以下器件中，（）属于单极型器件。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32680' and id < 2599568 and id<>'2599568' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32680' and id > 2599568 and id<>'2599568' order by id asc limit 5