妊娠20周末的子宫底高度约为（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25965' and id < 2177779 and id<>'2177779' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25965' and id > 2177779 and id<>'2177779' order by id asc limit 5