“视觉悬崖”是一种测查婴儿（ ）的有效装置。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id < 2318561 and id<>'2318561' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28331' and id > 2318561 and id<>'2318561' order by id asc limit 5