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.
What has made New York the largest city in America?

选项 A、Convenient geographic location.
B、Long history.
C、Rich economies.
D、All of above.

答案D

解析 综合归纳题。由线索词the largest city定位到第二段。文中说要回答纽约规模和重要性变化的问题,需要考虑很多因素,地理、历史及经济因素共同促成了美国这个著名城市的发展,因此D)正确。
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