临床上治疗鼻咽癌的主要手段是() ["A．手术","B．化学治疗","C．放射治疗","D．支持治疗","E．中医治疗"]
颌顶位又称为() ["A．顶颌位 ","B．下上轴位","C．上下轴位 ","D．额鼻位","E．后前位"]
下列说法正确的是() ["A．脊神经由横突孔穿出","B．椎体两侧有椎动脉经各椎间孔进入颅内","C．颈椎后侧方左右各有一交感神经干","D．椎体后方的椎弓围成椎管，内有脊髓","E．颈椎是脊柱各椎体中体积最小的椎体，且为最灵活的椎节"]
静脉肾盂造影检查的禁忌证是() ["A．肾盂积水","B．肾结石","C．尿路狭窄","D．肾部肿瘤","E．肾功能严重损伤"]
试述急性左心衰血管扩张药的选用原则。
试述复苏有效的指征。
