高、低压变比越小，采用自耦变压器的效益越高。（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32685' and id < 2599918 and id<>'2599918' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32685' and id > 2599918 and id<>'2599918' order by id asc limit 5