喉罩LMA的绝对禁忌证是() ["A．饮食少量流质病人","B．机械通气吸气压超过25cmH0者","C．上呼吸道有出血者","D．高危返流和误吸者","E．咽、喉有病变者"] 骨牵引常用的部位有() ["A．颅骨","B．尺骨鹰嘴","C．股骨髁上","D．腓骨","E．跟骨结节"] 下列哪项是LMA的绝对适应证是() ["A．气管插管困难病人","B．咽反射强烈病人","C．饱胃病人","D．小口畸形病人","E．咽喉部脓肿病人"] 挤压伤最严重的的并发症有() ["A．休克","B．软组织损伤","C．急性肾功能衰竭","D．急性肝功能衰竭","E．呼吸功能衰竭"] 4号喉罩密封罩一般充气() ["A．10ml","B．20ml","C．30ml","D．40ml","E．50ml"] 下列哪项是喉罩通气适应证()