资源描述：
《2019高考英语一轮复习练习题unit3lifeinthefuture含解析新人教版》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、Lifeinthefuture李仕才一、阅读理解阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。Plastic-EatingWormsHumansproducemorethan300milliontonsofplasticeveryyear.Almosthalfofthatwindsupinlandfills(垃圾填埋场),andupto12milliontonspollutetheoceans.Sofarthereisnoeffectivewaytogetridofit,butanewstudysuggestsananswermaylieinthestomachsofsom
2、ehungryworms.ResearchersinSpainandEnglandrecentlyfoundthatthewormsofthegreaterwaxmothcanbreakdownpolyethylene,whichaccountsfor40%ofplastics.Theteamleft100waxwormsonacommercialpolyethyleneshoppingbagfor12hours,andthewormsconsumedandbrokedownabout92milligrams,oralmost3%ofit.Toconfirmthattheworms’chewi
3、ngalonewasnotresponsibleforthepolyethylenebreakdown,theresearchersmadesomewormsintopaste(糊状物)andappliedittoplasticfilms.14hourslaterthefilmshadlost13%oftheirmass—apparentlybrokendownbyenzymes(酶)fromtheworms’stomachs.TheirfindingswerepublishedinCurrentBiologyin2017.FedericaBertocchini,co-authorofthes
4、tudy,saystheworms’abilitytobreakdowntheireverydayfood—beeswax—alsoallowsthemtobreakdownplastic.＂Waxisacomplexmixture,butthebasicbondinpolyethylene,thecarbon-carbonbond,isthereaswell,＂sheexplains,＂Thewaxwormevolvedamethodorsystemtobreakthisbond.＂JenniferDeBruyn,amicrobiologistattheUniversityofTenness
5、ee,whowasnotinvolvedinthestudy,saysitisnotsurprisingthatsuchwormscanbreakdownpolyethylene.Butcomparedwithpreviousstudies,shefindsthespeedofbreakingdowninthisoneexciting.Thenextstep,DeBruynsays,willbetoidentifythecauseofthebreakdown.Isitanenzymeproducedbythewormitselforbyitsgutmicrobes(肠道微生物)?Bertocc
6、hiniagreesandhopesherteam’sfindingsmightonedayhelpemploytheenzymetobreakdownplasticsinlandfills.Butsheexpectsusingthechemicalinsomekindofindustrialprocess—notsimply＂millionsofwormsthrownontopoftheplastic.＂1.Whatcanwelearnaboutthewormsinthestudy?A.Theytakeplasticsastheireverydayfood.B.Theyarenewlyevo
7、lvedcreatures.C.Theycanconsumeplastics.D.Theywindupinlandfills.2.AccordingtoJenniferDeBruyn,thenextstepofthestudyisto.A.identifyothermeansofthebreakdownB.findoutthesourceoftheenzymeC.confirmtheresearc
