测得某一蛋白质样品氮含量为0.2g，此样品蛋白质含量是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30240' and id < 2446329 and id<>'2446329' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30240' and id > 2446329 and id<>'2446329' order by id asc limit 5