题目

Calvin Coolidge （1872 – 1933） was the thirtieth president of the United States. He looked down on a person as being unworthy of respect who was too fond of talking about the details of others people’s actions and private lives because he had no time for small talks. The following two incidents clearly show how Collidge treasured silence. When he was vice president, Coolidge had plenty of opportunities to participate （参加） in Washington’s social life, especially the many dinner parties. As be ignored the art of conversation, he couldn’t exactly make himself dear to his hostes17．“以钢为纲，把树砍光”，这对20世纪50年代某项经济建设活动的诙谐描述。其主要影响是（　　）①自然环境遭受破坏                  ②国民经济比例失调③民众生活水平下降                  ④工业体系初步建立。A．②③④B．①③④C．①②④D．①②③