已知i是虚数单位，则 i+i 2+i 3+…+i 2011=（注：指数从1到2011共2011项连加）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19254' and id < 1663769 and id<>'1663769' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19254' and id > 1663769 and id<>'1663769' order by id asc limit 5