Unit 4 Reading and Thinking公开课课件 【新教材】2020-2021学年人教版（2019）高中英语必修第三册

Unit 4 Space：The final frontier Unit 4 Space Exploration Reading and thinking To read about the development and value of space exploration. Learn some useful expressions in the text. 1 Can you name any other famous astronauts from China or abroad? Yang Liwei 杨利伟 Jing Haipeng 景海鹏 Nie Haisheng 聂海胜 Liu Yang 刘洋 ... Yuri Gagarin 加加林 P38 1 Brainstorming Use your knowledge and choose the correct answers. (1)How old is the earth? A. About 3. 5 bllion years B. About 4. s illion years. C. About 5.5 illion years. D. About 6.5 ilion years. (2) of the earth surface is covered by water. A.20% B.30% C.50% D. 70% (3) How many planets are there in the Solar System? A.6. B.7. C.8. D.9. (4)What is the total population of humans on the earth? A. About 3.5 billion. B. About 4.5 billion. C. About 5.5 billion. D. About 7.5 billion. 被...覆盖 太阳系 总数量 Pre-reading Test youself：Look at the following picurer . What are the Chinese names of the eight planets that circl