人的血液总量约是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30913' and id < 2487725 and id<>'2487725' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30913' and id > 2487725 and id<>'2487725' order by id asc limit 5