同步发电机输出有功功率恒定，改变（   ）可以调节其无功功率。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id < 4498958 and id<>'4498958' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id > 4498958 and id<>'4498958' order by id asc limit 5