何谓卡方检验?
气管插管时致环杓关节脱位造成的声嘶一般出现在() ["A．拔管前","B．拔管后","C．术后第1～3天","D．术后2～8周","E．术后3～6月"]
预防新生儿硬肿症的措施有() ["A．避免早产、窒息、产伤","B．注意保暖","C．供给足够热量","D．预防感染","E．纠正器官功能紊乱"]
HIE预后与哪些因素有关() ["A．脑成熟度","B．病情严重程度","C．Apgar评分","D．抢救治疗是否及时","E．长期随访和康复训练"]
喉烧灼伤程度判断的辅助检查是() ["A．间接喉镜检查","B．支气管镜检查","C．喉部CT检查","D．喉部X线检查","E．直接喉镜检查"]
如何进行两均数的显著性检验?
