按经济用途分类,绵羊分为哪些类?
参考答案:
粗毛羊,肉脂羊,裘皮羊,羔皮羊,细毛羊,半细毛羊
隋唐时期的时代特点()
Could you please ________ such a thing again? [ ]
A. not to do
B. don't do
C. not doing
D. not do