Unit 8 Text 1 Arctic课件.ppt

Unit 8 Text 1;The main idea of the text:;;;Antarctic(南极洲);Arctic;The difference between Antarctic and Arctic;;;Oral practice:;Language Point;;distinction :n.区分,不同,特征,卓越disegtinguish :v.区分,使有别与,看清distinct: adj.不同的,个别的，单独的;Radiate: if sth radiates heat, light, or energy, or heat etc. radiate from it ,the heat is sent out in all direction(使光,能量)辐射,放射,发散 Eg. heat radiates from stove. n. radiation ;Average: A) n.平均数:平均标准 The average 4,5,and 9 is 6 B) adj.平均的 what’s the average rainfall for August in your country C) v. 平均为 Economic growth is expected to average 2% next year;;Key: average ,fair ,fair, ordinary average:一般水平 fair:次于优秀的,健康状况尚ordinary:强调普通,平常;;;;;;