断路器在电网故障时会自动跳闸,因此,断路器是一种保护电器。()（0.5）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69423' and id < 4495275 and id<>'4495275' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69423' and id > 4495275 and id<>'4495275' order by id asc limit 5