道尔顿制的缺点是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32156' and id < 2564465 and id<>'2564465' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32156' and id > 2564465 and id<>'2564465' order by id asc limit 5