同步发电机并网运行时，若其端电压高于电网电压，会向电网输出（  ）？（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id < 4494894 and id<>'4494894' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id > 4494894 and id<>'4494894' order by id asc limit 5