1·Methods: Divided the rats into treatment group, model group, sham operation group and normal group by sortition randomization method.
实验方法：将大鼠用抽签法随机分组，分为治疗组、模型组、假手术组和正常对照组。
2·Yesterday I went to my school to sortition decide whose paper will be in for examining by unitive censor. Then I took several pictures by the way.
昨天去学校抽签(决定是否参加全市统一的论文盲审)，顺便拍了几张照片。