[名词解释] 盔头

造成损伤的物理性因素有（） ["A、冷冻","B、灼烫","C、电流","D、声波","E、激光"] 下列哪些属于闭合性损伤（） ["A、挫伤","B、扭伤","C、擦伤","D、挤压伤","E、灼烫"] 下列哪些属于开放性损伤（） ["A、擦伤","B、刺伤","C、切割伤","D、裂伤","E、撕脱伤"] 水袖 髯口 盔头