四川省高考英语一轮复习题型整合练（5）（含解析）.pdf

四川2019高考英语一轮题型整合练（5）

李仕才

一、阅读理解。

A

(2019·广西重点高中模拟)Peoplelovecellphones,whichiswhy

nineintenAmericansownone.Butdoesheavyuseofcellphones

poseariskofcancer?Thisquestionhascausedcontroversyfor

manyyears.Anewstudyinratsnowaugmentsthoseconcerns.Its

datalinkedlong­term,intenseexposuretoradiationfrom

cellphoneswithanincreasedriskofcancerintheheartor

brain.Theresultshaveyettobeconfirmed,theauthorsnote.

Indeed,althoughtheratstudyfoundalinkbetween

cellphoneradiationandcancer,itoffersnocluestowhysuch

alinkmightexist,notesJonathanSamet.Heteaches

preventativemedicineanddirectstheInstituteforGlobal

HealthattheUniversityofSouthernCaliforniainLos

Angeles.Still,hecallsthenewstudy’sfindings

“significant”．Theycouldleadtostudiesresearchinghow

cellphoneradiationmightcausecancer,hesays.

Phonesignalsarerelayedbetweencelltowersandcellphones

viaradiowaves.Thisradiofrequency—orRF—radiationisa

typeknownasnon­ionizing(非电离的).UnlikeX­rays,non­

ionizingradiationdoesnotdepositenoughenergyintocellsto

releaseelectronsfromatomsormolecules,producingions.Soit

tendstobefarlessharmfulthanionizingradiation,suchasX

­rays.Butthatdoesnotmeanradiowavesmightnotcauseharm.

Inverylargedoses(量)thisradiationwillheatthebody

andcausetissuedamage.Butit’snotyetknownwhatmuchlower

RFlevelsmightdo,suchasthosefromcellphoneuse.Fiveyears

ago,theWorldHealthOrganization’sInternationalAgencyfor

ResearchonCancer,orIARC,concludedthatcellphoneuse“is

possiblycarcinogenic(致癌的)”．

Itsconclusionwasbasedonwhatlittleresearchdatawas

availableatthattime.ButnoticethatIARCwasnotcertain.It

saidonlythatphoneusemight“possibly”causecancer.So

scientistsattheNationalToxicologyProgram,or