湖北省2014高考英语 专项训练 阅读理解37.doc

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1、2014高考英语冲刺阅读理解专项50-37AAmericanresearcherssaydrinkingteamayhelpstrengthenthebody’sdefensesystemagainstinfection（感染）.DoctorsatBrighamandWomen’sHospitalinBoston,Massachusetts,didthestudy.Theteamstudiedachemicalfoundinblack,green,oolongandpekoetea.Thischemicalisanaminoacid（氨基酸）calledL-theanine.Thescie

2、ntistssayitmayincreasethestrengthofgammadeltaTcells.That’stheletterT,notthedrink.GammadeltaTcellsarepartofthebody’sdefenses.First,theresearchersmixedsomeofthesecellswithantigens（抗原）foundintheaminoacid.Antigenshelpthebodyreacttoinfection.Thenthescientistsaddedsomebacteria（细菌）.Withintwenty-fourhours

3、,thecellsproducedalotofinterferon,asubstancethatfightsinfection.Cellsnotmixedwiththeantigensdidnotproduceinterferon.Inthesecondpartofthestudy,elevenpeopledrankfivetosixcupsofblackteaeveryday.Tenotherpeopledrankthesameamountofinstantcoffee.Thatisdriedcoffeemixedwithhotwater.Twoweekslater,andagaintw

4、oweeksafterthat,theresearcherstestedthebloodofalltwenty-onepeople.Theyalsolookedatwhathappenedwhentheyaddedbacteriatothebloodcells.Theyfoundthattheteadrinkersproducedfivetimesmoreinterferonaftertheystarteddrinkingtea.Thecoffeedrinkersdidnotproduceinterferon.DoctorJackBukowskiledthestudy.Hesaysthea

5、ntigensaddedtothegammadeltaTcellswereresponsiblefortheincreasedreactiontothebacteria.Hesaysthestudyalsoshowedthatthecellswereabletorememberthebacteriaandfightthemagainthenexttime.Earlierresearchalreadyhasfoundthatteacanhelppreventheartdiseaseandcancer.DoctorBukowskisaysthenewstudymustberepeatedwit

6、hmorepeople.Ifthefindingsprovetobetrue,hesays,thenteadrinkingmightalsohelpprotectagainstbacterialinfections.HesaystheaminoacidL-theaninecouldberemovedfromteaandusedasadrugtostrengthenthebody’sdefenses.1.Wemayknowfromthetextthat________canbefoundindifferentkindsoftea.A.GammadeltaTcellsB.L-theanineC

7、.interferonD.bacteria答案解析：答案为B。本题为推理题。由第一段“Theteamstudiedachemicalfound4inblack,green,oolongandpekoetea.ThischemicalisanaminoacidcalledL-theanine.”可知，在black,green,oolongandpekoetea里面发现了叫做L-theanine的化学成分。故答案为B。2.T