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1、高考资源网(www.ks5u.com)www.ks5u.com来源：高考资源网版权所有：高考资源网(www.ks5u.com)Passage1Seasonalinfluenzaischaracterizedbyasuddenfever,cough,headache,muscleandjointpain,sorethroatandrunnynose.Mostpeoplerecoverfromfeverand1symptomswithinaweekwithoutrequiringmedicalattention.But
2、influenzacan2severeillnessordeathinpeopleathighrisk.Thetimefrominfectiontoillnessisabouttwodays.Yearlyinfluenzaepidemicscan3affectallagegroups,butthehighestriskofcomplicationsoccuramongchildrenyoungerthanagetwo,adultsage65orolder,andpeopleof4agewithcertainmedi
3、calconditions,suchaschronicheart,lung,kidney,liver,bloodormetabolicdiseases,orweakenedimmunesystems.Seasonalinfluenza5easilyandcansweepthroughschools,nursinghomesorbusinessesandtowns.Whenan6personcoughs,infecteddropletsgetintotheairandanotherpersoncanbreatheth
4、em7andbeexposed.Theviruscanalsobespreadbyhandsinfectedwiththevirus.8transmission,peopleshouldcovertheirmouthandnosewithatissuewhencoughing,and9theirhandsregularly.Drugsforinfluenzaare10insomecountriesandeffectivelypreventandtreattheillness.Someinfluenzaviruses
5、develop11totheantiviralmedicines,limitingtheeffectivenessoftreatment.Influenzaepidemicsoccur12duringautumnandwinterintemperateregions.Illnessesresultinhospitalizationsanddeathsmainlyamonghigh-riskgroups.Worldwide,theseannualepidemicsresultinaboutthreetofivemil
6、lion13ofsevereillness,andabout250000to500000deaths.Influenzacancauseseriouspublichealthandeconomicproblems.In14countries,epidemicscanresultinhighlevelsofworkerabsenteeismandproductivity15.16mostpeoplerecoverfromabout(轮)ofinfluenza,therearelargenumbersofpeoplew
7、honeedhospitaltreatmentandmany17diefromthediseaseeveryyear.18isknownabouttheeffectsofinfluenzaepidemicsindevelopingcountries.Themost19waytopreventthediseaseorsevereoutcomesfromtheillnessisvaccination.Vaccinationisespeciallyimportantforpeopleathigherriskofserio
8、usinfluenzacomplications,andforpeoplewholivewithorcarehighriskindividuals.()1.A.itsB.it’sC.allD.other()2.A.causeB.leadC.resultD.bring()3.A.lightlyB.slightlyC.seriouslyD.heavily()4.
