呈类圆形；表面黑色、灰黑色或棕黑色，皱缩或有瘤状突起；体轻，质硬，断面类白色或黄白色，略呈颗粒状的药材是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29383' and id < 2393540 and id<>'2393540' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29383' and id > 2393540 and id<>'2393540' order by id asc limit 5