臂丛在躯干近端形成的周围神经是()
A．胸背神经
B．肩胛下神经
C．胸外侧神经
D．前臂内侧神经
E．胸长神经
参考答案：E
关于脑脊液鼻漏漏出部位的定位，可通过（）
A.鼻腔内镜检查
B.CT脑池造影
C.鞘内注射亚甲蓝
D.鞘内注射荧光素钠
E.鼻内镜手术探查
So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety.
A．must not
B．should not
C．need not
D．cannot
