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Unit4Exploringplants2植物是我们生活中必不可少的一个部分，那么你知道植物的重要性吗？Plantsformthebasicfoodstapleforalllifeforms.Theyarethemajorsourceoffoodandoxygenonearth，sincenoanimalcansupplythesenecessarycomponentswithoutplants.3Therearemanydifferenttypesofcashcropsthatproducemoneyforfarmers.Oliveoilcomesfromolives，cornoilcomesfromcorn，andpeanutoilcomesfrompeanuts.Typicalagriculturalproductslikecorn，wheat，rye，andriceareallconsideredcashcrops.Coffeeplantsproducebeansthatareusedtomakecoffee；cocaplantsgiveuschocolate；vanillaplantsgrowlongthinbeansthatareusedtoproducevanillaflavoring.4Plantsarealsousedinagriculturetohelpreducewindspeed.Plantingtreesinarowpreventsthewindfromblowingawaythevaluabletopsoil.Intheforest，treesactasshelterformanyorganisms.Plantsarealsoimportantfortheoverallecologyofanarea.Rootshelptostabilizesoilandpreventthesoilerosionbywaterrunoff.5Plantsarealsoimportantinouratmospherebecausetheyusecarbondioxideandgiveoffoxygenwhiletheyundergophotosynthesis.Plantsarealsousedintheurbansettingtoreducenoise，produceshade，andtobeautifyanarea.Treesaddvaluetohomesandcommunities.6Plantsareessentialtothebalanceofnatureandinpeople'slives.Greenplants，i.e.，thosepossessingchlorophyll(叶绿素)，producetheirownfoodandgiveoffoxygenintheprocesscalledphotosynthesis(光合作用)，inwhichwaterandcarbondioxidearecombinedbytheenergyoflight.Plantsaretheultimatesourceoffoodandmetabolicenergyfornearlyallanimals，whichcannotproducetheirownfood.Besidesfoods，plantproductsvitaltohumansincludewoodandwoodproducts，fibers，drugs，oils，latex，pigments，andresins.Coalandpetroleum(石油)arefossilsubstancesofplantorigin.Thusplantsprovidepeoplenotonlysustenancebutshelter，clothing，medicines，fuels，andtherawmaterialsfromwhichinnumerableotherproductsaremade.7两个诱思问题1．Whatisthepurposeofthesecondparagraph?2．Whyareplantsimportanttoouratmosphere?【答案】1.Givesomeexamplesabouttheuseofplants.2.Becausetheyusecarbondioxideandgiveoffoxygenwhiletheyundergophotosynthesis.8SectionⅠReading(WarmingUp,Pre-reading，Reading&Comprehending)9语言基础自测10Ⅰ.根据词性及英文释义写出单词的正确形式1．adj.farawayinspaceortime2．n．balanceforweighing；oneofthetwopansonabalance；relativesize，extent，scope，etc.3．n．struggle；fight；disagreement4．n．effort；attempttodosth.newordifficult5．adj.fixed，fastenedordrawntogetherfirmly116．n．actofputtingalimitonsb./sth.7．n．qualityofspeaking，writinginaneasysmoothmanner8．vi.tobeattractiveorinteresting(tosb.)【答案】1.distant2.scale3.conflict4.endeavour5.tight6.restriction7.fluency8.appeal12Ⅱ.短语填空datebackto；onalargescale；comeacross；quantitiesof；failto；takeinterestin；resultin；appealto1．Theyarepreparingforwar．2．Stressandtirednessoftenalackofconcentration.3．DoestheideaofworkingforIBMyou?4．ThiscastleRomantimes.5．Smallpoisonweredetectedinthedeadman'sstomach.13【答案】1.onalargescale2.resultin3.appealto4.datesbackto5.quantitiesof14教材语篇细研15Ⅰ.阅读P32－33课文内容，从三个选项中选择最佳答案1．Thefirstrecordedplantexplorationhappened.A．inthe18thcenturyB．about1，500yearsagoC．about1500BC2．Whoisnotacollectormentionedinthepassage?A．Fatherd'Incarville.B．TheQueenofEngland.C．RobertFortune.163．PlantscollectorsmetmanydifficultiesEXCEPT．A．lackofmoneyB．theconflictswithlocalpeopleC．restrictionsonthemovementofEuropeans174．WhichofthefollowingstatementsisTRUEaccordingtothetext?A．Thefirstplantcollectingexpeditiondatedbackto1500AD.B．EHWilsondiscoveredtheDoveTreeamongthewesternplantcollectors.C．Thesecondhalfofthenineteenthcenturywasaveryimportantperiodofplantexploration.185．What'sthetextmainlyabout?A．Transportingplantsoveralongdistancewasabigproblem.B．Therewasalotofplantcollectinginthe18thand19thcenturies.C．ManyplantcollectorsweresenttoacollectingtriptoChina.【答案】1.C2.B3.A4.C5.B19Ⅱ.阅读P32－33课文内容，完成下列表格TimePeople/PlantsHistoricEventsIn1500BCtheQueenofEgyptsentshipsto1.，animalsandothergoods2.Fatherd'IncarvillewassenttoBeijingIn1751theTreeof3.arrivedinEnglandIn1769SirJosephBankscollectedplantsin4.20In5.theTreeofHeavenwasintroducedin6.Between1843and1859RobertFortunemadeseveraltripstoChinaDuringthesecondhalfofthe19thcenturymanyCatholicmissionariesweresenttoChinafrom7.8.FatherFargessentseedsofDoveTreefromChinatoFranceIn18999.collectedalargequantityoftheseedsof10.inChina21【答案】1.gatherplants2.Inthe1740s3.Heavenseeds4.Australia5.17846.NorthAmerica7.France8.In18979.EHWilson10.theDoveTree22Ⅲ.阅读P32－33课文内容，完成下面课文缩写Theplantslooksofamiliar1.weoftendon'tknowthatmanyofthemarefromcountriesfaraway，which2.(date)backtotheearliesttimes.Manyplantscollectorsrealizedthevalueoftheplantsfromdistantlands.3.，theexplorationofthebotanicalworlddidn'tbegin4.alargescale5.the18thand19thcenturies.Ofcourse，theyhadmanydifficultiesinthetrips，6.23(face)manydangersincludingdisease，nearstarvation，severeenvironmentsand7.(conflict)withthelocalpeople.Themissionariescollectedlarge8.(quantity)ofspecimens，buttherewasnotenoughinWesterngardens.However，thebotanistswerevery9.(excite)withtheknowledgethatChinahasmanykindsofplants，socollectors10.(send)toChinatocollectmorekinds.24【答案】1.that2.dates3.However4.on5.until6.facing7.conflicts8.quantities9.excited10.weresent