增感屏结构中反射层的作用是() ["A．提高发光效率","B．提高清晰度","C．改善颗粒度","D．控制量子斑点","E．提高对比度"]
简述涎腺多形性腺瘤的病理特点。
踝扭伤评定时不适用放射线摄影的情况是() ["A．Ⅰ级损伤","B．Ⅱ级损伤","C．Ⅲ级损伤","D．外踝压痛","E．4～6周保守措施无效、愈合缓慢的损伤"]
通过力的传导引起的损伤多为() ["A．撞击伤","B．碾压伤","C．挫伤","D．扭伤和撕裂伤","E．擦伤"]
简述髓腔解剖特点对牙髓炎的意义。
简述造釉细胞瘤的病理特征。
