携带以下哪类常见物质不可以靠近核磁设备？（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30407' and id < 2458201 and id<>'2458201' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30407' and id > 2458201 and id<>'2458201' order by id asc limit 5