module 1 deep south period one introductionreading and vocabulary 课件

《module 1 deep south period one introductionreading and vocabulary 课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、PolaricemeltdownSomescientistswarnthaticeneartheEarth'sPolesmayindeedbemelting.This“polarmeltdown”maybethefirstsignthattheEarthisheatingup.Wecouldbeinveryserioustroubleifthistrendcontinues.①Itisestimatedthatameltdownofaslittleas10percentofModule1DeepSouthPer

2、iodOneIntroduction,ReadingandVocabulary课件Antarctica‘sicewouldraisesealevelsaroundtheglobeby4to9meters.Floodswouldcoverlow-lyingregionsandturncoastalcitieslikeNewYorkandNewOrleansintoreallifeunderwaterworld.Scientistsfirstpredictedinthe1970sthatheattrappedint

3、heEarth'satmospherecouldcauseapolarmeltdown.Manypeoplenowbelievethathumanactivitiesareturninguptheheat.Whenweburnfossilfuelslikecoalandoil，weaddcarbondioxide(CO2)gastotheEarth'satmosphere.CuttingdowntreesalsomakesCO2levelsrisebecausetreesnormallysoakupCO2tom

4、akefood.ScientistssayhigherCO2levelsstrengthenthe“greenhouseeffect”andcouldincreasetheEarth'stemperature.②Infact，CO2levelshaverisenby30percentsincetheIndustrialRevolutionofthe18thand19thcenturies.Overthepastthreeyears，satellitemeasurementshaveshownasealevelr

5、iseofaboutaquarterinchworldwide.③“Ifnothingisdonetoreducefossilfuelpollutionandglobalwarming，sealevelswillriseevenmore.”saysgeologistRichardAlley.ButevenAlleyadmitsthatapolarmeltdownwouldtaketime.TheiceinAntarcticaandArcticlocksupnearlyninetimesthevolumeofwa

6、tercontainedinalltheworld'sriversandlakes.Thesearesuchbig“icecubes”anditwouldprobablytakethousandsofyearstomeltthem.AnotherscientistCharlesBentleydoesn'tthinkameltdownwillhappenatall.“Evenifwarmertemperaturesbegintomeltpolarice，”hesays，“theexcessmoisturewoul

7、dmostlikelyberedepositedassnow.”Inotherwords，themeltedicewouldevaporateintotheatmosphere，refreeze，andfallasrainandsnowoverthePoles.①这次会议预计要开4天。Itisestimatedthatthemeetingwilllastfourdays.②产量比去年至少提高了20%。Theoutputhasrisenbynolessthan20percentoverthelastyear.③如

8、果明天天好，我们将外出。Ifitisfinetomorrow，wewillgoouting.1．佳句仿写一二三Inotherwords，themeltedicewouldevaporateintotheatmosphere，refreeze，andfallasrainandsnowoverthePoles.换句话说，融化的冰将会蒸发到大气中，再凝固，然后以雨或雪降落到极地。2．翻译佳句