所谓规模经济，就是说T.厂或公司的规模越大，单位成本越低，收益就越大。( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31475' and id < 2523291 and id<>'2523291' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31475' and id > 2523291 and id<>'2523291' order by id asc limit 5