Comparative study on urban law enforcement systems in Guangdong and Macao 并列题名:Comparative study on urban law enforcement systems in Guangdong and Macao Comparative study on emergency management systems and mechanism Comparative study on regulatory systems of foreign aid Comparative study on clinical pharmacy education systems in China and America Comparative study on student organization in universities in Guangdong,Hongkong, andMacao Comparative study of the basic law of Hong Kong and Macao Comparative study on NPO in Hong Kong and Macao Comparative study of local govenment systems in China and European countries Comparative study on the current status and reform of death penalty systems in China and the United States