抽样调查的主要目的是（）。[中国海洋大学2020研]

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id < 2461104 and id<>'2461104' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id > 2461104 and id<>'2461104' order by id asc limit 5