用水作为提取溶剂，时间最短、操作极简单的提取方法是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='26291' and id < 2199333 and id<>'2199333' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26291' and id > 2199333 and id<>'2199333' order by id asc limit 5