⒈有一个表面画有方格的正方体,4只青蛙趴在不同的格子里。在正方体的另一面角落里有一个蓝色的圆圈(如图1)。4只青蛙都想爬到那个圆圈里,需要注意的是它们每次只能横着或竖着爬一个格子,不能斜着爬。请先想一想,再数一数,哪只青蛙先爬到圆圈里呢? ⒈ there is a square surface painted square, four frogs lying in different grid. In the other corner of the cube has a blue circle (Figure 1). All four frogs want to climb into the circle. One thing to note is that they can only climb a lattice horizontally or vertically at a time. Please think about it first, then the number of frogs, which frog climbed to the circle first?