单子叶植物根茎类中药材横切面上通常可见的一圈环纹是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='26297' and id < 2199923 and id<>'2199923' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26297' and id > 2199923 and id<>'2199923' order by id asc limit 5