种子生产经营许可证上载明的生产的种子品种、地点发生变更的,应当在播种前()日申请变更?
A.20
B.30
C.60
D.90
参考答案:B
In the forest corresponding to the following binary tree, how many children does node Bhave
A.31
B.2
C.3
D.4
“丹青绮焕,备庶物之形容”中“形容”的意思是()
A.形象仪容
B.形态状貌
C.炮制方法
D.性质作用
E.种类