介质中声波传播速度最慢的是 i

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25733' and id < 2163124 and id<>'2163124' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25733' and id > 2163124 and id<>'2163124' order by id asc limit 5