浙江省安吉县振民中学高二英语 Unit4 Reading 课件.ppt

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1、人教课标版人教课标版人教课标版人教课标版 高二选修高二选修高二选修高二选修6 6Unit 4Unit 4英英 语 课 件件2021/8/8 星期日1Reading 2021/8/8 星期日2What is the greenhouse made and used for?2021/8/8 星期日32021/8/8 星期日42021/8/8 星期日5 A greenhouse is made of glass and is used for growing plants,especially during cold weather.2021/8/8 星期日6How does it work?Th

2、e air inside is warm because the glass traps the heat from the sun and keeps it from escaping.This makes the greenhouse heat up and so the plants can grow throughout the cold period.2021/8/8 星期日7What are the“greenhouse gases”?In the atmosphere surrounding the earth there are gases,which are called“g

3、reenhouse gases”,including carbon dioxide,methane(甲烷甲烷,沼气沼气)and water vapor.2021/8/8 星期日8What do you think greenhouse gases do?They trap heat from the sun and therefore warm the earth.2021/8/8 星期日9Main ideas of each partWriting techniques(Paragraph 1)Introduce a debate over the issue of global warmi

4、ng.Raising a questionSkimming 2021/8/8 星期日10Main ideas of each partWriting techniques(Paragraphs 2-3)Illustrate how global warming comes about.Giving examples,using graphs,explanation.2021/8/8 星期日11(Paragraphs 4-5)List two different attitudes among scientists towards global warming.Giving examples,m

5、aking contrast.2021/8/8 星期日12(Paragraph 6)Its up to readers to think and decide whether people should do something about global warming or not.Using a question,leaving readers to think over the issue.2021/8/8 星期日13Read the text carefully and fill in the blanks.Scientists OpinionJanice Foster We need

6、 1_ like carbon dioxide,methane and water vapour,but if we add huge 2_ extra carbon dioxide to the atmosphere by burning fossil fuels,it will cause the 3_ to go up.gasesquantities ofglobal temperature2021/8/8 星期日14Scientists OpinionJanice Foster Over the next 100 years the amount of warming could be

7、 as low as 1 to 1.5 degrees Celsius,but it could be as high as 5 degrees Celsius.An increase of five degrees would be a 4_.catastrophe2021/8/8 星期日15Scientists OpinionsGeorge Hambley Believes that we shouldnt worry about 5_ of carbon dioxide in the air.Predicts that any warming will be mild with few

8、bad environmental 6_.7_ that more carbon dioxide is actually a 8_ thing,which will make life for human beings better.high levels consequencesStatespositive2021/8/8 星期日16Choose the best answers according to the text.1.Which of the following is TRUE according to the text?A.The temperature of the earth

9、 increased about one degree Fahrenheit during the 20th century.B.The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997.C.All scientists accept the data in graph 2 except Charles Keeling.D.Janice Foster says that more carbon dioxide will make plants grow faster.A20

10、21/8/8 星期日172.Which of the following is Dr Janice Fosters opinion?A.The result of the temperature increase will be serious.B.The amount of warming is nothing serious.C.We neednt worry about high levels of carbon dioxide.D.Global warming is a natural phenomenon.A2021/8/8 星期日182021/8/8 星期日199、静夜四无邻，荒居

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