有一位朋友对我讲过这么一个故事:在他上中学的时候,有一位数学老师在黑板上画了这么几种线:一条直线,一条曲线,一条弧线和一对平行线,让他们自由选择自己喜欢的一种线,并简述理由。经过一阵骚动后,有好几个同学举起了手。第一位同学说,我喜欢直线,因为它最简单,永远也不会把自 A friend told me such a story: When he was in high school, there was a math teacher who drew such lines on the blackboard: a straight line, a curve, an arc and a pair of parallel lines, let them be free Choose one of your favorite lines and give a brief explanation. After a commotion, several classmates raised their hands. The first classmate said that I like straight lines because it is the easiest and never will