16．肺癌治疗的最主要的失败原因是() ["A．局部复发","B．血行转移","C．胸外淋巴结","D．胸膜转移","E．胸内淋巴结复发"]
小细胞未分化肺癌转移的发生率为() ["A．10%左右","B．20%左右","C．5%左右","D．80%左右","E．40%左右"]
肺癌伴锁骨上淋巴结转移，垂直照射野上界应在() ["A．胸骨切迹上1cm","B．胸骨切迹水平","C．环甲膜水平","D．气管隆突水平","E．胸骨切迹下1cm"]
畸胎类肿瘤好发部位，下列哪项是不正确的() ["A．盆腔","B．纵隔","C．腹膜后","D．骶尾部","E．鼻咽部"]
代表两心房去极化过程的是()两心室复极化过程形成()两心房在复极化过程形成() ["A．心电图的P波","B．心电图的QRS波群","C．心电图的ST段","D．心电图的Ta波","E．心电图的T波"]
可导致左心室压力负荷过重的因素是()可导致右心室压力负荷过重的因素是()可导致左心室容量负荷过重的因素是()
