当无功不足时而造成电压偏差过大时，采用的措施有（）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='10449' and id < 835875 and id<>'835875' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='10449' and id > 835875 and id<>'835875' order by id asc limit 5