同步发电机维持静态稳定的判据是(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id < 4501969 and id<>'4501969' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id > 4501969 and id<>'4501969' order by id asc limit 5