Comparative research on social security system between the US and Sweden 并列题名:Comparative research on social security system between the US and Sweden Comparative study of social assistance system between China and the United States Research on social security system in rural China 并列题名:Research on social security system in rural China comparative research on rural modernization in China and India Comparative research on animal welfare law between China and the European Union 并列题名:Comparative study of social assistance system between China and the United States comparative studies of art education between east and west