胎儿通过的骨盆各假想平面中点的连线代表（    ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='61336' and id < 3891292 and id<>'3891292' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='61336' and id > 3891292 and id<>'3891292' order by id asc limit 5