高考英语（九月）题型整合练（11）（含解析）

《高考英语（九月）题型整合练（11）（含解析）》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、2019高考英语（九月）题型整合练（11）一、阅读理解。ANowadaysmoreandmorepeoplearetalkingaboutgeneticallymodifiedfoods(GMfoods).GMfoodsdevelopfromgeneticallymodifiedorganisms(有机体),whichhavehadspecificchangesintroducedintotheirDNAbygeneticengineeringtechniques.Thesetechniquesaremuchmoreprecisewhereanorganismisexposedtoche

2、micalstocreateanonspecificbutstablechange.Formanypeople,thehightechproductionraisesallkindsofenvironmental,ethical,healthandsafetyproblems.Particularlyincountrieswithlongfarmingtraditions,theideaseemsagainstnature.Infact,GMfoodsarealreadyverymuchapartofourlives.Theywerefirstputonthemarketin1996

3、.AthirdofthecornandmorethanhalfthecottongrownintheU.S.lastyearwastheproductofbiotechnology,accordingtotheDepartmentofAgriculture.Morethan65millionacresofgeneticallymodifiedcropswillbeplantedintheUSthisyear. Thegeneticgenieisoutofthebottle.However,likeanynewproductenteringthefoodchain,GMfoodsmustb

4、esubjectedtocarefultesting.Inwealthycountries,thedebateaboutbiotechisnotsofiercebythefactthattheyhavealargenumberoffoodstochoosefrom,andasupplythatgoesbeyondtheneeds.Indevelopingcountriesdesperatetofeedfastgrowingandunderfedpopulations,thematterissimplerandmuchmoreurgent:dothebenefitsofbiotechou

5、tweightherisks?Thestatisticsonpopulationgrowthandhungeraredisturbing.Lastyeartheworld'spopulationreached6billion.TheUNstatesthatnearly800millionpeoplearoundtheworldareunhealthy.About400millionwomenofchildbearingagedon'thaveenoughiron,whichmeanstheirbabiesareexposedtovariousbirthdefeats.Asmanyas10

6、0millionchildrensufferfromvitaminAdeficiency,aleadingcauseofblindness.Howcanbiotechhelp?Geneticengineeringiswidelyusedtoproduceplantsandanimalswithbetternutritionalvalues.Biotechnologistshavedevelopedgeneticallymodifiedriceandtheyareworkingonotherkindsofnutritionallyimprovedcrops.Biotechcanalsoim

7、provefarmingproductivityinplaceswherefoodshortagesarecausedbycropdamageattributabletodrought,poorsoilandcropviruses.1.Thepassagemainlytalksabout________.A.theworld'sfoodproblemB.thedevelopmentinbiotechC.thegeneticallym