新概念二册53课课件(共38张PPT)

forestfire•Whatmaycausetheforestonfire?•Whatwillbethepossibleresults/effects?•Whatcanbedonetopreventforestfires?Causesofforestfire•Humanreasonisoneofthebiggestfactors•Longdryweather(drought)mayalsocausegroundtemperaturerising,forestmaterialeasycausespontaneouscombustion•lightningcanalsocausefireaforestfirecausedbythedroughtinGuizhouProvinceinMarch5thaforestfirecausedbyhumanactivityinAustraliaaforestfirecausedbylightninginCaliforniaTerribleeffectsofforestfire•Firedestroyedforestcreatures•Theairwillbepolluted,andpeople‘sliveswillbeindanger•Toputouttheforestfirecostalotofhuman,materialandfinancialresourcespreventivemeasurespreventivemeasures•Setup/foundfireorganizations•Nosmokingintheforest•Sourcesmustbestrictlycontrolled•Enhance/strengthentheconsciousnessoffireATrueStoryAbearwentoutofthezootosearchforhischild.Surroundedbysomanypeople,heclimbedtheelectricalpoleoutofpanic(惊慌).Whenhereachedthetopofthepole,hedidn’tknowwhattodo.Hedecidedtogetdown,butunfortunately,hewaskilledfortouchingthewire.Finally,hefellfromthepoleandwasburnedtodeath.Whatwillhappenwhenaneaglethrowsasnakerightaroundanelectricalpoleandelectricalwire?Itwillcatchfire/beonfire!【Newwordsandexpressions】hotadj.带电的，充电的firemann.消防队员causev.引起；n.原因examinev.检查accidentallyadv.意外地，偶然地remainsn.尸体，残骸wiren.电线voltn.伏特（电压单位）powerline电力线solvevt.解决mysteryn.谜（无法接受地,解释不了的）mysteriousadj.snatchv.抓住sparkn.电火花Lesson53HotsnakeWhatcausedthefireinthestory?AnunusualexplanationCarefulreading1.Wheredidthebigforestfirebreakout?2.Hasthefirebeenputout?3.Whathavethefiremenbeentryingtodoeversincethen?4.Whatareforestfiresoftencausedby?5.Didtheyfindanybrokenglassorcigarettes?6.Howdidthefiremandiscoverthecause?7.Whatdidthefiremannotice?8.Whatishisexplanation?9.Doyouthinktheexplanationacceptable?1.ThebigforestfirebrokeoutinCalifornia.2.Yes,ithasbeenputoutatlast.3.Theyhavebeentryingtofindouthowthefirebegan.4.Forestfiresareoftencausedbybrokenglassorbycigaretteendswhichpeoplecarelesslythrowaway.5.No.Thoughthefiremenexaminedthegroundcarefully,theywerenotabletofindany.6.Theydiscoveredthecauseaccidentally/quitebyaccident.偶然地7.Henoticedtheremainsofasnakewhichwaswoundroundtheelectricwiresofa16,000-voltpowerline.8.Abirdhadsnatchedupthesnakeanddroppeditontothewires.Thenthesnakewounditselfroundthewiresandsentsparksdowntotheground,startingafire.9.Theexplanationissimpleandunusual,butacceptableinmyopinion.1.★hotadj.带电的,充电的;热的；新鲜的；棘手的；带电的,充电的hot-hot-hot麻辣烫；hot-wings辣鸡翅；hotdog热狗hot-tempered火暴(脾气)的hotline热线；hottopic热门话题ahotcake畅销,热销=bestseller畅销的东西hotpotato棘手的问题hotnews最热点的新闻2.★firemann.消防队员hydrantn.[ˈhaɪdrənt]消防栓,消防龙头fireextinguisher[ɪkˈstɪŋgwɪʃə]灭火器（extinguishern.熄灭者,灭火器）extinguish＝putoutabigfire灭火3.Havebeendoing5年前我在这家工厂工作过。Iworkedinthefactory5yearsago.你在这家工厂工作过吗？Haveyoueverworkedinthisfactory?我没去过重庆。Ihaven’tbeentoChongqing.我在这家工厂已经工作了15年了。Ihavebeenworkinginthisfactoryfor15years.已经连着下了三个星期的雨了。Ithasbeenrainingonend/continuouslyfor3weeks.4.★lookfor/find/findout•findout（经过研究、努力等）找出，发现，查出……（这里findout的宾语是个从句）•I’lltryandfindoutthenameofthepersonwhosavedmylifeyesterday.科学家们尚未发现生命是如何开始的。Scientistshaven’tfoundouthowlifebegan.5.【SpecialDifficulties】★causev.&n.引起；原因①v.引起causesth./becausedby引起麻烦Pridecausesfailure.骄傲使人失败Theaccidentiscausedbycarelessness.事故由粗心导致causesb.todosth.导致某人做某事Illnesscausedhimtolosehistemper.(loseone’stemper发火)②n.原因，强调事情发生的直接原因(一个)because因为reason理由，其他各种的理由(很多个)Givemeyourreasonsforgoingthere.Whatwasthecauseofthedelay?作“原因”讲时，reason与cause可互换，但reason与介词for连用；而cause则与介词of连用。reason①n.理由，原因reason后面通常跟why引导的从句：Thatwasthereasonwhythemeetingwasputoff.②v.推理，劝导，说服reasonwithsb.劝说(以道理)，理论Howcanyoureasonwithhimwhenheissoworried?【SpecialDifficulties】6.Throwto，ThrowatandThrowawaythrow作及物动词主要含义为“投，掷，抛，扔”。throwto(sb.)扔给（某人）HethrewtheballtomeandIcaughtit.throwat对准某一目标扔Theboythrewastoneatthewindowandbrokeit.throwaway扔掉，丢弃Manypeoplethrowawaycigaretteendscarelessly.7.Sure=certain?Iamsurethat…..Iamquitesurethatthefireiscausedbyahotsnake.Besureofthecauseofthefire.Iamnotsureaboutthat.Sure!/ofcourse!Itissurethat…???8.examine★examinev.检查examinethesoiltakeanexam.参加考试，接受检查checkv.核实,核对ChecktheemailCheckin/out登记入住，结账离开9.★accidentallyadv.意外地,偶然地(但更趋向于“偶然”的意思)=byaccident/chanceunexpectedlyadv.出乎意料地(更趋向于“意外”的意思)10.★windvt.缠绕，卷在……上；盘旋，蜿蜒①vt.缠绕，卷在……上（常与around/round连用）Didyouwindthispieceofwireroundthetree?②vt.蜿蜒，盘旋windone'sway蜿蜒而行11.★power1）电力，动力electricpower电力waterpower水力2）力,能力（自然的体力、智力）Hispowerisfailing.他的体力在衰退。3）权力,支配力,势力politicalpower政治权力notwithinone’spower=beyondone’spower力所不能及我无法理解计算机是如何工作的。Itisbeyondmypowertounderstandhowthecomputerworks.★wiren.金属线，电线telephonewires电话线Electricwires电线wirelessadj.无线的wirelesstelegraph无线电报★voltn.伏特voltagen.电压,伏特数12★solvev.解决solvethemysterysolvetheproblem★snatchv.抓住catchv.抓，如抓鱼holdv.握着snatchv.(突然抓起来)强调动作的突然性seizev.抓住(用力)seizemyarm13.DropandFalldropvi.&vt.（使）掉下，（使）落下，放下（强调的是不小心掉下来）Ashewalkedpastthetree,anappledroppedfromit.Thewaiterdroppedafork.fallvi.落下，（雨、雪）下，降，跌倒，摔倒（强调的是掉下来的概念,动作）Ifellandhurtmyself.Whenleavesfallinautumn,I’llcomeback.translation•AtlastfiremenhaveputoutabigforestfireinCalifor