切去一段月季的枝条,插入湿润的沙土中,不久枝条下端萌发出新的根,这种繁殖方法叫[ ]
A.扦插
B.枝接
C.芽接
D.组织培养
答案:A
---My God! I’m getting late again. What will my boss say?
---You can keep _____now only if you make an honest explanation.
A.silent
B.calm
C.peaceful
D.quiet
长期食用缺少碘的食物,易患( )
A.侏儒症
B.甲抗
C.大脖子病
D.巨人症