算和值公式简介：More than twenty minutes passed, and the day's exam was over. The exam bell rang, and the students filed out, chattering and discussing. Su Can went to pack his schoolbag, and Su Weimin was waiting outside the classroom.
More than twenty minutes passed, and the day's exam was over. The exam bell rang, and the students filed out, chattering and discussing. Su Can went to pack his schoolbag, and Su Weimin was waiting outside the classroom.
