高中英语 Module4 Section Ⅰ Ⅰntroduction ＆ Reading Pre reading课件 外研版必修3.ppt

module4 section step1 step2 step3 step4 step5 1 haveyouevenbeencaughtinasandstorm whatdoyouthinkisthebestwaytopreventasandstorm 2 doyouknowabouttheduststorm doyouknowwhatdamageaduststormmaycause duststormsdon tjusthappeninthemiddleofthedesert theyhappeninanydryareawhereloosedirtcanbeeasilypickedup grainsofsandthrownintotheairbythewindusuallyfallbackdowntothegroundafterafewhours smallerbitsofparticles 颗粒 stayintheairforaweekorlongerandcanbeblownthousandsofmilesaway dustfromthesaharadesertisalwaysblownacrosstheatlantic causingbrightredsunrisesandsunsetsinmiami thedustdoesn tstopthere itkeepstravelingasfarasthecaribbeanandtheamazonbasin aduststormisastrong violentwindthatcarriesfineparticleslikeclay dustandothermaterialsforlongdistances thefineparticlesdancearoundintheairduringthestorm thescarythingaboutaduststormisthattheycanspreadoverhundredsofmilesandriseover10 000feet 305meters wellovertheheightofatelephonepole theyalsohavewindspeedsofatleast25milesperhour 40kilometers whichmaybenotstrongenoughtoblowthefeathersoffachickenbutstillsomethingworthavoiding don tbesurprisedifyousuddenlyseeaduststormheadingyourway duststormsusuallyarrivewithoutwarning thedustisblinding makingdrivingimpossible oftentheyonlylastforafewminutesbutstormsusuallyleaveseriouscaraccidentsbehind ifyou reinacarduringaduststorm remindthedrivertopullovertothesideoftheroadandturnofftheheadlights neverstopinthemiddleoftheroad duringthe1960stherewereeightduststormsthatcausedsomeseriousdamage recentlyaustraliawashavingproblemswithduststorms researcherssaidthestormscostaustraliaabout20milliondollarsayearinmedicalbillsbecauseofdiseasescausedbyduststorms inmildduststormsit sstillpossibletowalkaroundalthoughyouwouldn twantto thewindcarryingthedustwillleavethingslookingliketheywerejusthitbyatornado thebestthingtodoisfindsafecoverinabuildingorstayinyourcar whenlookingatthefollowingpictures whatmayoccurinyourmind sandstormsofcourse doyouknowtheharmfuleffectsofsandstorms asfarasiknow sandstormscan 参考答案 killpeopleandanimals pulldownbuildingsandcausepoorharvests pollutetheatmosphereandcarryawaytopsoil thebreakingoutofsandstormsbringsmoresolidpollutionsintotheatmosphereanddamagestheenvironmentandsoilintheattackedareas thusaffectingtheagricultureformanyyears doyouknowhowmanykindsofbehaviorsareunfriendlytotheenvironment 参考答案 cuttingdownthetrees usingplasticbags pouringwastewaterintoriversandoceans givingoutpoisonouswastegases scanthepassageandmatcheachparagraphwithitsmainidea para 1a sandstormssometimesaffectbeijing para 2b sandstormsdoalotofdamagetopeople para 3c thegovernmentplantstreestopreventsandstorms para 4d sandstormshavebeenamajordisasterformanyasiancountriesforcenturies para 5e sandstormsinasia para 6f sandstormsinchinaappeartohaveincreased 答案 para 1 para 6defabc choosethebestansweraccordingtothepassage 1 whensandstormshappen whatwillyouwearifyougoout a ahat b acoat c amask d atie 2 howmanykilometresisthedesertawaytothewestofbeijing a 350 b 250 c 150 d 200 3 whichstatementiswrong a peoplesometimescan tforecastthestrengthofastorm b thegovernmentplanstocontinueplantingtreesforthenexttenyears c northwestchinaispartofthesandstormcenterincentralasia d sandstormssometimesaffectbeijing 4 accordingtothetext wecanlearnthatsandstorms a causepeopletobuymoremasksb aredifficulttodealwithc arenotdangerousbutfrighteningd willdisappearwithinfiveyears 5 whichofthefollowingistrueaccordingtothetext a renjianbothoughthewouldprobablydiefromthesandstorm b asandstormcanbeforecastseveralmonthsbeforeitarrives c huangxiaomeifrequentlycyclesinsandstorms d sandstormsoccurinbeijingmainlybecauseofitsdryclimate 答案 1 c2 b3 b4 b5 a fillintheblanksaccordingtothepassage strong dry sanddunes northamerica desertareas climatechanges orange beijing masscampaign 30billion five fillinblanksaccordingtothepassage sandstormshavebeenamajordisasterformanyasiancountriesforcenturies scientistshavetriedmanywaysto1 thisproblemandinchina amass2 hasbeenstartedtohelpsolveit sandstormsarestrong drywindsthatcarrysand theyareoften3 thickthatyoucan tseethesun andthewindissometimesstrong4 tomovesanddunes solve campaign enough so northwestchinaispartofthesandstorm5 incentralasia sandstormsbeginindesertareas sandstormssometimes6 beijing citizenswakeuptoanorangeskyandstrongwindsthat7 thecityinathick brown yellowdust thechinesecentralweatherstationcan8 asandstormsomeweeksbeforeitarrivesinbeijing butthe9 ofthestormsometimessurprisespeople centre affect cover forecast strength thedesertisonly250kilometresawaytothewestofbeijing inorderto10 itcomingnearer thegovernmenthasplantedmoreth