【学习目标】
（1）掌握skimming和scanning两种阅读方法
（2）通过学习，掌握和运用课文中的7种句型句式
【重点难点】
What are the effect of global warming?
【学习内容】
一．Fast reading:
Part 1:Divide the passage into four parts and write down the main idea of each part?
Paragraph ________: The background of this article.
Paragraph ________: Explanation about how global warming comes about.
Paragraph ________: Two different attitudes among scientists towards global warming.
Paragraph ________: Two choices of dealing with this problem.
