光年是   计量单位。（ ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27099' and id < 2247047 and id<>'2247047' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27099' and id > 2247047 and id<>'2247047' order by id asc limit 5