脉冲频率调制（PFM)工作方式是维持不变，改变。（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32651' and id < 2596086 and id<>'2596086' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32651' and id > 2596086 and id<>'2596086' order by id asc limit 5