七码阶梯式倍投方案简介：Soon the class bell rang, and the history teacher Tong Liancheng walked into the classroom without saying much. Compared to other strict teachers, he was a good old man without a trace of temper.
Soon the class bell rang, and the history teacher Tong Liancheng walked into the classroom without saying much. Compared to other strict teachers, he was a good old man without a trace of temper.
