3.1 unit 3 reading and thinking-高二英语同步精品课件+课后习题（人教版2019选择性必修第三册)

Unit 3 Environmental Protection Period 1 Reading and Thinking 1.To discuss the problem of climate change. 2.To learn to identify the style of this text and infer the writer’s purpose. 3.To think about how we can do to deal with climate change. Step 1. Lead-in The temperature of the global surface rose about 1.2 ℃ from 1920 to 2016. The earth is becoming warmer and warmer. What effects may be caused by the global warming? 1.Look at the graph below.What information can you get from it? drought flood melting ice Sea-level rise What can you see in the photo? What might be the story behind it? Step 2.Fast-reading 1.What type of writing is this passage? A. Argumentative writing（议论文） B. Narrative writing（记叙文） C. Expository writing（说明文） D. Advertising writing（广告） 2.What’s the passage mainly about? 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. C.Earth is getti