2019高考英语一轮优编选题unit2robots含解析新人教版选修7

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1、Unit2Robots李仕才一、阅读理解。   Anewstudyhasfoundtheamountofantibioticsgiventofarmanimalsisexpectedtoincreasebytwo­thirdsoverthenext15years.Researchersarelinkingthegrowingdependenceonthedrugstorisingdemandformeat,milkandeggs.Theresearcherswarnthedrugscouldquickenthedevelopmentofantibioti

2、cs­resistant(耐抗生素的)infections.SuchinfectionsarealreadyamajorpublichealthconcernintheUnitedStates.   Expertssaywhenpeoplestoplivinginpoverty,thefirstthingtheywanttodoiseatbetter,ratherthanearnmoremoney.Formostpeople,thatmeanstheirdietshouldcontainmoremeat.IncreasingprosperityinAsi

3、ahasmeantpeoplethereareeatingnearlyfourtimesasmuchmeat,milkanddairyproductsastheydid50yearsago.   Tomeetthatdemand,farmshaveputmanyanimalsintosmallerspaces.Astheanimalsarecrowdedtogether,oftentheeasiestwaytodealwithsomeoftheproblemsofcrowdingistogivethemantibiotics.It’sclearthatantib

4、ioticshelpanimalsstayhealthyinacrowdedenvironmentandgrowfaster.Butbacteriacandevelopresistancetothedrugsgradually,andtheantibiotics-resistantbacteriacanspreadtopeople.   Doctorsfindthatantibioticsthatonceworkedagainsttheinfectionsnolongerdo.Thebacteriahavelearnedwaystofightthemedicin

5、e.Doctorssaytheheavyuseofantibioticsinanimalsisoneofseveralreasonsforthegrowthofantibioticresistanceworldwide.IntheUnitedStates,atleasttwomillionpeoplegetdrug-resistantinfectionseachyear.Atleast23,000diefromaninfection.   RamananLaxminarayanheadstheCenterforDiseaseDynamics,Economicsa

6、ndPolicy.Hesaystheproblemisexpectedtogetworse.Hebelievestheuseofantibioticsinanimalswillsoonincreasesharply.Hesaysthatwillnotbegoodforhumanhealth.Heandotherresearcherswroteareportonthestudy,whichwaspublishedintheProceedingsofthe NationalAcademyofSciences.TheyuseddatafromtheUnitedNati

7、onsthattellhowandwherelivestock(牲畜)areraisedtoday.Theythenpredictedhowsuchproductionwouldchangeby2030.   Europehasbannedtheuseofantibioticstoincreaseanimalgrowth.AndsheaddstheUnitedStatesishopingtopersuadefarmerstostopusingantibioticsforthatpurpose.1.Whatisthepassagemainlyabout?A.How

8、tokeepfarman