题目

When young, I dreamed of becoming many things. I wished I was an astronaut going up into space, finding new planets and jumping around in a cool space suit. I imagined being a cowboy in the having gun fights and wearing stylish cowboy boots. I pretended to be a famous footballer, using my skills to score lots of goals. I love being able to play the role of somebody, even just for a short time, to try to realize what it might be like to walk in their shoes. Looking back, I realize that imagination is a wonderful thing. I was able to create entire environments and scenarios (剧情梗概我们知道在电流的周围存在着磁场，磁场之间有力的作用。磁场对电流的作用其实质就是磁场与磁场间的作用。因而人们猜想电流之间有没有力的作用呢？如果有，它们之间的相互作用有什么规律吗？请你设计实验来探究此问题。