．如图2，已知ABCDEF是边长为1的正六边形，则 的值为（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21584' and id < 1893141 and id<>'1893141' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21584' and id > 1893141 and id<>'1893141' order by id asc limit 5