实际不存在的剂量等级是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25689' and id < 2159393 and id<>'2159393' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25689' and id > 2159393 and id<>'2159393' order by id asc limit 5