【素材展示】受不利天气形势的影响,中国持续大范围重度空气污染天气。北京、石家庄、唐山等城市空气出现严重污染,天津、哈尔滨、南京等城市空气出现重度污染。据媒体报道,2017年1月3日,受污染空气影响,西安市辖区内的所有中小学、幼儿园全部停课,机动车限号出行。受重污染空气影响,郑州市中小学和幼 【Material Display】 Affected by unfavorable weather conditions, China continues to have a wide range of heavy air pollution weather. Beijing, Shijiazhuang, Tangshan and other cities have serious air pollution, air pollution in Tianjin, Harbin, Nanjing and other cities. According to media reports, on January 3, 2017, affected by the contaminated air, all primary and secondary schools and kindergartens in the district of Xi’an were closed and the number of motor vehicles was restricted. Affected by heavy air pollution, primary and secondary schools in Zhengzhou and young