既能化瘀止血,又能活血定痛的药物是()
A.仙鹤草
B.白及
C.三七
D.大蓟
E.槐角
参考答案:C
On top of the mountain ______, which was built 2,000 years ago.
A.a tower stands
B.stands a tower
C.standing a tower
D.does a tower stand
简述一个典型的真核基因的结构。