下列地形区中，位于我国地势第一阶梯上的是

班风是指一个班级稳定的、具有自身特色的集体风范，是一个班级中全体学生在思想、学习、生活等方面的共同倾向。（  ）

____Six.

____I have computer class, PE and science.

____How many classes do you have on Wednesdays?

____Is it Wednesday today?

____What do you have in the afternoon?

____Yes, it is.