鼻咽癌就诊时上颈部有转移淋巴结发生的几率约为() ["A．10%左右","B．30%左右","C．40%左右","D．60%～80%左右","E．100%"]
用于胃肠道造影的对比剂是() ["A．硫化钡","B．氯化钡","C．碳酸钡","D．硫酸钡","E．氰化铂钡"]
分化程度低的下咽癌根治性放射治疗后失败的主要原因是() ["A．头颈部第二原发癌","B．局部未控","C．局部复发","D．颈部转移","E．远处转移"]
关于对比剂的叙述，错误的是() ["A．用以形成人工对比","B．能显示组织器官的形态","C．有阴性及阳性两类对比剂","D．非离子型对比剂毒性较大","E．与周围组织器官能形成密度差别"]
何谓多器官衰竭?
多器官衰竭的病因及其诱因有哪些?
