人教版高一英语上册必修一第四单元unit4 warming up 课件.ppt

WarmingupandPre-Reading,ABrainstormingMap:Whichdisasterdoyouknow?,NaturalDisasters,fire,earthquake,tsunami,typhoon(hurricane),drought,dragoncyclone龙卷风,volcanoeruption,landslide山体滑坡,flood,mud-rockflow泥石流,sandstorm,NaturalDisasters,hurricane,flood,drought,Typhoon,fire,sandstorm,Earthquake,Whichdisastermaycausetheworstdamage?,Discussion:Whatdamagewillanearthquakecause?,Roadsgethugecracks.,Steamburstsfromholesorwellsintheground.Waterpipesaredestroyed.,Housesfalldown.Brickbuildingsaredestroyed.,Damsandbridgesfalldown.Hardhillsofrockbecomeriversofdirt.,Therailwaytracksbecomeuselesspiecesofsteel.,Peopledieorareinjured.Familiesarekilledandmanychildrenareleftwithoutparents.,Inafewseconds,alargecityliesinruins.Everythingisdestroyed.Itseemstheworldwasatanend.,Compareing,Before,After,Tangshanisabeautifulcitywithgardens,wideroads.,SanFranciscoisacitywithtallbuildingsthicklystandingontheearth.,Thesetwocitiesarefamousfortheirearthquakesduringaperiodofcalm.Sooneshouldnottrustsituationsthatseempeacefulsincebadthingsmayhappen.,Tangshan,SanFrancisco,Saysomethingaboutthesetwocities.Whatwillhappenbeforeanearthquake?,Warmingup,1906年4月18日早上5时15分，一场强度为里氏8.3级的大地震袭击了旧金山。这场大地震仅仅持续了75秒钟，之后的旧金山几乎一片瓦砾，更加可怕的是，地震过后不久一场大火燃起，使震后的旧金山雪上加霜。,Imagineyourhomebeginstoshakeandyoumustleaveitrightaway.Youhavetimetotakeonlyonething.Whatwillyoutake?Why?,Iwanttotakemoney,books,food,water,clothe,Because,Pre-reading,Whatdoyouthinkmayhappenbeforeanearthquake?,Peoplecanseebrightlightsinthesky.Thesoundofplanescanbeheardoutsideevenwhennoplanesareinthesky.,Micewillrunoutofthefieldslookingforplacestohide.Fishwilljumpoutofthebowlsorponds.,Animalswillbetoonervoustoeat.,Farmerswiveswillnoticethatthewellwallshavedeepcracksinthem.Smellygascameoutofthecrack.Thewellwaterwillriseandfall,riseandfallforafewdays