用二阶微分方程描述的动态电路称为二阶电路。（）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32672' and id < 2599046 and id<>'2599046' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32672' and id > 2599046 and id<>'2599046' order by id asc limit 5