Unit4GlobalwarmingⅢLearningaboutLanguageUsingLanguage课件（人教选修6）.ppt

语篇理解;Ⅰ.Read the text and answer the following questions. 1．Why does Ouyang Guang write this letter to Earth Care? 答案： 2．What causes the growth of the greenhouse gas, carbon dioxide in the air? 答案： 3．What uses a lot of energy every day? 答案：;Ⅱ.Read the text and fill in the blanks.; Earth Care;A．词义配对 1．widespread　　　　 A．a promise to do something 2．average B．happening without being planned or thought about 3．advocate C．the facts or conditions that affect a situation;4．circumstance D．publicly support a particular policy or ways of doing things 5．casual E．around a usual or an ordinary level or standard 6.commitment F．existing or happening in many places or situations, or among many people 答案：1－F；2－E；3－D；4－C；5－B；6－A;B．根据构词法(-ency, -ence, -tion, -or, -ation, -ment)写出单词 7．tend (vi.)→ (n.) 8．exist (vi.)→ (n.) 9．pollute (vt.)→ (n.) 10．present (vt.)→ (n.) 11．disagree (vi.)→ (n.) 12．educate (vt.)→ (n.)→ (n.);1．average [教材P29原句]　The greenhouse effect gives the earth’s surface the average temperature of 15℃. 温室效应使地球表面的平均温度保持在15℃。 ;(1)adj.平均的；普通的 ①The average price of houses in this city has increased by nearly 30%. 这个城市的平均房价增长了近百分之三十。 ②There was nothing special about the film — it was only average. 这部影片没有什么特别之处——不过是一般的片子。;(2)n.平均；平均数 ③The Houston Rockets lost their first five games by an average of six points. 休斯敦火箭队遭遇开局五连败，平均每场输6分。 ④On (the) average, a powerful earthquake occurs less than once every two years. 通常，强烈的地震每两年发生不到一次。 ⑤Mary’s school work is well above (the) average. 玛丽的学习成绩远远高于平均水平。;⑥ 　　　　　　 平均有(后跟数词) ⑦