生物安全柜的风机要求持续开放的时间是（    ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27498' and id < 2270305 and id<>'2270305' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27498' and id > 2270305 and id<>'2270305' order by id asc limit 5