硬膜外腔阻滞时，正中穿刺法和旁正中法都必须经过的是（）
A.棘上韧带
B.棘间韧带
C.黄韧带
D.硬脊膜
E.蛛网膜
参考答案：C
This kind of coat _ well, so the coats here have _____. [ ]
A. is sold, been sold out
B. sells, been sold out
C. sells, sold
D. is sold, sold
磁石的功效是
A．润肠通便B．养心安神C．止咳平喘D．聪耳明目E．活血散瘀
