懂你英语L3 Unit 3Word文档下载推荐.docx

懂你英语L3 Unit 3Word文档下载推荐.docx

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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.

Reptilesarecoveredbys,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.