打开易挥发或浓酸、浓碱试剂的瓶塞时，瓶口不要对着脸部或其他人，必 须在通风橱中打开瓶塞。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30402' and id < 2457815 and id<>'2457815' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30402' and id > 2457815 and id<>'2457815' order by id asc limit 5