要了解直观性教学的内在规律、因果关系，应选择的研究方法是 （ ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25992' and id < 2181459 and id<>'2181459' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25992' and id > 2181459 and id<>'2181459' order by id asc limit 5