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问题 选择题

不久前，纽约艺术与设计博物馆建立了嗅觉艺术中心，拟于2011年11月举办首场香气作品展，展示过去百年历史上著名调香师的经典作品，将香气作为一种艺术品呈现给世人。该艺术中心之所以能够将调香师调制的香气作为艺术品，是因为调制的香气[ ]

①是人为的客体，不具备天然香气所具有的物质属性

②凝聚了人类的创造性劳动，满足了主体的审美需要

③是人脑加工和改造的产物，能满足主体的客观需要

④是主体按照审美需要制作的，具有使人愉悦的属性

A．①②

B．②③

C．②④

D．③④

答案

答案：C

填空题

某温带草原里有鸟、昆虫、猫头鹰、蟾蜍和鼠、蛇等6种动物，它们相互间的关系如图，请据图回答问题：

（1）此生态系统有______条食物链．占有2个或2个以上的营养级的生物有______．

（2）若能量转化率为15%，那么流入猫头鹰体内能量最少的那条食物链是______．

（3）蛇和猫头鹰之间的关系是______．

（4）鼠和草在结构层次上的主要区别是______．
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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 US 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 is the best title for the passage

A．Metropolitan Statistical Areas

B．Types of Population Centers

C．The Bureau of the Census

D．Megapolises
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