In the 18th century New York was smaller than Philadelphia and Boston. Today it is the largest city in America. How can the chan

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问题     In the 18th century New York was smaller than Philadelphia and Boston. Today it is the largest city in America. How can the change in its size and importance be explained?
    To answer this question we must consider certain facts about geography, history and economics. Together these three will explain the huge growth of America’s most famous city.
    The map of the Northeast shows that four of the most heavily populated areas in this region are around seaports. At these points materials from across the sea enter the United States, and the product of the land are sent there for export across the sea.
    Economists know that places where transportation lines meet are good places for making raw materials into finished goods. That is why seaports often have cities nearby. But cities like New York needed more than their geographical location in order to become great industrial centers. Their development did not happen simply by chance.
Three hundred years ago, New York was______.

选项 A、the largest city in America then
B、the smallest city in America then
C、smaller than Philadelphia
D、larger than most cities of the world then

答案C

解析 细节推断题。由线索词。Three hundred years ago定位到第一段第一、二句。文章开头提到,在18世纪,纽约比费城和波士顿都小,如今却成为了美国最大的城市。题干中的Three hundred years ago即为原文中的In the 18th century,故C)正确。
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