共四个文件：

cn_sql_server_2012_developer_edition_with_sp1_x64_dvd_1234492.iso
cn_sql_server_2012_developer_edition_with_sp1_x86_dvd_1457255.iso
cn_sql_server_2012_enterprise_edition_with_sp1_x64_dvd_1234495.iso
cn_sql_server_2012_enterprise_edition_with_sp1_x86_dvd_1458050.iso