消毒、清洗生物安全柜时，对污染严重的区 域(排污槽)应用洗涤剂清洗的次数为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29763' and id < 2416908 and id<>'2416908' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29763' and id > 2416908 and id<>'2416908' order by id asc limit 5