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英语CET6听力短文基础练习题英语CET6听力短文基础练习题Onecannotputbacktheclock.以下是小编为大家搜索整理的英语CET6听力短文基础练习题，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!Questions13to15arebasedonthepassageyouhavejustheard.13A.20%adultsareinfectedwithHIVinBotswana.B.Therearen'taggressiveAIDSpreventioncampaigns.C.Botswana'sHIVinfectedratestillremainshigh.D.PeopleinBotswanasufferfromshortagesofvitamins.14A.ThecombinationofvitaminandmineralcanhelppatientswithHIV.B.Themultivitaminswouldhelpstrengthentheimmunesystem.C.Vitaminshelpthebodyabsorbmineralandkeepithealthy.D.HIVweakensthebody'snaturaldefensesforfightingdisease.15A.Itisfreeofchargetothepeoplewithlowincome.B.ItchangesHIVinfectioninthelongrun.C.ItslowsrapidlytheHIVdiseaseprogression.D.Itcan'ttaketheplaceofanti-retroviraldrugs.PassageTwoPatientswithHIVoftendevelopshortagesofvitaminsinthebody.Researchersexaminedwhethergivingthesepatientsamultivitaminwithamineralsupplementhelpstoimprovethebody'snaturaldefensesinfightingdisease.For30years,AIDShasbeenamajorhealthprobleminsomeAfricancountriessouthoftheSaharaDesert.(13)InBotswana,oneofeveryfouradultsisinfectedwithHIV.YetthecountryalsohasaggressiveAIDS,preventioncampaigns.ThatiswhyProfessorMariannaBaumdecidedtocarryoutherresearchonHIVandvitaminsthere.ProfessorBaumstudiedalmost900newlyinfectedadultsinBotswanawhohadnotyetbeengivenanti-AIDSdrugsthattargetHIV.Theadultsweredividedintogroups.EachgroupgotdifferentcombinationsofvitaminsB,C,E,andthemineralselenium,oraplacebo.MostpatientswithHIVdonothaveenoughvitamins.(14)ProfessBaumsaysshethoughtthemultivitaminsbythemselvesorthemineralseleniumbyitselfwouldhelpstrengthentheimmunesystem.Shewaswrong.(14)"Weweresurprisedtofindthatonlythecombinationwaseffective."StudiesshowthatwhenpeoplewithHIVbegintakinganti-retroviraldrugsshortlyafterinfection,theycanstayhealthyandarelesslikelytopassthevirustotheirsexualpartners.Butmanypatientsdonothaveenoughmoneytopayfortreatment.ProfessorBaumsaysthevitaminandmineraltherapycombinationshouldhelppeopleinlow-incomecountries
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