以下结构适合于U形管式换热器的是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id < 2125219 and id<>'2125219' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id > 2125219 and id<>'2125219' order by id asc limit 5