丹参治疮痈肿痛，其作用在于（）
A.活血化瘀
B.凉血解毒
C.凉血消痈
D.行气止痛
E.凉血止血
参考答案：C
The police __________ going to search every corner of the city for the thief.[ ]
A. is
B. will
C. was
D. are
车辆上一般采用弹性元件有哪些类型？各有何特点？
