<a class="" title="" href="../../../population/2012-08/20/content_26283653.htm" target="_blank">北京暂住人口去年减少60万</a> <a class="" title="" href="../../../environment/2012-08/20/content_26283583.htm" target="_blank">约百万人遭受交通噪音污染</a> _中国发展门户网