不该发生的事路瑶中学组织学生上山采集昆虫、植物标本。临行前，郭老师强调了活动纪律：一切行动听指挥；不能随意离队另选路线，以免发生危险；万一同学之间距离拉大，应以呼声为信号，并必须有相应的回声以保持联系。各年级分开后，按规定的路线上山，一路上，和暖的春风吹 What should not happen Lu Yao Middle School organized students to collect insects and plant specimens from the mountains. Prior to his departure, Professor Guo emphasized the discipline of the activities: all actions listened to the command; they could not leave the team at will to choose alternative routes to avoid danger; in the event that the distance between students was widened, they should use cries as a signal and must have corresponding echoes to maintain contact. After each grade is separated, follow the prescribed route uphill, along the way, and warm spring breeze blowing