2019_2020学年高中英语Unit4ExploringplantsSectionⅠWarmingUp.doc

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1、Unit4Exploringplants随着地球上自然地理环境的变迁，植物界自身在不断的矛盾中运动和发展着。一些类群的自然灭绝常伴随着新类群的形成，植物界的发展过程就是这样从低级向高级，从简单到复杂，不断地变化。GlobalwarmingimpactsplantsPlantshavelittleabilitytoadapttochangingclimates.Iftemperaturescontinuetheirrapidriseoverthenext100years，allplantspecieswillbeaffec

2、tedinsomeway.Growingseasons，rainfallpatterns，stormsandcyclesoffloodsanddroughtsareallpredictedtochangeasglobalwarmingworsens.Infact，someoftheseclimatechangesarealreadyoccurring.Scientistssaythatwarmingtemperaturesarecausingrapidchangesintherangeanddistributionofp

3、lantsworldwide.Ontheslopesofhighmountains，glacialmeadowsarebeingreplacedwithsagebrushastemperatureswarm.IntheArctic，fast-growingtreesareexpandingnorthward，extendingintoareasthatuntilrecentlyweretundra(冻原)．Inthenext100years，globalwarmingisexpectedtoreducetheworld’

4、stundraby30percent，withlethal(致命的)consequencesforspeciesthatlivethere.Adoublingofcarbondioxideinouratmosphere，whichscientistsexpecttooccurmidwaythroughthiscentury，willhaveadrasticimpactonourforests.ThestunningcolorsoffallfoliageinNewEnglandwillbecomeathingofthepa

5、stasitbecomestoowarmforsugarmaplestosurvive.Adoublingofcarbondioxidewouldalsoshiftthegrowingrangeforbirch，hemlockandbeechtrees300to600milesnorthward，leavingbehindhugeswathes(长条)ofdeadanddyingtrees.Theconsensusoftheworlds’leadingscientistsisthatglobalwarmingisreal

6、andalreadyunderway.Fornaturalecosystemsaroundtheglobe，itseffectscouldbedevastating.Allplantsandanimals，nomatterwheretheylive，willbeaffectedinsomeway.Achangingclimatehasthepotentialtoleadtothemassextinctionof4numerousspecies.SectionⅠ　WarmingUp&Reading—Preparingdis

7、tantadj.远方的；远处的；远的tightadj.紧的；紧密的fluencyn.流利；流畅doven.鸽子scalen.天平盘；磅秤endeavourn.尽力；竭力shavevi.&vt.剃；刮8．appealvi.(对某人)有吸引力；求助9．restrictionn.限制；约束10．balconyn.阳台；包厢1．datebackto追溯到……；远在……年代2．fallintoconflictwith陷入与……的冲突中3．inthedistance在远方4．takeinterestin...对……感兴趣5．resu

8、ltin产生；导致……Collecting_“exotic”_plants，as_they_are_called，datesbacktotheearliesttimes.收集所谓的“异国”植物要追溯到很久以前。However，it_was_not_untiltheeighteenthandnineteenthcent