消化道出血时出现黑粪，提示每日出血量（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30906' and id < 2486880 and id<>'2486880' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30906' and id > 2486880 and id<>'2486880' order by id asc limit 5