硬膜外麻醉时，下列因素中对麻醉平面的影响最不重要的是()
A．穿刺间隙
B．患者体位
C．局麻药容积
D．导管方向
E．注药方式
参考答案：B
It is said that the Slender West Lake is ______. [ ]
A. worth of visiting
B. worth being visited
C. worthy a visit
D. worthy of being visited
汽缸产生向上拱起变形，会有哪些危害？
