复数的虚部指的是什么

页面:/news/view-3409133/ | 耗时:0.2170 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=3409133 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3409133 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3409133 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(489019,1083528,1898566,1102570,1096969,3092959,440139,2792107,1833143,3345123,2471474,1592409,416413,1105932,1887742,1096440,1287740,1116559,391825,1085580,361849,3500935,1090068,1198998,583682,1083445,1166669,1096162,1102102,370022) ORDER BY field (ArticleID,489019,1083528,1898566,1102570,1096969,3092959,440139,2792107,1833143,3345123,2471474,1592409,416413,1105932,1887742,1096440,1287740,1116559,391825,1085580,361849,3500935,1090068,1198998,583682,1083445,1166669,1096162,1102102,370022)