判断钢材是否不锈钢的最简单方法是检査其是否有磁性，有磁性则不是不锈钢。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24887' and id < 2124219 and id<>'2124219' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24887' and id > 2124219 and id<>'2124219' order by id asc limit 5