【答案解析】In some cultures friendship means a strong life-long bond between two people. In these cultures friendships develop slowly, since they are built to last. American society is one of rapid change. Studies show that one out of five American families moves every year. American friendships develop quickly, and they may change just as quickly. People from the United States may at first seem friendly. Americans often chat easily with strangers. But American friendliness is not always an offer of true friendship. After an experience like Yaser"s people who"ve been in this country for only a few months may consider Americans to be fickle. Learning how Americans view friendship can help non-Americans avoid misunderstandings. It can also make them make friends the American way.