花卉出现生长停滞,植株瘦小,叶片黄化可能是()缺乏。
A、N
B、P
C、K
D、Mn
参考答案:A
---Poor John! I could hardly recognize him just now!
---_______. He has changed so much.
A.Never mind
B.No problem
C.Not at all
D.Me, neither
颅内肿瘤通常不强化的是()
A、低级星形细胞刘
B、间变性星形细胞瘤
C、脑膜瘤
D、胶质母细胞瘤
E、室管膜瘤