综英book2unit5text2.pptVIP

* Paragraph1 Paragraph2 and 3 Paragraph4-8 Paragraph9-22 Paragraph23 Paragraph24-28 Paragraph 29 Paragraph 30 and 31 Paragraph 32 and 33 Paragraph1:The theme of the article: the villain in the atmosphere is carbon dioxide. Paragraph2 and 3:Carbon dioxide does not seem to be a villain, because it is not poisonous and it is essential to the life on earth. Paragraph4-8:But what it is doing will lead to a calamity. Paragraph9-22:An explanation of how carbon dioxide becomes a villain. Paragraph23:If the concentration of carbon dioxide in the atmosphere stays stable, the greenhouse effects won’t harm us. The key question is: Why dose it keep rising? Paragraph24-28: Two factors are responsible for that. The first one is that more and more fuels containing carbon are consumed ,and the second is forests have been disappearing rapidly .But it is people that have caused these two factors .Therefore, the author concludes, ”It is people ,then, who are the villains. Paragraph 29: Now what is to be done. Paragraph 30 and 31:The author’s answer to the question. Paragraph 32 and 33:The last two paragraphs have nothing to do with science and technology. They are about people . It is people who have caused the trouble And it is only people who can Solve the problem. Convert [k?n?v?:t] 1、convert sth into/to sth to change or to make sth change from one form ,purpose system . 使转变，转化。 The hotel is going to be converted into a nusuring home. 那家旅馆将被改造成私人疗养院。 2、convert sb from sth to sth To change or make sb change their religion or beliefs 使改变信仰，皈依 He converted from Christianity to Islam 他由信仰基督教改信伊斯兰教。 v. change the nature,purpose or fuction of sth （使）转变；使皈依；经过转变；被改变； n. a person who has been converted to another religious or political belief皈依者；改变宗教信仰者 liberate [?lib?reit] 1、release or deliver 释放，排放。 2、 liberate sb/sth (from sb/sth) free a country or a person from the control of sb else 解放 The city was liberated by the advancing