n类设备和in类设备都要采取接地或接零措施。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27213' and id < 2260477 and id<>'2260477' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27213' and id > 2260477 and id<>'2260477' order by id asc limit 5