电力系统的频率特性取决于（    ）的频率特性。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id < 4501935 and id<>'4501935' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id > 4501935 and id<>'4501935' order by id asc limit 5