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问题 单项选择题

你正致力于所在城市的一个新项目，任务是建造环保的垃圾掩埋场。目前掩埋场地址很不受欢迎，此地的原居民已搬至临近的其他城市。然而尽管项目得到了公众支持，在被批准开始工作之前，需要召开若干该市政府的听证会。由于目前正处于规划阶段，在开始现场准备工作之前你正等待这些听证会的具体时间定下来并召开。这些听证会是（）的实例。

A、里程碑

B、强制性依赖关系

C、外部的依赖关系

D、任意依赖关系

答案

参考答案：C

单项选择题

The fact that most Americans live in urban areas does not mean that they reside in the center of large cities. In fact, more Americans live in the suburbs of large metropolitan areas than in the cities themselves.
The Bureau of the Census regards any area with more than 2,500 people as an urban area, and does not consider boundaries of cities and suburbs.
According to the Bureau, the political boundaries are less significant than the social and economic relationships and the transportation and communication systems that integrate a locale. The term used by the Bureau for an integrated metropolis is an MSA, which stands for Metropolitan Statistical Area. In general, an MSA is any area that contains a city and its surrounding suburbs and has a total population of 50,000 or more.
At the present time, the Bureau reports more than 280 MSAs, which together account for 75 percent of the U.S. population. In addition, the Bureau recognizes 18 megapolises, that is, continuous adjacent metropolitan areas. One of the most obvious megapolises includes a chain of hundreds of cities and suburbs across 10 states on the East Coast from Massachusetts to Virginia, including Boston, New York, and Washington D. C. In the Eastern Corridor, as it is called, a population of 45 million inhabitants is concentrated. Another megapolis that is growing rapidly is the California coast from San Francisco through Los Angeles to San Diego.

Which of the following are NOT considered important in defining an urban area

A．Political boundaries.

B．Transportation networks.

C．Social relationships.

D．Economic systems.
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判断题

对数量不多的砼小蜂窝，处理时可先用钢丝刷或用水冲洗干净，然后用1：2或1：2.5水泥砂浆修补。（）
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