题目

  American schools begin in September after a long summer holiday. There are two terms in a school year. The first term is from September to January, and the second is from February to June. Most American children begin to go to school when they are five years old. Most students are seventeen or eighteen years old when they finish high school. High school students take only four or five subjects each term. They usually go to the same classes every day, and they have homework for every class. After class they do many interesting things. After high school, many students go to college6．五路公共汽车从起点到终点共有15站，行驶路线 42千米，请问每两站相距多少千米？