透视学的研究始终是围绕着观察点、观察面和（ ）三者关系进行的，它们是透视过程中必备的运动的互为联系制约的因素。[湖南2019]

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24868' and id < 2123582 and id<>'2123582' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24868' and id > 2123582 and id<>'2123582' order by id asc limit 5