2021高考英语一轮复习Unit2TheUnitedKingdom课时作业新人教版必修5.doc

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1、Unit2　TheUnitedKingdomⅠ.阅读理解A[2020·桂林市、崇左市联合模拟考试]Theworldisagreenerplacethanitwas20yearsago.AstudypublishedinthejournalNatureSustainabilitysaidthatrecentsatellitedatarevealsagreeningpatternthatisprominent(显著的)inChinaandIndia.ThestudyshowsthathumanactivityinChinaandIndiadominat

2、esthisgreeningoftheplanet,thankstotreeplantingandagriculture.TheeffectcomesmostlyfromambitioustreeplantingprogramsinChinaandintensiveagricultureinbothcountries.“ChinaandIndiaaccountforonethirdofthegreening，”saidleadauthorChiChenofBostonUniversity.“Thatisasurprisingfinding,cons

3、ideringthevagueideaoflanddegradation(毁坏)inpopulouscountriesfromoverexploitation，”addedChen.Chinaaloneaccountsfor25percentoftheglobalnetincreaseinleafareawithonly6.6percentofglobalvegetatedarea.ThegreeninginChinaisfromforests(42percent)andcroplands(32percent),butinIndia,itismos

4、tlyfromcroplands(82percent)withtheminorcontributionfromforests(4.4percent)．China'soutsizedcontributiontotheglobalgreeningtrendcomesinlargepartfromitsprogramstoconserveandexpandforestswiththegoalofpreventinglanddegradation,airpollution,andclimatechange.“Oncepeoplerealizethereis

5、aproblem,theytendtofixit，”saidRamaNemani,researchscientistandcoauthorofthestudy.“Inthe1970sand80sinIndiaandChina,thesituationaroundvegetationlosswasnotgood.Inthe1990s,peoplerealizedit,andtodaythingshaveimproved.Nowweseethathumansarecontributing.”Landareausedtogrowcropsiscompar

6、ableinChinaandIndia—morethan770,000squaremiles—andhasnotchangedmuchsincetheearly2000s.Yettheseregionshavegreatlyincreasedboththeirannualtotalgreenleafareaandtheirfoodproduction.Thiswasachievedthroughmultiplecroppingpractices,whereafieldisreplantedtoproduceanotherharvestseveral

7、timesayear.Productionofgrains,-8-vegetables,fruitsandmorehasincreasedbyabout35%～40%since2000tofeedtheirlargepopulations.1．Whatdidthestudymainlyfind?A．IndiaandChinaareleadingtheglobalgreeningeffort.B．Intensiveagricultureisthecauseofgloballanddegradation.C．ChinaandIndiahasgotthe

8、largestforestcoverageintheworld.D．Agricultureismorehelpfuline