鉴定是指运用专门知识对某些专门性问题进行的鉴别和判断的活动。鉴定人是指受聘请或指派以其专业知识及在其专业范围内的经验或专家意见等对某些专门性问题进行鉴别判断,提供鉴定意见的人。鉴定在每个国家的民事诉讼中都是一个重要的程序阶段。目前如交通事故、环境污染、医疗事故、药物副作用、产品质量等由科学鉴定扮演关 Identification refers to the use of expertise on certain special issues identification and judgment activities. Appraiser refers to the person who is hired or assigned to appraise and provide appraisal opinions on certain special problems based on his or her professional knowledge, experience in his professional field or expert opinion. Identification is an important procedural stage in civil litigation in each country. At present, such as traffic accidents, environmental pollution, medical accidents, drug side effects, product quality played by the scientific appraisal off