精选优质文档-倾情为你奉上Wearing GlassesThere are three graduation pictures we can see. Each of them has 22 students. In the primary only 4 students have glasses on their eyes, but the number of myopic (近视) students adds to 13 in the senior graduation picture. It is worst that in the collegial picture only 2 students dont wear glasses. From the picture we can see, the rate of students who are myopic is increasing sharply. This condition cannot be disregarded. I think there are probably two
