2105理工AB_完型填空_复习自测题

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1、理工B-1DungtoDeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibioticsgiventofarmanimals.Thedrugs,___51___areinmanuresprayedontofieldsasfertilizers,couldbegettingintoourfoodandwater,helpingto___52___anewgenerationofantibiotic-resistant“superbugs”.Thewarnin

2、gcomesfromaresearcherinSwitzerlandwholookedatlevelsofdrugsinfarmslurry.Hisfindingsareparticularly___53___becauseSwitzerlandisoneofthefewcountriestohavebannedantibioticsasgrowthpromotersinanimalfeed.___54___20,000tonsofantibioticsareusedintheEuropeanUnionandtheUSeachyear

3、.Morethanhalfaregiventofarm-animalsto___55___diseaseandpromotegrowth.Butrecentresearchhasfoundadirectlinkbetweentheincreaseduseofthesefarmyarddrugsandthe___56___ofantibiotic-resistantbugsthatinfectpeople.Mostresearchersassumethathumansbecomeinfected___57___theresistants

4、trainbyeatingcontaminatedmeat.Butfarmoreofthedrugsendupinmanurethaninmeat___58___,sayStephenMueller,oftheSwissFederalInstituteforEnvironmentalScienceandTechnologyinDubendorf.Andthemanurecontains___59___highlevelsofbugsthatareresistanttoantibiotics,hesays.Withmillionsoft

5、onsofanimalmanurespreadontofieldofcropssuchaswheatandbarleyeachyear,thispathwayseemsanequallylikely___60___forspreadingresistance,hesaid.Thedrugscontaminatethecrops,whicharetheneaten.Theycouldalsobeleachinginto___61___waterpumpedfromrocksbeneathfertilizedfields.Muelleri

6、sparticularlyconcerned___62___agroupofantibioticscalledsulphonamides.Theydonoteasilydegradeordissolveinwater.His___63___foundthatSwissfarmmanurecontainsahighpercentageofsulphonamides;eachhectareoffieldcouldbecontaminatedwithupto1kilogramofthedrugs.Thiscontaminationishig

7、henoughtotriggerthedevelopmentofresistanceamongbacteria.Butvetsarenottreatingtheissue___64___.Thereisagrowingconcernattheextenttowhichdrugs,includingantibiotics,arepollutingtheenvironment.Manydrugsgiventohumansarealsoexcreted___65___andarenotbrokendownbyconventionalsewa

8、getreatment.51.A.that52.A.invent53.A.shocking54.A.Many55.A.kill56.A.development57.A.fromB.asB.destroyB.warning