人体软组织平均声速是（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27184' and id < 2252592 and id<>'2252592' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27184' and id > 2252592 and id<>'2252592' order by id asc limit 5