Unit3 正文学案-高中英语人教版（2019）选择性必修第三册.docx

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1、高二英语 XB3Unit3 正文学案 Genius is the ability to endless work hard. 天才就是无止境刻苦勤奋的能力。编辑：使用日期： 高二 XB3Unit3正文学案校对： 审核： 一、 学习目标。1. To enhance the reading and writing skills;2. To figure out the structure and the language features of the text.;二、读文章,梳理知识点。CLIMATE CHANGE REQUIRES THE WORLDS ATTENTION气候变化需要全世界的关

2、注We have known about climate change for decades.（1）There is little doubt that Earth is getting warmer and warmer (see the graph).A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.我们了解气候变化已有几十年了。毫无疑问，地球正变得越来越暖海洋和大气变

3、暖，冰川融化，海平面上升提供全球气候急剧变化的证据。（1） 本句是复合句，that 引导同位语从句In 2013, a lot of people were shocked by a news photo of a dead polar bear （2）that was found on Norways Arctic island of Svalbard.According to the scientists who found its dead body, all that remained of the polar bear was“skin and bones”. An expert w

4、ho has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died. Experts claimed that low sea-ice levels （3）caused by climate change meant the bear could not hunt seals as before,so it had to travel greater distances in order to find

5、 food.This alarming case showed how the increase in temperature had an impact on Earths ecology.2013年，很多人都被挪威北极斯瓦尔巴特岛发现的一只北极熊尸体的新闻照片震惊了。据发现它尸体的科学家说，北极熊只剩下“皮包骨头”。一位研究北极熊多年的专家说，从它的尸体位置来看，这只熊似乎是饿死了。专家称，气候变化导致的海冰水平降低意味着北极熊不能像以前那样捕食海豹，因此它必须跋涉更远的距离来寻找食物。这个令人震惊的例子显示了温度的上升对地球生态的影响。（2） 定语从句（3） 过去分词作定语Then wh

6、at is causing the increase in the global average surface temperature?Climate scientists often mention a key climate process （4）called the“qreenhouse effect, （5）which has two common meanings:the“natural”greenhouse effect and the“manmade”greenhouse effect.The“natural”greenhouse effect refers to the fa

7、ct t（6）hat heat from the sun enters the atmosphere and warms Earths surface as short-wave radiation.The heat is released back into space at longer wave lengths. Greenhouse gases in the atmosphere such as methane and carbon dioxide trap some of the heat, （7）keeping Earths climate warm and habitable.

8、Without this process, Earth could not sustain life.However, the“man-made”greenhouse effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earths surface temperature to rise qui

9、ckly.那么是什么导致了全球平均地表温度的上升呢?气候科学家经常提到一个叫做“温室效应”的关键气候过程，它有两个共同的含义:“自然”温室效应和“人为”温室效应。“自然”温室效应指的是太阳的热量进入大气层，以短波辐射的形式使地球表面变暖。热量以更长的波长释放回太空。大气中的温室气体，如甲烷和二氧化碳，捕获了一些热量，使地球气候温暖宜居。没有这一过程，地球就无法维持生命。然而，“人为的”温室效应现在已经成为一个大问题。当人们通过燃烧化石燃料产生大量额外的温室气体时，更多的热能被困在大气中，导致地球表面温度迅速上升。（4） 过去分词做定语（5） 非限制性定语从句，且是复合句（6） 引导同位语从句（

10、7） 现在分词做结果状语，warm and habitable 形容词做宾补（8）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 human lives. Climate scientists have warned that if we do not t

11、ake appropriate actions,this warming trend will probably continue and there will be a higher price to pay.In fact news reports are frequently broadcast about extreme rainstorms and heatwaves （9）causing deaths and economic losses.有力和全面的证据表明，气温上升已导致全球极端天气和自然灾害的增加，不仅造成严重的破坏，而且夺去了人的生命。气候科学家警告说，如果我们不采取适当

12、的行动，这种变暖趋势可能会继续下去，并将付出更高的代价。事实上，关于极端暴雨和热浪造成死亡和经济损失的新闻报道经常被广播。（8） 整句是复合句，There is strong and comprehensive evidence是主句，that 引导同位语从句，not only causing serious damage, but also costing human lives是现在分词作结果状语（9） 后置定语Continued greenhouse gas emissions will result in further warming and long-lasting changes

13、 to the global climate.This requires the attention of people all over the world.Governments need （10）to consider making policies and taking appropriate actions and measures （11）to reduce greenhouse gas emissions.We as individuals can also reduce our“carbon footprint”by restricting the amount of carb

14、on dioxide our lifestyles produce.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. So what will you do to help?持续的温室气体排放将导致全球气候进一步变暖和持久的变化。这需要全世界人民的关注。政府需要考虑制定政策，采取适当的行动和措施来减少温室气体排放。作为个人，我们也可以通过限制生活方式产生的二氧化碳量来减少我们的“碳足迹”。我们有责任抓住每一个机会，教育每个人关于全球变暖，以及它的原因和影响，因为这是影响我们在这个星球上所有人的最严重的问题，那么你会做些什么来帮助?（10） 作宾语（11） 目的状语3学科网（北京）股份有限公司