为了消除三次谐波以及减 小自耦变压器的零序阻抗，自耦变压器的第三绕组采取(  )接法。（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69416' and id < 4494566 and id<>'4494566' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69416' and id > 4494566 and id<>'4494566' order by id asc limit 5