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1、word资料下载可编辑阅读理解(建议用时:25分钟)A体裁议论文题材禽流感的防治词数373Tiredness,coughing,arunnynoseandasorethroat—amongallsicknessesthereisprobablynonemorecommonthantheflu,whichweallgetnowandthen.However,birdfluisacompletelydifferentstory.Tenyearsago,theH5N1birdflusweptacross15countrie
2、s,includingChina,withsufferersreportingchestpain,difficultybreathing,feverandseverecoughing.Morethan600peoplewereinfected,andabout60percentdied.NowanothertypeofbirdfluhitShanghaiandthreeneighboringprovinces,andthistimethevirusiscalledH7N9.BytheafternoonofApril1
3、1,thenewvirushadtakenninelivesoutof35infected,accordingtoXinhuaNewsAgency.The“H”and“N”inthevirus’namereferstotwokindsofproteinsonthesurfaceofthevirus.Anychangeofthenumbersofthetwoproteinsindicatesanewmutation(变异).Mostofthemutationsonlyaffectbirds,suchaschickens
4、andpigeons,anddon’tnormallyspreadtohumans.Butoncetheydo,theresultscanbedisastrous.“Anytimeananimalinfluenzaviruscrossestohumans,itisacauseforconcern,”MalikPeiris,virologist(病毒学家)attheUniversityofHongKong,toldNaturemagazine.TaketheSARSepidemic(传染病)10yearsagoasan
5、example.Thevirusbehindthediseaseisthoughttohavejumpedtohumansfromanimals.Theviruswasacomplete“stranger”tohumanbodies,whichhadn’tdevelopedanimmunityagainstit.ButthereissomethingmoreaboutthenewH7N9birdflu.UnliketheH5N1birdflu,whichcausesseveresicknessinbirds,theH
6、7N9hasbeenevolvingundertheradar(悄悄地)sinceittravelsbetweenbirdswithoutcausingnoticeableillness.Thatmakesitdifficulttokeeptrackofthedisease.Thegoodnewsisthatthere’ssofarnosignthatthevirusisspreadingfrompersontoperson.Butsincethereisnovaccineforthediseaseyet,theWo
7、rldHealthOrganizationrecommendsthatyouwashyourhandsaftermeetingwithsickpeopleandbeforeandafteryoueat专业技术资料word资料下载可编辑orpreparefood,andtheyalsosuggestavoidingcontactwithbirdsortheireggs.1.WhichofthefollowingstatementsisTRUEaccordingtothetext?A.TheH5N1birdfluturn
8、edouttohavesomethingtodowiththeSARSepidemic.B.Morethan600peopleacrosstheworlddiedfromtheH5N1birdflutenyearsago.C.Mostofthemutationsoftheproteinsinthebirdfluvirusareharmfulto
