禁止标志的含义是禁止人们不安全行为的（）标志。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25758' and id < 2164456 and id<>'2164456' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25758' and id > 2164456 and id<>'2164456' order by id asc limit 5