并网的同步发电机向电网输出有功功率时，下列说法正确的是（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69508' and id < 4502959 and id<>'4502959' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69508' and id > 4502959 and id<>'4502959' order by id asc limit 5