Unit Five The Villain in the Atmosphere课件.ppt

Unit Five  The Villain in the Atmosphere Designed by Shi Yuan Reading and Translation Review—Memorize the new words Comprehension of the text Chinese and English phrases Words and expressions Difficult sentences Assignments Comprehension of the text Questions According to the author, who is the villain in the atmosphere? Carbon dioxide. What do we learn about the poisonous nature of carbon dioxide from the text? Carbon dioxide is not very poisonous and it is present in the atmosphere in a small quantity. Questions How is the surface of the earth warmed? It is warmed by the sun light, to which the various gases of the atmosphere are transparent. What will happen to the polar ice if the temperature on earth continues to rise? begin to melt Can you say something about the cost of stopping global warming? The stopping of global warming will take time, work and money. Words and expressions villain: n. 1) a bad person who harms other people or breaks the law Hes either a hero or a villain, depending on your point of view. 2) (infml) something or someone considered harmful or dangerous Weve always been told that cholesterol (胆固醇), in foods like eggs, was a major cause of heart disease but, actually, saturated(饱和的) fat is the worst villain. 这个问题的另一元凶在于政府本身。Another villain in the problem is the government itself. Collocation: villain of the piece剧中反面人物；首恶 poisonous: adj. containing or having the effect of poison Can you tell the difference between poisonous mushrooms and edible (可食用的) varieties? 这种药如大量服用是有害的。This medicine is poisonous if taken in large quantities. essential 1) n. a basic thing that you cannot live without Because I live in a remote village, I regard my car as an essential. 我们只来得及装上几件必需品。We only had time to pack a few essentials. 2) adj. necessary； needed It is essential for us to try to decide whether television is a blessing or a curse. Her most essential quality is kindness. convert 1) change from one form or use to another Coal can be conve