进一退二法倍投法详解图片简介：She calmed down and said to Su Can and Su Can: You go back to the classroom to study by yourself first. I want to ask the grade leader of the senior year, does he care about this matter?
She calmed down and said to Su Can and Su Can: You go back to the classroom to study by yourself first. I want to ask the grade leader of the senior year, does he care about this matter?
