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2017屆浙江高三二輪復(fù)習(xí)---高考概要寫作指導(dǎo)教學(xué)課件 (共32張PPT)

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2017屆浙江高三二輪復(fù)習(xí)---高考概要寫作指導(dǎo)教學(xué)課件 (共32張PPT)

閱讀下面短文,根據(jù)其內(nèi)容寫一篇6 0詞左右的內(nèi)容概要。Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2 0 5 0 , food shocks could occur about once every 3 0 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.” 3 . add some transitional words to make the passage smooth. 1 . Find out key information of each para. 2 . Rewrite the key information Express the same meaning using your own words , phrases or structures.Concise ! 6 0 -7 0 words Step 1 : Careful reading for the key words, phrases or sentences in each paragraph Underline or circle the key informationPara. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. Para. 2 : Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest. Para. 2 : Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest. Para. 2 : Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest. Para. 3 : Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2 0 5 0 , food shocks could occur about once every 3 0 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime. Para. 3 : Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2 0 5 0 , food shocks could occur about once every 3 0 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime. Para. 3 : Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2 0 5 0 , food shocks could occur about once every 3 0 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime. Para. 4 : So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.” Para. 4 : So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.” Para. 4 : So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.” Step 2 : Rewrite the key information in our own words Tip 1 : Rewrite at the sentence level Tip 2 : Rewrite at the word level Para. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger._ (change the compound sentence并列句 into one simple sentence簡(jiǎn)單句 )_ (change the subject) Feeding the worlds population is a challenge._ is a bigger and bigger challenge to feed the worlds population. bigger andbiggerIt _ (change the word “worlds”)_ (change the phrase “a bigger and bigger challenge”) Para. 1 : It is a bigger and bigger challenge to feed the worlds population.It is a bigger and bigger challenge to feed theglobal population.It is _ _ _ _ to feed theglobal population. challenging more and more Para. 1 : It is more and more challenging to feed the _ global population. (add an adjective)Para. 1 : Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7 .3 billion people share the planet. By 2 0 5 0 , some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.increasinggrowing Para. 2 : crops, breadbaskets, These areas often occupy a relatively small portion of the globe._ (simplify the sentence)_ (use “many crops” as the subject) Breadbaskets are often _.Many crops _ _ _ on _ breadbaskets. limitedare often grown limited Para. 2 : The breadbaskets are easily affected by bad weather._ (change the word “affect”) Breadbaskets are easily _ /_by bad weather.Many crops are often grown on limited breadbaskets. (combine the two sentences)2 Many crops are often grown on limitedbreadbaskets _ are easily impacted by bad weather.that/ whichinfluenced impacted Para. 3 : big crop failures, could lead to, a “food shock” That means an overall shortage of food would occur._ (put the key phrases into one sentence)_ (combine the two sentences) Big crop failures could lead to a “food shock”.Big crop failures could lead to a “food shock” _ means an overall shortage of food.that/whichBig crop failures could lead to an overall shortage of food, a “food shock”.called Para. 3 :Big crop failures could lead to an overall shortage of food, called a “food shock”._ (change the phrase “l(fā)ead to”)Big crop failures could cause an overall shortageof food, called a “food shock”.result in /contribute toaccount for/ Para. 3 : Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2 0 5 0 , food shocks could occur about once every 3 0 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.Para. 3 :Food shocks could occur more _in the future. (use one adverb)frequently/often Para. 3 :Big crop failures could cause an overall shortageof food, called a “food shock”.Food shocks could occur more frequently in the future. (combine the two sentences)Big crop failures could cause an overall shortage of food, called a “food shock”, _ could occur more frequently in the future. which Para. 4 :Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. _ (change the subject of the second sentence)Cutting down on food waste is one of the most effective ways to fight against food shocks.(change the phrase “cut down on”) Reducing food waste Para. 4 :Making agriculture efficient is one choice.Reducing food waste is one of the most effective ways to fight against food shocks. So what can people do to help avoid food shocks? People can avoid food shocks by _ _ and _ _ _.makingagriculture efficient reducing food waste Para. 4People can avoid food shocks by making agriculture efficient and reducing food waste._ (change the active voice into passive voice) (change the word “avoid”)Food shocks can be avoided by making agriculture efficient and reducing food waste.prevented Step 3 : add some transitional words to make the passage smooth.It is more and more challenging to feed the growing global population. _ many crops are often grown on limited breadbaskets which are easily impacted by bad weather. _ big crop failures could cause an overall shortage of food, called a “food shock”, which could occur more frequently in the future. _ food shocks can be prevented by making agriculture efficient and reducing food waste.xuejunenglish1 6 3 .comxuejun1 2 3 4 5 6 For one thing, For another, One r ason is that Another reason is that However, It is more and more challenging to feed the growing global population. For one thing, many crops are often grown on limited breadbaskets which are easily impacted by bad weather. For another, big crop failures could cause an overall shortage of food, called a “food shock”, which could occur more frequently in the future. However, food shocks can be prevented by making agriculture efficient and reducing food waste. (6 8 words)

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