藻类植物都没有( )
A.根、茎分化
B.茎、叶分化
C.叶、根分化
D.根、茎、叶的分化
答案:D
题目分析:藻类植物结构简单,无根、茎、叶的分化,藻类植物有单细胞的,也有多细胞的。
I can’t quite remember ______you started doing the work.[ ]
A. that it was when
B. when it was that
C. when was it that
D. that when it was
该种疾病的病因是()
A.细菌感染
B.睑板腺出口阻塞
C.睑板腺分泌功能过旺
D.真菌感染
E.睑板腺肉芽肿性炎症