可作为血样抗凝剂的是（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24963' and id < 2127177 and id<>'2127177' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24963' and id > 2127177 and id<>'2127177' order by id asc limit 5