弧光接地过电压常发生在中性点不接地系统中。(    )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id < 4504591 and id<>'4504591' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id > 4504591 and id<>'4504591' order by id asc limit 5