题目内容
肉桂药材断面中央有一条棕黄色的线纹,是
2021-10-23
A.形成层环
B.纤维束环带
C.薄壁细胞环带
D.石细胞环带
E.韧皮部环
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='26293' and id < 2199547 and id<>'2199547' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26293' and id > 2199547 and id<>'2199547' order by id asc limit 5