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“super

2、bugs”.ThewarningcomesfromaresearcherinSwitzerlandwholookedatlevelsofdrugsinfarmslurry.Hisfindingsareparticularly___53___becauseSwitzerlandisoneofthefewcountriestohavebannedantibioticsasgrowthpromotersinanimalfeed.___54___20,000tonsofantibioticsareusedinth

3、eEuropeanUnionandtheUSeachyear.Morethanhalfaregiventofarm-animalsto___55___diseaseandpromotegrowth.Butrecentresearchhasfoundadirectlinkbetweentheincreaseduseofthesefarmyarddrugsandthe___56___ofantibiotic-resistantbugsthatinfectpeople.Mostresearchersassume

4、thathumansbecomeinfected___57___theresistantstrainbyeatingcontaminatedmeat.Butfarmoreofthedrugsendupinmanurethaninmeat___58___,sayStephenMueller,oftheSwissFederalInstituteforEnvironmentalScienceandTechnologyinDubendorf.Andthemanurecontains___59___highleve

5、lsofbugsthatareresistanttoantibiotics,hesays.Withmillionsoftonsofanimalmanurespreadontofieldofcropssuchaswheatandbarleyeachyear,thispathwayseemsanequallylikely___60___forspreadingresistance,hesaid.Thedrugscontaminatethecrops,whicharetheneaten.Theycouldals

6、obeleachinginto___61___waterpumpedfromrocksbeneathfertilizedfields.Muellerisparticularlyconcerned___62___agroupofantibioticscalledsulphonamides.Theydonoteasilydegradeordissolveinwater.His___63___foundthatSwissfarmmanurecontainsahighpercentageofsulphonamid

7、es;eachhectareoffieldcouldbecontaminatedwithupto1kilogramofthedrugs.Thiscontaminationishighenoughtotriggerthedevelopmentofresistanceamongbacteria.Butvetsarenottreatingtheissue___64___.Thereisagrowingconcernattheextenttowhichdrugs,includingantibiotics,arep

8、ollutingtheenvironment.Manydrugsgiventohumansarealsoexcreted___65___andarenotbrokendownbyconventionalsewagetreatment.51.A.that52.A.invent53.A.shocking54.A.Many55.A.kill56.A.development57.A.fromB.asB.destroyB.warning