scientists in britain and the united states have made a new 阅读理解答案

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1、ScientistsinBritainandtheUnitedStateshavemadeanew阅读理解答案　　ScientistsinBritainandtheUnitedStateshavemadeanewkindofenzyme(酵素)thateatsplastics(塑料).Withitshelp,plasticscanbeturnedintosmallerpartsandgoawayquickly.Scientistsbelievethat,inthefuture,itcouldsolvetheprob

2、lemofplasticpollution.　　TheenzymeisabletobreakdownPET,aformofplastic.PETwasfirstmadeinthe1940sandisnowwidelyusedtomakeplasticbottles.Itcanremainintheenvironmentformanyyearsandpollutelargeareasoflandandwater.SoithasalwaysbeenaheadachetodealwiththewastefromPETan

3、dotherplastics.　　Theresearchersmadethediscovery(发现)whileexaminingthestructureofanaturalenzymeinJapan.TheyfoundthatthenaturalenzymewashelpingtobreakdownPETplastics.So,theydecidedtomakesmallchangestotheenzymebyaddingsomeaminoacids(氨基酸).Itmadethenaturalenzyme’spl

4、astic-eatingabilitiesworkfasterandbetter.　　JohnMcGeehan,oneoftheleadresearchers,said,“We’vemadeanimprovedenzyme.It’sbetterthanthenaturalone.Andwearetryingtomakemoreimprovementstoit.”Hewenton,“Theenzymeisnotharmfultohumansoranimals,anditisfriendlytotheenvironme

5、nt.Soweareconsideringputtingitintowideruse.”　　TheteamisnowtryingtomaketheenzymebreakdownPETinlargequantities(大量地).“We’llseethattheplasticpollutionmaybestoppedwiththistechnology.However,thereisstillalongwaytogo,”JohnMcGeehanadded.　　53.Accordingtothescientists,t

6、heenzymemaysolvetheproblemof_______pollution.　　A.airB.waterC.lightD.plastic　　54.Theunderlinedphrase“breakdown”inthepassageprobablymeans“______”inChinese.　　A.实验B.生产C.发明D.分解　　55.Researchersdiscoveredthatanaturalenzymehelpedeatplastics_______.　　A.inBritainB.inthe

7、USC.inJapanD.inChina　　56.WhichofthefollowingisTRUEaccordingtothepassage?　　A.Thescientistsarestilltryingtoimprovetheenzyme.　　B.Theenzymewillpollutelargeareasoflandandwater.　　C.Thenaturalenzymeworksbetterthantheimprovedone.　　D.Thenaturalenzymeisharmfultohumansan

8、danimals.　　[主要内容]本文既是一篇科普短文，又普及了环保常识。主要介绍了一种可以降解塑料的酵素，对人体，动物和环境无害，可以广泛应用于解决塑料污染问题。文章较为简单，大部分为细节题，只需定位准确，即可得出答案。第二问猜词题也较为简单，只需前后文理解即可，根据常识也可作出答案。主要考察学生查找信息，上下文理解能力。　　53【答案】D　　【考点】细节