懂你英语L3Unit3.docx
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懂你英语L3Unit3
懂你英语L3-Unit-3
Unit3-1Listening
Therearemanyformsoflivesonearth,includinghumanbeings.
Lifeexistsinavarietyofconditions.
Someformsofliveliveinthewateryenvironment,liketheoceans.
Otherformsoflivescanbefoundinverydryareaslikedeserts.
However,foranyformoflivetoexist,conditionsmustberight.
Whentheconditionsaren’tright,thatformoflivescanextinct.
Tobecomeextinctmeanstodieoutcompletely.
Conditionsmustberightforlifetoexist.
Millionsofyearsago,therewereformsoflivesthatnolongerexist.
Whenconditionchanged,thisformoflifediedout.
Oneextinctioneventhappenedabout250millionyearsago.
Thisisthelargestextinctioneventofalltime.Manyformsoflivesbecomeextinct.
96%ofalllivesintheoceansdiedout.Mostinsectsalsobecameextinct.
Thiseventhappenedoveraperiodofseveralmillionyears.
Thecausesofthisextinctioneventarestillunknown.
Possiblecausesincludelargestvolcaniceruptionsandglobalwarming.
Somescientistsbelievethattherewereseveralcauses.
Theybelievethataseriesofeventscausedtheextinctions.
Scientistsareworkingforbetterunderstandwhatreallyhappened.
Inmoderntimes,wehumanbeingsfacechangingconditions.
Forhumanstolive,weneedcleanairandcleanwater.
Pollutionisnowagrowingproblemaroundtheworld.
Pollutionpoisonstheairandwaterthatwedependon.
Pollutedairmakespeoplesickandafraidtogetoutside.
Pollutedwaterpoisonsourfoodsupply.
Asaresult,weneverknowwhichfoodsaresafetoeat.
Humanbeingscanbenotliveinapoisonedenvironment.
Therefore,pollutionisamajorthreattoourexistence.
Humansneedtemperaturetobeinacomfortablerange.
Tobeinacomfortablerangemeanstobeneithertoohotnortoocold.
Withglobalwarming,globaltemperaturesarerising.
Asglobaltemperaturesrise,thepolaricecapswillmelt.
Asthepolaricecapsmelt,oceanlevelswillrise.
Areasofsomecountrieswillsoonbeunderwater.
Peoplewouldbeforcedtorelocatedfromfloodedareas.
Innature,evensmallchangescansometimeshavelargeeffects.
It’sdifficulttopredictwhat’sgoingtohappen.
Theentireecosystemthatwedependonischanging.
Someofthesechangingsareirreversible.Irreversiblechangescannotbeundone.
Let’shopethehumansaresmartenoughtounderstandhowtheworldischanging.
Withmoreunderstanding,wemakebetterchoicesaboutwhattodo.
Wecanfacethechallengeofthepollutionsandglobalwarming.
Weneedtodothisbeforeit’stoolate.
Thisplanetofearthisouronlyhomeandweneedtoprotectit.
Unit3-1vocabulary
Lizard蜥蜴
Mammalsarecoveredbyhairorfur,haveabackboneandwarm-blooded.
Allmammalsproducemilkfortheyoung.
Reptilesarecoveredbyscales,includessnakes,lizardsandturtles.
Reptileshaveabackboneandarecold-blooded,whichmeanstheyoftenrelyontheexternalresourcesofheat.
Birdsarecoveredbyfeatherandarewarmblooded.
Mostofthebirdscanflyandmanytypesofbirdmigrategreatdistances.
Mostinsectssuchantsandbeeshaveasmall3partsbodywith3pairsoflegs.
Someinsects,suchasmosquitoes,spreaddiseasesthatcausethedeathsofmanyhumans.
Unlikeanimals,plantsgettheenergythattheyneedfromthesun.
Plantsconvertlightenergyalongwithcarbonandwaterintochemicalenergy.
Scalesandrulersareusedtomeasureweightandlength.
Unitsofweightincludeskilogramsandpoundsandunitsoflengthincludescentimetersandinches.
Theseinstrumentsareusedtoobserveverylargeandverysmallobjects.
Telescopesareusedbyastronomersandmicroscopesareusedbybiologistsanddoctors.
Theseappliancesareusedinthekitchensofalmosteveryhome.
Stovesareusedtoheatfoodandrefrigeratorsareusedtokeepfoodscoolorcold.
Housetoolslikethese,areusedtobuildorrepairthings.
Hammersareusedtopoundinthenailsandscrewdriversareusedtoturnascrew.
Mammalsincludesomeofthemostintelligentanimalsonearth,suchaselephantsandhumanbeings.
Mosquitoescausethedeathofmorehumanthananyotheranimals.
Rulersareusedtomeasurelength
Wecanuseatelescopetoseeobjectsthatarefarway.
Unit3-1dialogue
Doyouknowwhatdateisittoday?
Whatdoyoumean,it’sthespecialday?
Oh,soyoudon’tremember.Rememberwhat?
What’sthespecial?
It’souranniversary.Westarteddatingayearagotoday.Oh,really.Sorry.
Justaminute,whatdoyouthinkthisis.Oh,it’sanecklace.
Doyoulikeit?
Yes,Ido.It’slovely.Especiallytheredheart.MayIputiton?
No,letmedoit.Soyoudidremember.
OfcourseIremember.It’sveryspecialforbothofus.Ihavesomethingforyoutoo.Youdo?
Yes,butyouhavetowaituntillater.Oh,Ican’twait.Tellmewhatisit.
Canyouguesswhatitis?
Couldyougivemeah?
Wewentthere3monthsago.Oh,youmeanAlfredo’s.Yes,areyouexcited?
Yousaidyoureallylikethefoodthere.
Yes,that’strue.Ialsorememberedthedessert.Doyou?
Yes,butlet’snottalkaboutthatnow.let’snowviewinthesurprise.
Thatrestaurantlooksnice.Yes,butitlooksexpensive.
Let’sgoinandlookatthemenu.Wow,themenulooksgreat,especiallythefish.
Yes,itlooksgoodbutlookatthoseprices.Let’strysomewhereelse.
Sometimeit’soktospendalittlemoney.
Yes,butthispriceisabittoohigh.Don’tyouthink?
Yes,theyareabithigh.Butdon’tyouthinkitworth?
Let’senjoyourselves.
Em,ok,ifyouputitthatway.Let’sseeifwecantakethetable.
I’vegotyouhaveacreditcard.Isurehopethefoodisgood.
Stopworrying,let’sjustenjoy.
Unit3-2Listening
Quickserveisahomerepaircompany.Itprovidesquick,reliablerepairservicestohomes.Quickservehandlesplumbingandelectricalissues24hoursaday.
Italsocleanstheroofs,fixesinternetconnectionsandreplacesbrokenwindows.
Forasmallfee,customerssubscribetotheservice.
Itsmaincustomersareelders,whichmeansolderpeople.
Whenevercustomershaveproblems,theycancallforhelp.
Thereisalsosmallchargeforeachservicecall.
Thecompanywasestablished5yearsagoandisgrowingrapidly.
Itstartedin1citybutit’snowin5cites.
Thecompanyplanstoexpandto10citieswithinthenext24months.
Ineachcity,thereissmallcentralofficeinalowrentareaofthecity.
Thecentralofficehandlesthebusinesses,advertising,payrollandbilling.
Italsotakescallsbycustomereitheronlineorbytelephone.
Ittakescall24hoursaday,7daysaweek.
60%ofthecompany’semployeesworkfromtheirhomes.
Whenacustomercallsintothecentraloffice,aserviceemployeeiscontactedit.
Theserviceemployeethencontactscustomerandsetsupanemployment.
Theseemployeesarehighlytrainedandprovideexcellentservices.
Inemergencies,suchasaseriousplumbingproblem,servicecanbeprovidedwithinanhour.Onereasonforthisisthattheserviceemployeesliveindifferentpartsofthecountry.Theyarenotcentrallocatedsoit’squickandeasyfortheytotraveltocustomers‘home.
Quickservehasanexcellentreputation.
Itspricesarereasonableanditservicesarequickandefficient.
Thecompany’sserviceemployeesareclean,politeandefficient.
Inthistypeofbusiness,persontopersoncontactisthekeytosuccess.
Witheachsatisfiedcustomer,morecustomerssubscribe.
Satisfiedcustomersrecommendquickservetotheirfriends.
Thiskindofword-of-mouthadvertisingisverycosteffective.
Costeffectmeansthattheresultsaregoodwithoutpayingahighprice.
Inotherword,qualityserviceprovidesitsownrewardstothecompany.
Thecompanytakegreatprideinbeinghonestwiththecustomers.
Therearenohiddenchargesfortheirservices.
Asaresult,thenumberofcustomersineachcityisgrowingrapidly.
Withtheagingpopulation,therearemoreelderlypeoplewhoneedhomerepairservices.Thesepeopleneedtohaveconfidenceintheserviceprovider.
Theydon’twanttocheated.
Thesepeopledon’tmindpayingareasonablefeeforhighqualityservice.
Highqualityservicesshouldberewarded.
Thecompanyprovidesarangeofserviceplans,eachwithadifferentsubscriptionprice.Theleastexpensiveserviceplaniscalledthebasicplan.
Thisplanprovidesnon-emergencyservicewithaverylowservicecharge.
Themostexpensiveservice’splanistheirVIPplan.
TheVIPplanprovidesemergencyservices24hoursadaywithnoadditionalservicecharge.
Italsoprovidesrebatesforcustomerswhodon’tcallforanyserviceduringtheyear.
Inaddition,quickservegivesbonuspointstocustomersforeachyeartheysubscribe.Thesebonusescanbeusedtobuynewappliancessuchasstovesandrefrigerators.
Ifthebusinesscontinuestogrow,theownersmaydecidetotakethecompanytopublic.Thismeansthatthepubliccanbuysharesofthecompany.
Itwouldthenchangefromprivate-ownedcompanytoapubliccompany.
Theownersbelievethattheirbusinessissuccessfulandcanexpandaroundworld.
Theyalsobelievethattakingtheircompanypubliccanmakethemrich.
Unit3-2vocabulary
Biologyisstudyoflife,includingitsstructureandevolution.
Biologystudyhowlifesurvivesandreproduces.
Chemistryisthestudyofmatter,includingthestructureofitsatomsandmolecules.Chemistsstudyhowvarioussubstancesinteractwitheachother.
Astronomyisoneoftheoldestsciences.
Astronomersstudythestructureandevolutionoftheuniverse,includingthestudyofstars,planetsandgalaxies.
Geologiesisthestudyofstructureofhistoryoftheear