六级听力：中国城市污染依然严峻（视频）
Latest readings show air pollution levels remain serious in seven Chinese cities.
The eastern coastal city of Jinan replaces Beijing's neighbor Shijiazhuang as the most polluted. After Shijiazhuang, five other northern cities round out the list: Handan, Zhengzhou, Zibo, Xi’an and Shenyang.
Their Air Pollution Index, or API, read over 300, the level for
. Beijing’s API has dropped to 184 and is off the top ten lists for now.版权所有：英语六级考试网 www.cet6w.com，转载请注明来源。