小朋友们,你们知道什么叫“一笔画”吗?就是笔不离开线条,不在任何线条上重复,把这个图形给画出来。我们知道任何图形都是由点和线组成的,能一笔画成的图形必须是连通的图形。图形中的点可以分成两大类:凡是从这点出发的线条的条数是单数的,称为奇点;凡是从这点出发的线条的条 Children, do you know what you mean by “stroke”? That is, the pen does not leave the line, it does not repeat on any line, and draw the graphic. We know that any graphic is made up of dots and lines, and the one-stroke graphics must be connected graphics. Points in the graph can be divided into two categories: the number of lines starting from this point is singular, called the singular point, and any line from this point