我们已经学过很多的图形了,长方形、正方形、圆形……假如有人问我“你最喜欢的图形是什么?”我一定会大声告诉他“我最喜欢的图形是圆形。”圆形在生活中的作用非常大。我经常会在想:为什么盖子绝大部分是圆形的?比如矿泉水的盖子、酱油瓶的盖子……带着这个疑问,我请教了老师。老师告诉我,大多数瓶子里面装的东西需要密封,瓶盖是螺旋形的,做成圆形的盖子方便拧动,而且密封性好,所以瓶盖基本上都是圆形的。你们看,圆形的作用真大呢! We’ve learned a lot of graphics, rectangles, squares, circles ... If someone asks me, “What’s your favorite shape?” “I’ll tell him aloud” My favorite shape is a circle. "Circle in the role of life is very large. I often wonder: why the lid is mostly round? For example, mineral water cover, soy sauce bottle cover ... With this question, I consulted the teacher. The teacher told me that most of the bottles need to be sealed, the caps are spiral and the round caps are easy to tighten and the seals are good, so the caps are basically round. You see, the effect of a circle is great!