高二英语导学案 unit 4 Global warming 一 课前自主预习 篇章结构( 阅读 P26－27的 Reading 部分，完成下列表格)During the 20th century the temperature of the earth rose about 1. degree Fahrenheit.The burning of 2. like coal ， natural gas and oil to produce energy.The levels of carbon dioxide have3 ． greatly over the last 100 to 150 years.Charles Keeling found that the carbon dioxide in the atmosphere went up from around 4. parts to around 370 parts per million between 1957 and 1997.Dr Janice Foster says that the amount of warming could be as low as 1 to 1.5 degrees Celsius，but it could be as high as 5 degrees over the next 5. years.The climate could be very seriousA rise of several metres in the 6. ．Severe storms，floods，7． ，famines.The spread of diseases.The disappearance of 8. ．We should not worry about high levels of carbon dioxide in the air.It will make plants grow 9. ； crops will produce 10. ； it will encourage a greater range of animals.二 要点精讲1．come about 发生；造成So how has this come about and does it matter？(教材 P26)那么，它是怎么产生的呢？会产生什么影响呢？He told me how the accident came about. 他告诉我那事故是怎样发生的。The car accident was horrible，but nobody knows how it came about.那次车祸真可怕，但是没有人知道它是怎么造成的。come into being 开始存在；形成 come across 被理解；(偶然)遇见，碰到come out 出现；出版；结果是；开放 come up 走近；长出；长芽；被提出；(问题或困难)出现come up with 提出；提供；赶上 come to 共计；谈到；涉及；苏醒过来【提示】 come about 是不及物动词短语，不能用于被动语态，常指情况不受人控制的突然发生。有时用 it作形式主语，that 从句作真正主语。用 come 相关短语的适当形式填空① ！We don't have much time.②When is her new novel ？③The subject in conversation yesterday.④How did this situat...
