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问题 多项选择题

下列关于运用拟合模型法对专卖管理信息进行分析的观点错误的是（）。

A．拟合模型法是一种重要的信息定性分析方法

B．拟合模型法的理论基础是数学、统计学、运筹学等

C．拟合模型法的关键是采集加工出的数据情报要能够反映出研究对象运动的特性

D．拟合模型法适用于非突变性随机问题

答案

参考答案：A, C

问答题

Passage 1 Development of the City Whatever the particular circumstances of a city, though, its vigour was likely to be affected by technological change. Just as it was improvements in farming that brought about the surpluses that made possible the first fixed settlements, so it was improvements in transport that made possible the development of trade on which the prosperity of so many cities depended. Other technological changes made it possible to survive in a city. The Romans, for instance, constructed aqueducts to bring fresh water to their towns and sewers to provide sanitation. But only the rich benefited. Most Romans, and many city-dwellers throughout history, lived in squalor, and many died of it. Towns were crowded and insanitary; people were often malnourished; and disease spread fast. Though cities grew in size and number for long periods, they could decline and fall, too. Between 1000 and 1300 Europe’s urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools). Then, with the Black Death, it fell by a quarter. Country people died too, but the city-dwellers were especially vulnerable. Their health depended above all on clean water and sanitation, which few had, and cheap soap and medicines, which had yet to be invented. Not surprisingly, the next big change in the development of the city also turned on a leap in technology: the invention of engines and manufacturing machinery. The Industrial Revolution did nothing at first to make urban life easier, but it did provide jobs—lots of them. With the new factories of the industrial age that began in the late 18th century was born an entirely new urban era. Peasants left the land in their multitudes to live in new cities, first in the north of England, then all over Europe and North America. By 1900, 13% of the world’s population had become urban.
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单项选择题

以下哪种算法是通过动态调整小区的CPICH的发射功率，来调整小区边界，实现相邻小区的负载平衡。（）。

A、载频切换

B、小区呼吸

C、潜在用户控制

D、准入控制
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