问题 单项选择题

下列对竞争六边形网络描述正确的是()。①克里斯泰勒关心的是在农村市场服务中心演化基础上发展起来的聚落体系的特征,又提出市场原则的两个限制因素:一是各级供应点必须达到最低数量以使商人的利润最大化;二是一个地区的所有人口都应得到每一种商品的提供或服务;②为满足第二个条件,模式的概括中就必须采用商品的最大销售距离,使供应点的数量达到最少化;③竞争导致区内中心地的增多,直至各中心地的互补区彼此相切,但这种格局依然留有“空白”,不是最佳;④克里斯泰勒根据推算,认为这种多边形应是正六边形,而且只有当互补区为正六边形时,消费者到中心地的距离才能保证最短,经济上最合理。

A.①②③

B.①③④

C.①②③④

D.③④

答案

参考答案:B

解析:为了满足各级供应点必须达到最低数量以使商人的利润最大化,模式的概括中就必须采用商品的最大销售距离。

阅读理解

阅读理解

     Where do you want to travel this year? What are some of your favorite vacation spots? See some

places we have picked as the top destinations for 2010.

     ●Sri Lanka

     The island feels like one big tropical zoo: elephants roam freely, water buffaloes(水牛) idle in paddy

fields and monkeys swing from trees. And then there's the beautiful coastline. Among the most scenic is

Nilaveli Beach in the Tamil north. Vacationers can lie on poolside hammocks(吊床) under palm trees or

swim in its crystal-clear waters. Or they can order cocktails at the Nilaveli Beach Hotel.

     ●Shanghai

     Following up on Beijing's successful Olympics, Shanghai is expecting 70 million visitors to its World

Expo. From May 1 to Oct. 31, more than 200 nations and regions will turn a two-square-mile site by the

city's Huangpu River into an architectural playground: Switzerland will be represented by a building

shaped like a map of that country, while England is in the celebrated hands of the designer Thomas

Heatherwick. However, by contrast, the United States pavilion might be mistaken for a suburban(郊区

的) office park.

     ●Copenhagen

     Last year, thousands of environmentalists challenged world leaders in Copenhagen for the climate

summit, but the Danish capital has already emerged as one of the world's greenest, and maybe coolest,

cities. In Copenhagen, long, flat roads all have bicycle paths where locals cycle around the city. Away

from all the modernism and the happy cyclists, cultural thrill-seekers are being attracted to the district of

Norrebro, where the city's young crowd the cafes and galleries or dance in local clubs until the early hours.

1. According to the passage, visitors to the palce with natural beauty can have _____________.

A. a vacation on the palm beach

B. a great time in busy local clubs

C. a feast for the eyes of architectural wonders

D. a chance to see an environmentally friendly city

2. Which of the following statements is TRUE about the 2010 World Expo?

A. Millions of people will visit Shanghai in seven months.

B. Switzerland has built something that looks like a map of the world.

C. The building of England is designed by Thomas Heatherwick.

D. The US pavilion reminds people of downtown New York.

3. This passage is probably printed on the __________ page of a newspaper.

A. culture

B. entertainment

C. travel

D. weekend

4. Which of the following can be the best title for this passage?

A. A Trip to the World Expo

B. The Places to Go in 2010

C. Join the Copenhagen Climate Summit

D. The Most Visited Travel Destinations

多项选择题