTP,investigatedfurther.【解题导语】 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？一项新的研究给出了一些线索。1．Whichofthefollowingcanreplacetheunderlinedword“augments”？A．figuresoutB．putsoutC．r
8、eferstoD．addstoD 解析：词义猜测题。画线词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.”可知，现在一项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。2．Inwhichas
