淬火处理时，选用（ ）作为冷却剂，冷却速度最快。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24890' and id < 2124379 and id<>'2124379' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24890' and id > 2124379 and id<>'2124379' order by id asc limit 5