理想变压器特性方程中的符号与（   ）有关。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id < 4499935 and id<>'4499935' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id > 4499935 and id<>'4499935' order by id asc limit 5