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时间:2020-03-08
《新人教版必修1高考英语一轮复习Unit4Earthquakes课时作业含解析 .doc》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、Unit4Earthquakes课时作业Ⅰ.阅读理解A(2019·邯郸模拟C)Haveyouevernoticedtinyraisedareasonthebranchesofatree?Thesemayhavebeeninsects.Thesesmallinsectsfeedontreesap(汁液).Insectsonurbantreesarenotablymoreabundantthanthoseonruraltrees.Asaresult,urbantreessufferfromheavyinfestations(害虫横行),andareo
2、ftenunhealthyordie.Toprotectandrestoreurbantrees'health,weneedtodeterminethefactorsthatmakethesetreepestsmoresuccessfulinurbanhabitats.Livingorganismsinteractcloselywiththeirenvironment.Thewarmer,moredrought-stressedtreesharbormoresuccessfulpeststhancooler,lessdrought-stresse
3、dtrees.Ascitiesandnaturalhabitatsbecomehotteranddrier,damaginginsectswillbecomemoreabundantonurbantrees.Treeswithinurbanforestsarevaluableeconomicallyandfortheenvironmentalsustainability(可持续性)oftheregion.Morethanhalfoftheworld'spopulationlivesincities.Acrosstheglobe,peopleare
4、movingintocitiesatafasterratethanever.Rapidgrowthmayturncitiesintoplaceswithharderconditions.Althoughcitiesareprimarilymadeofbuildings,roads,parkinglots,andvehicles,therearestillplantsinthem.Thetreeswithinacityarereferredtoastheurbanforest.Urbanforestsofferverybigbenefitstohu
5、manandenvironmentalhealth.Theyimproveairandwaterquality,providehabitatforwildlife,cooldowntemperaturesandbeautifyourenvironment.Theymakecitieslivable.However,beingacitytreeisnoteasy.Heatreleasedbyhumanactivitiesistrappedincities.Asaresult,temperaturesinurbanareasareoftenwarme
6、rthantheirsurroundingruralareas.Wecallthisurbanwarmingortheurbanheatislandeffect.Urbanhabitatsaremostlymadeofsurfacesofasphalt(沥青)andconcrete.Thesesurfacesreducetheamountofrainwaterthatreachestreeroots.Asaresult,urbanforestsmaysuffer,whichcannegativelyaffectpeopleandthe10envi
7、ronment.Whatcanwedotorestoreurbanforests?Regularirrigationwhenpossiblemayhelpkeeppestpopulationsundercontrol.Plantingtreespeciesthataresuitabletohandleheatanddroughtstresswouldalsoreducetheoccurrenceofinsectpestoutbreaks.【语篇解读】 本文主要介绍了城市中的森林使城市宜居,但是人类的活动对城市的树木产生了极大的影响,所以我们应该为
8、保护城市树木采取行动。1.Whatmakestreepestsmoresuccessfulinthecitythaninruralare
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