美国的东北部,泛指芝加哥以东五大湖流域的整个地区。这里人口畸形集中,工业异常发达,生产和消费堪称全美之最。它拥有钢铁、煤炭和加工工业的主要生产能力,完成全国工业生产总值的半数以上。但是,1970以来,作为该区交通动脉之一的铁路运输业,却有八家公司度日艰难,相继破产。似此铁路厄运,有使美国在90天内陷于 The northeast of the United States refers to the entire area of ​​the Great Lakes Basin to the east of Chicago. Concentrated population deformity here, abnormal industrial development, production and consumption of the nation’s most. It owns the major productive capacities of the steel, coal and processing industries and has completed more than half of the country’s industrial output. However, since 1970, as one of the transportation arteries in the area, there are eight companies that have been going through hard times and have gone bankrupt. Like this railway doom, the United States has trapped within 90 days