[简答题]

61) People in the United States in the nineteenth century were haunted by the prospect that Unprecedented change in the nation’s economy would bring social chaos. In the years following 1820, after several decades of relative stability, the economy entered a period of sustained and extremely rapid growth that continued to the end of the nineteenth century. 62) Accompanying that growth that was a structural change that featured increasing economic diversification and a gradual shift in the nation’s labor force from agriculture to manufacturing and other nonagricultural pursuits.
Although the birth rate continued to decline from its high level of the eighteenth and early nineteenth century, the population roughly doubled every generation during the rest of the nineteenth century. As the population grew, its make-up also changed. Massive waves of immigration brought new ethnic groups into the country. Geographic and social mobility—downward as

[单项选择]People in the United States in the nineteenth century were haunted by the prospect that unprecedented change in the nation’s economy would bring social chaos. In the years following 1820, after several decades of relative stability, the economy entered a period of sustained and extremely rapid growth that continued to the end of the nineteenth century. Accompanying that growth was a structural change that featured increasing economic diversification and a gradual shift in the nation’s labor force from agriculture to manufacturing and other nonagricultural pursuits.
Although the birth rate continued to decline from its high level of the eighteenth and early nineteenth centuries, the population roughly doubled every generation during the rest of the nineteenth century. As the population grew, its makeup also changed. Massive waves of immigration brought new ethnic groups into the country. Geographic and social mobility—downward as well as upward—touched almost everyone. Local stud
A. The economic development of the Unites States in the eighteenth century.
B. Ways in which economic development led to social changes in the United States.
C. Population growth in the western United States.
D. The increasing availability of industrial jobs for women in the Unites States.