Unit 3 Reading and Thinking—Comprehending(ppt课件)-2022新人教版（2019）《高中英语》选择性必修第三册.pptx

1、Environmental ProtectionUnit 3英语英语2424字整体教学字整体教学单元主题语境We need to protect the earth because it is our home.我们需要保护地球，因为它是我们的家。我们需要保护地球，因为它是我们的家。人与自然话题导入话题导入Today rainforests are disappearing from the surface of the globe.Despite growing international concern，rainforests continue to be destroyed at a p

2、ace of over 80,000 acres per day.World rainforest cover now stands at around 2.5 million square miles.Human activities have had an effect on much of this remaining area.Deforestation(滥伐森林滥伐森林)of rainforests has a global effect on the disappearance of species and the loss of renewable resources.Most

3、people agree that the problem must be solved，but the means are not as simple as building fences around the remaining rainforests or banning the wood trade.Economic，political，and social pressures will not allow rainforests to continue to exist if they are completely closed off from use and developmen

4、t.So，what should be done to protect rainforests？The solution must be based on what is very practical and depend on developing an approach built on the principle of sustainable use and development of rainforests.Beyond the responsible development of rainforests，efforts to restore damaged forest lands

5、 along with protected areas are the key to securing rainforests for the long-term benefits they can provide for mankind.Historic approaches to rainforest protection have failed，as shown by the increased rate of deforestation.In many regions，closing off forests as untouchable parks and reserves has n

6、either improved the quality of living or economic opportunities for the rural poor，nor stopped forest clearing by illegal woodcutters and developers.The problem with this traditional approach to preserving wildland in developing countries is that it fails to develop proper economic motives for prese

7、rving the forest.Local people and the government itself must see economic returns to prove the costs of maintaining(维持维持)parks from economic activities.靓句运用于写作As scheduled，our team will take part in an important game.(2019全国全国，书面表达，书面表达)The most important thing for me is that I can do something mean

8、ingful.(2019全国全国，书面表达，书面表达)Period OneReading and ThinkingComprehending语篇理解 精读演练 萃取文本精华读前清障 识记单词 快速顺畅阅读内容索引内容索引读 前 清 障识记单词 快速顺畅阅读品句猜词品句猜词请预读下列课文原句，并猜测句中加颜色词汇的意思。请预读下列课文原句，并猜测句中加颜色词汇的意思。1.A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change

9、in the global climate._2.An expert who has studied polar bears for many years said that from the position of its dead body，the bear appeared to have starved and died._3.The heat is released back into space at longer wave lengths._4.Without this process，Earth could not sustain life._融化的融化的挨饿挨饿释放；排放释放

10、；排放维持维持5.Climate scientists have warned that if we do not take appropriate actions，this warming trend will probably continue and there will be a higher price to pay._6.In fact，news reports are frequently broadcast about extreme rainstorms and heatwaves causing deaths and economic losses._ _返 回趋势；趋向趋

11、势；趋向频繁地，经常频繁地，经常 广播广播语 篇 理 解精读演练 萃取文本精华Step 1Fast-reading1.What does the passage mainly tell us?A.Some polar bears died of starvation.B.What the greenhouse effect is.C.How the polar bears find food.D.Global warming has caused some disasters and we must pay attention to it.2.Read the passage and matc

12、h the main idea with each paragraph.Para.1A.We need to do something to reduce greenhouse gas emissions.Para.2B.The rise in temperature has caused natural disasters.Para.3C.Earth is getting warmer and warmer.Para.4 D.A dead polar bear was found，which alarmed some experts.Para.5E.Why is Earth getting

13、warmer and warmer?Step 2Careful-readingRead the passage carefully and choose the best answer.1.From the second paragraph we can learn that .A.all the polar bears have died of starvationB.the expert knows nothing about the polar bearC.the polar bear couldnt find enough food because of climate changeD

14、.the polar bear liked travelling long distances2.According to the passage，help(s)Earth sustain life.A.the natural greenhouse effectB.the man-made greenhouse effectC.the carbon dioxide released into the atmosphereD.greenhouse gases produced by people3.Which of the following statements is TRUE accordi

15、ng to the passage?A.According to climate scientists，the warming trend will stop.B.Extreme weather results from the rise in temperature.C.People should burn more fossil fuels.D.It is the governments responsibility to reduce greenhouse gas emissions.4.We can learn from the passage that .A.it doesnt ma

16、tter whether we pay attention to global warming or notB.heat from the sun keeps Earth habitableC.the rise in temperature doesnt affect peoples lifeD.the rise in temperature only affects some animalsStep 3Post-readingAfter reading the passage，please fill in the following blanks.There is little doubt

17、that Earth is getting warmer and warmer.In 2013，many people 1.(shock)by a news photo of a dead polar bear which appeared to have starved and died.Experts claimed that low sea-ice levels 2.(cause)by climate change meant the bear could not hunt seals as before，so it had to travel greater distance 3.(f

18、ind)food.Then what is causing the increase in the global average surface temperature？Climate scientists often mention a key climate process called the“greenhouse effect”，were shockedcausedto find4.has two common meanings:the“natural”greenhouse effect and the“man-made”greenhouse effect.The“man-made”g

19、reenhouse effect has now become 5.big problem.There is strong and comprehensive evidence 6.the rise in temperature has led to an increase in extreme weather and natural disasters worldwide.In fact，news reports are 7.(frequent)broadcast about extreme rainstorms and heatwaves 8.(cause)deaths and econo

20、mic losses.Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate.This requires the attention of people all over the world.We as individuals can reduce our“carbon footprint”by 9.(restrict)the amount of carbon dioxide our lifestyles produce.It

21、 is our responsibility 10.(seize)every opportunity to educate everyone about global warming.whichathatfrequentlycausingrestrictingto seizeStep 4Sentence-learning1.Experts claimed that low sea-ice levels caused by climate change meant the bear could not hunt seals as before，so it had to travel greate

22、r distances in order to find food.句式分析句式分析该句为复合句。该句为复合句。Experts claimed 是是 ；that引导宾语从句，引导宾语从句，作作claimed的宾语；该宾语从句中的的宾语；该宾语从句中的the bear could not hunt seals as before也也是宾语从句，作是宾语从句，作meant的宾语；的宾语；caused by climate change是过去分词是过去分词作作_ ，修饰修饰low sea-ice levels；so连接的连接的是是 。自主翻译自主翻译_ 专家专家称，气候变化导致的海冰降低意味着北极熊

23、不能像以前称，气候变化导致的海冰降低意味着北极熊不能像以前那样猎取海豹了，所以它不得不走更远的距离去寻找食物。那样猎取海豹了，所以它不得不走更远的距离去寻找食物。主句主句后置后置定语定语并列句并列句2.There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide，not only causing serious damage，but also costing huma

24、n lives.句式分析句式分析该句为复合句。该句为复合句。There is strong and comprehensive evidence是是 ；that引导引导 从句从句；not only.but also.不但不但而且而且，在此处连接两个现在分词，在此处连接两个现在分词作作 。自主翻译自主翻译_主句主句同位语同位语结果状语结果状语 有有充分和详尽的证据表明：气温的上升导致了全球范围内充分和详尽的证据表明：气温的上升导致了全球范围内极端天气和自然灾害的增加，不但造成了严重的破坏，而且还损害了极端天气和自然灾害的增加，不但造成了严重的破坏，而且还损害了很多人的生命。很多人的生命。3.Cl

25、imate scientists have warned that if we do not take appropriate actions，this warming trend will probably continue and there will be a higher price to pay.句式分析句式分析此句是复合句。此句是复合句。Climate scientists have warned是是 ；that引导引导 从句从句；if引导引导 。自主翻译自主翻译_ 气候气候专家警告说，如果我们不采取适当的行动，这种变暖专家警告说，如果我们不采取适当的行动，这种变暖趋势可能会继续下

26、去，并付出更高的代价。趋势可能会继续下去，并付出更高的代价。主句主句条件状语从句条件状语从句宾语宾语4.It is our responsibility to seize every opportunity to educate everyone about global warming，along with its causes and impacts，because this is the most serious issue affecting all of us on this planet.句式分析句式分析此句是复合句。此句是复合句。because引导引导 从句从句；it是是 ，真正的主语是真正的主语是to seize every opportunity.；affecting all of us on this planet是现在分词是现在分词作作 ，修饰修饰issue。自主翻译自主翻译_返 回 抓住抓住每个机会来教育大家了解全球变暖及其原因和影响的每个机会来教育大家了解全球变暖及其原因和影响的知识是我们的责任，因为这是影响地球上所有人的最严重的问题。知识是我们的责任，因为这是影响地球上所有人的最严重的问题。原因状语原因状语形式主语形式主语后置定语后置定语ThanksThanks