北京地区成人本科学士学位英语统一考试
2023年0５月07日
?
PａrtI?ReadingCompreheｎsion（30%)
Dｉrｅcｔｉonｓ:Therｅaｒethreepａsｓagesinthisｐart.Eacｈpassageisfolloweｄbｙsomequesｔionsorunfｉniｓhedｓtａtemeｎtｓ.ＦoｒeａｃhｏｆｔhemthｅrｅarefoｕrchoｉcesmａrｋedＡ,B,CandD．YoushouｌddｅcidｅｏnｔhｅbesｔchoiceandｂlａｃkenthecoｒｒesｐondinglｅttｅｒontheＡnswerSheet.
?
Pａssaｇｅ1
QuestionｓIto５aｒebａｓｅｄontｈefolｌowｉngpａｓsaｇe:
Spendiｎg50mｉnutesｗitｈａcellpｈｏnｅclosｅtoyｏuｒearisｅnouｇhtochangｅbｒaincellactivityinthｅparｔofthebｒainclｏｓesttotheantｅｎnａ(天线）.Ｂuｔwｈetｈertｈatｃausｅsanyｈａrmisｎｏtcleａｒ,scｉentiｓｔsａtｔhｅNationaｌInsｔｉtuteofHｅａlthsａiｄａtacoｎｆerencelａstmoｎth，adｄingthaｔtｈestｕdywilｌｎｏｔliｋelysettleｃｏnceｒnsｏf?ａlｉnkbｅｔwｅｅnceｌlphｏｎesａndｂraincancｅr.“Whatweshｏwｅdisglucoｓｅ(葡萄糖)metabｏlism(代谢)(asiｇnofｂrａinａcｔiviｔy)inｃreasesinｔhebrａininpｅoｐlｅwhｏweｒｅｅｘposedtoａcellpｈoneｉnｔhearｅacｌosｅstｔotｈeanteｎna，”saｉdDr.ＮｏｒａＶolｋｏｗｏftheNIH，whosｅsｔuｄywａsｐublｉshediｎtheJoｕrnａlofthｅAmericanMeｄicaｌAｓｓｏciａtioｎ.（7６)Thestｕdｙwａｓmeantｔoexaminｅhｏwthebrainｒeactstoｅleｃtrｏmaｇneticｆiｅlｄscauｓedbywiｒeｌessphonesiｇｎals.
Volｋowsａｉdshewasｓurprisedthatthｅweakelectromagneticrａdiation(电磁辐射)frｏmｃellphonesｃouｌdaffｅctｂrａinaｃtｉｖiｔy,butshｅsaidthefinｄiｎｇsｄｏnｏtshedaｎyligｈｔonwhetｈercellphonescａusecanceｒ．“Thiｓstuｄydoｅsnotｉnanｙｗａyinｄｉｃａtethａt．Wｈatthesｔｕdydoｅsistoshoｗtheｈｕｍanbrainisｓensiｔivetoelecｔromagｎeｔｉcradｉaｔionｆromcellphoneeｘposures.”Uｓeoｆthｅｄeviceshasinｃreasｅddｒamａticallｙsiｎcetheywereintroducedｉnｔheｅａrly1９80ｓ,witｈabｏut5billioncｅlｌpｈoｎeｓnowｉnusｅｗｏrldｗｉde．
Somestudｉeshavelinｋedcellphoneexposurｅtoanｉnｃreaseｄrｉskｏfbｒaiｎcａｎcerｓ,ｂｕｔalaｒgesｔudybuthｅWorldHｅalｔｈOrgaｎｉzationｄｉdnｏｔoffeｒacleａranswｅrｔｏthｉｓ.Volkｏｗ’ｓtｅamsｔudｉed４７peoplewｈohａｄtｈｅirbrａinｅxamiｎedwhileaｃeｌlｐｈonewaｓtuｒnｅdoｎfor５０ｍinｕtｅsanｄ