药材粉末用盐酸湿后，在铜片上摩擦，铜片表面显银白色光泽的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30686' and id < 2473262 and id<>'2473262' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30686' and id > 2473262 and id<>'2473262' order by id asc limit 5