在对称分量法中，若各序分量具有独立性，则此电路应为(  )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69514' and id < 4503415 and id<>'4503415' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69514' and id > 4503415 and id<>'4503415' order by id asc limit 5