电力系统中，变压器的容量一般是发电机容量的（   ）倍。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69399' and id < 4492786 and id<>'4492786' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69399' and id > 4492786 and id<>'4492786' order by id asc limit 5