钢的临界冷却速度越大，其淬透性越好。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24890' and id < 2124400 and id<>'2124400' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24890' and id > 2124400 and id<>'2124400' order by id asc limit 5