皮层和中柱为通气组织。内皮层细胞壁增厚，木化，有纹孔。维管束周木型。分泌腔淡黄色的药材是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='26295' and id < 2199762 and id<>'2199762' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26295' and id > 2199762 and id<>'2199762' order by id asc limit 5