[名词解释] 烧伤

试述烧伤现场急救原则? 毒物中毒的作用机制是() ["A．局部刺激","B．缺氧","C．麻醉作用","D．抑制酶的活力","E．竞争受体"] 三度四分法 浅Ⅱ度烧伤 毒蕈碱主要引起() ["A．心率减慢、减弱","B．平滑肌痉挛","C．瞳孔扩大","D．瞳孔缩小","E．胃肠蠕动减弱"] 烧伤