声音在（ ）中传播速度最快。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24942' and id < 2126593 and id<>'2126593' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24942' and id > 2126593 and id<>'2126593' order by id asc limit 5