鼻咽癌好发于哪个壁或部位() ["A．顶壁","B．后壁","C．隐窝","D．前壁","E．底壁"] 下列哪一种食物中毒以神经系统症状为主要临床表现且病死率较高() ["A．沙门氏茵食物中毒","B．嗜盐菌食物中毒","C．变形杆菌食物中毒","D．葡萄球菌食物中毒","E．肉毒杆菌食物中毒"] 鼻咽癌治疗中加用颅底野主要用于() ["A．颅底骨受侵时补量用","B．鼻咽顶壁肿瘤补量用","C．鼻咽旁间隙肿瘤残留补量用","D．鼻腔、后鼻孔肿瘤残留补量用","E．口咽受侵补量用"] 鼻咽癌最主要的颅内转移途径是() ["A．破裂孔","B．颈静脉孔","C．圆孔","D．卵圆孔","E．眶下裂"] 毒蛇咬伤最有效最有效的早期治疗方法() ["A．局部注射胰蛋白酶","B．局部清创","C．单价抗蛇毒血清","D．多价抗蛇毒血清","E．中醫中药"] 毒蛇咬伤最有效最有效的局部早期处理是()