英语：unit22-lesson3-natural-disasters课件(北师大版选修8)

英语：英语：unit22-lesson3-unit22-lesson3-natural-disastersnatural-disasters课件课件(北师大版选修北师大版选修8)8)Look at the following pictures Look at the following pictures and what are happening in the and what are happening in the pictures?pictures?earthquakesdroughts tsunami floods volcanic eruptions hurricanes forest fires typhoonlandslides What do you think causes the disasters,people or nature?Discussion unnaturalRead the text again and answer these questions:1.What is the attitude of the journalist towards the future?Pessimistic.2.Who are most likely to be the victims of natural disasters?Poor people.3.Why are there now more hurricanes,floods and droughts?Overpopulation and mismanagement of the worlds resources.4.Why are volcanoes and earthquakes more dangerous now?Because half the worlds population lives in cities within range of volcanic eruptions and earthquakes.5.What could be the biggest threat to the planet in the future?A volcanic eruption.6.What effects might this threat have?It might plunge the planet into winter for years.Fill in the blanks about the text.In the last _ years,there are more and more disasters such as _,_,windstorms,earthquakes,_,volcanic _and _ fires all over the world.Why are so many disasters?One of the reasons is over-_.ten floodsdroughtstyphoons eruptions forest population_ addition,_ change and the spectre of global _ caused by the mismanagement of the worlds resources can lead to the disasters or make them worse.Inclimate warmingAt present,volcanoes and earthquakes are more _ with the fast _ of people.Earthquakes take the lives of 1.6 millionPeople in the last hundred years.What is worse,the disaster professionals predict that the things will get _.dangerous growthworse Language Points Language Points Important phrases1.on record 2.result in 3.wipe out 4.turn on5.at the rate of 6.quantities of7.for instance 记载下来的，有记录的记载下来的，有记录的产生。结果，导致产生。结果，导致 区别于区别于 result from消除，毁灭消除，毁灭打开，攻击，袭击打开，攻击，袭击以以速度速度 at the speed of大量大量 a quantity of for example 8.within the range of 9.at risk10.in some degree11.plunge into12.on top of 在在范围内范围内有危险，冒险有危险，冒险在某种程度上说在某种程度上说使陷入，遭受。使陷入，遭受。in additionWith 的复合结构的复合结构:with+n./pron.+adj./adv./prep phrases/n/doing/done/to do with+object+object complement With 的复合结构在句子中可以做的复合结构在句子中可以做伴随伴随状语状语,也可以做也可以做原因状语原因状语和和后置定语后置定语 e.g.He walked along with his head down/with his face red He is waiting for you with a magazine in his hand.With you monitor in my class,I will be in charge of the class easily.With nothing to do,I will go to the cinema.With his work finished,he went back home.He lay there,with his eyes looking at the sky.Who lives in the room with the light on?(1)他站在那里他站在那里,手被帮在一棵树上。手被帮在一棵树上。He stood there,with his hands tied to a tree.(2)他头高昂着走了进来他头高昂着走了进来.He came in with his head high.wipe out:(1)get rid of/remove:清除清除,除去除去e.g.Wipe out these unhappy things between you and her.(2)destroy completely:毁灭毁灭,消灭消灭e.g.At last,the army led by Mao Zedong wiped out the enemies.A disease almost wiped out the population of the island.risk:vt./n.冒险冒险e.g.You are to take risks to get what you want,but you must not risk your life!at risk 处于危险之中处于危险之中,作表语或者状语作表语或者状语at/take/run the risk of 冒冒的危险的危险He saved my life at the risk of losing his own.They were ready to run/take the risk of being taken prisoner by the enemy.risk it:冒风险试试冒风险试试 I dont dare to risk it,its too dangerous.plunge:vt./vi.投入投入(某物某物)使陷入使陷入;突入突入 Dont plunge your hand into cold water.What plunged the country into the war?result in:have as a consequence 造成造成的结果的结果,导致导致e.g.It is their carelessness that resulted in the accident.result from 是由。造成的是由。造成的 e.g.It all resulted from jealousy.1.After the storm they had to _.2.Many people in the developing world suffer from diseases because they are _.3.Our team was knocked out in the _ of the competition.rebuild undernourishedsemi-final Exercise 6Complete the sentences with words from the above exercise in a suitable form.4.The bomb was about to go off but the experts managed to _it.5.I _ the question and failed the exam.6.I _ yesterday and arrived an hour late for class.defusemisunderstood overslept 7.A lot of houses collapsed in the earthquake because of _ construction.8.Floods are not _ these days;they happen more and more often.sub-standardunusual