合并单元常用的采样频率是（ ）Hz。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29471' and id < 2398731 and id<>'2398731' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29471' and id > 2398731 and id<>'2398731' order by id asc limit 5