懂你英语L3Unit3.docx

懂你英语L3Unit3.docx

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懂你英语L3Unit3

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,reliablerepairstohomes.Quickservehandlesplumbingandelectricalissues24hoursaday.

Italsocleanstheroofs,fixesinternetconnectionsandreplacesbrokenwindows.

Forasmallfee,customerssubscribetothe.

Itsmaincustomersareelders,whichmeansolderpeople.

Whenevercustomershaveproblems,theycancallforhelp.

Thereisalsosmallchargeforeachcall.

Thecompanywasestablished5yearsagoandisgrowingrapidly.

Itstartedin1citybutit’snowin5cites.

Thecompanyplanstoexpandto10citieswithinthenext24months.

Ineachcity,thereissmallcentralofficeinalowrentareaofthecity.

Thecentralofficehandlesthebusinesses,advertising,payrollandbilling.

Italsotakescallsbycustomereitheronlineorbytelephone.

Ittakescall24hoursaday,7daysaweek.

60%ofthecompany’semployeesworkfromtheirhomes.

Whenacustomercallsintothecentraloffice,aemployeeiscontactedit.

Theemployeethencontactscustomerandsetsupanemployment.

Theseemployeesarehighlytrainedandprovideexcellents.

Inemergencies,suchasaseriousplumbingproblem,canbeprovidedwithinanhour.Onereasonforthisisthattheemployeesliveindifferentpartsofthecountry.Theyarenotcentrallocatedsoit’squickandeasyfortheytotraveltocustomers‘home.

Quickservehasanexcellentreputation.

Itspricesarereasonableanditsarequickandefficient.

Thecompany’semployeesareclean,politeandefficient.

Inthistypeofbusiness,persontopersoncontactisthekeytosuccess.

Witheachsatisfiedcustomer,morecustomerssubscribe.

Satisfiedcustomersrecommendquickservetotheirfriends.

Thiskindofword-of-mouthadvertisingisverycosteffective.

Costeffectmeansthattheresultsaregoodwithoutpayingahighprice.

Inotherword,qualityprovidesitsownrewardstothecompany.

Thecompanytakegreatprideinbeinghonestwiththecustomers.

Therearenohiddenchargesfortheirs.

Asaresult,thenumberofcustomersineachcityisgrowingrapidly.

Withtheagingpopulation,therearemoreelderlypeoplewhoneedhomerepairs.Thesepeopleneedtohaveconfidenceintheprovider.

Theydon’twanttocheated.

Thesepeopledon’tmindpayingareasonablefeeforhighquality.

Highqualitysshouldberewarded.

Thecompanyprovidesarangeofplans,eachwithadifferentsubscriptionprice.Theleastexpensiveplaniscalledthebasicplan.

Thisplanprovidesnon-emergencywithaverylowcharge.

Themostexpensive’splanistheirVIPplan.

TheVIPplanprovidesemergencys24hoursadaywithnoadditionalcharge.

Italsoprovidesrebatesforcustomerswhodon’tcallforanyduringtheyear.

Inaddition,quickservegivesbonuspointstocustomersforeachyeartheysubscribe.Thesebonusescanbeusedtobuynewappliancessuchasstovesandrefrigerators.

Ifthebusinesscontinuestogrow,theownersmaydecidetotakethecompanytopublic.Thismeansthatthepubliccanbuysharesofthecompany.

Itwouldthenchangefromprivate-ownedcompanytoapubliccompany.

Theownersbelievethattheirbusinessissuccessfulandcanexpandaroundworld.

Theyalsobelievethattakingtheircompanypubliccanmakethemrich.

Unit3-2vocabulary

Biologyisstudyoflife,includingitsstructureandevolution.

Biologystudyhowlifesurvivesandreproduces.

Chemistryisthestudyofmatter,includingthestructureofitsatomsandmolecules.Chemistsstudyhowvarioussubstancesinteractwitheachother.

Astronomyisoneoftheoldestsciences.

Astronomersstudythestructureandevolutionoftheuniverse,includingthestudyofstars,planetsandgalaxies.

Geologiesisthestudyofstructureofhistoryoftheearthandotherplanets.

Geologiststudydifferenttypesofrocks,earthquakesanddifferentlayersoftheearth.

Mathematicsisthestudyofnumbers,shapes,patternsandchange.

Mathematicsisusedbyallotherbr