船舶在海洋中航行，它的习惯速度单位是（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27101' and id < 2247222 and id<>'2247222' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27101' and id > 2247222 and id<>'2247222' order by id asc limit 5