右主支气管与气管中线成多少度角() ["A．10～20°","B．20～30°","C．30～40°","D．40～55°","E．50～60°"]
何谓姑息性放疗?
成骨细胞瘤的X线表现中，哪项欠妥() ["A．肿瘤大小为2～10cm不等","B．多位类圆形膨胀性骨破坏","C．边缘不清楚，周围常无骨增生硬化","D．可有少量骨膜反应","E．肿瘤周围的软组织可有局部肿胀"]
下列哪一项不是肩关节周围炎的主要功能障碍() ["A．肩痛","B．肩部活动受限","C．肌肉萎缩","D．肱二头肌硬结","E．手臂麻木"]
下列哪种恶性骨肿瘤最常见() ["A．骨肉瘤","B．软骨肉瘤","C．纤维肉瘤","D．Ewing肉瘤","E．脊索瘤"]
什么叫根治性放疗?
