房水为（ ）的液体，具有维持眼内压的功能。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30916' and id < 2488020 and id<>'2488020' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30916' and id > 2488020 and id<>'2488020' order by id asc limit 5