干冰是由（ ）凝结而成。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29889' and id < 2424821 and id<>'2424821' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29889' and id > 2424821 and id<>'2424821' order by id asc limit 5