大小单双倍投方案简介：During the lunch break, Yang Xiaomin appeared in the class and adjusted the seats of the students in the class. The seats of the students with good grades were not adjusted, but the seats of the middle-level students were mainly adjusted.
During the lunch break, Yang Xiaomin appeared in the class and adjusted the seats of the students in the class. The seats of the students with good grades were not adjusted, but the seats of the middle-level students were mainly adjusted.
