清晨空气清新,进行一定的体育锻炼,全天受益无穷。但有些大学生,对这点却认识不足,或者意志不能战胜懒情,对热被窝恋恋不舍,以至上课铃声响过,有不少人才睡意朦胧地走进教室。为了解决这个“老大难”问题,近年来,我 Fresh air in the early morning and a certain amount of physical exercise will benefit the whole day. However, some college students do not know enough about this point, or they will not overcome the lazy feelings. They will be reluctant to be sore in their heat, and even the school class will ring, and many people sleep in the classroom with drowsiness. In order to solve this “profound” problem, in recent years, I