下列有关核糖核苷二磷酸还原酶的描述，错误的是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25866' and id < 2171444 and id<>'2171444' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25866' and id > 2171444 and id<>'2171444' order by id asc limit 5