血液运行必备的条件是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25606' and id < 2154777 and id<>'2154777' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25606' and id > 2154777 and id<>'2154777' order by id asc limit 5