TPO23 urban climates 一道题求解！

贤小哲 · 发表于 2011-11-21 13:50:47

第5题，文中说countryside的植被可以prevent heat from easily flowing into and out of ground.那么就是说乡村的植被可以使heat不那么容易进入或流出土地，就相当于可以使heat trap（呆在）土地里。而5题答案却说countryside的植被prevent heat from being trapped in ground. 这不刚好相反吗？

凌幽若 · 发表于 2011-11-21 21:00:25

你妹啊~这题我也排除了D，同lz原因
市中心温差大、material's heat capacity高、heat容易进进出出；城郊相反
看了几遍都觉得没看错啊

搭车问第九题
Paragraph 4 supports the idea that a city’s heat-island intensity would increase if ？
○ the city went into an economic decline and lost population
○ the city’s economy shifted from heavy industry to health care and education
○ there was an upward trend in the average age of the city’s residents
○ repair work on the streets slowed traffic throughout the city
Cities, then, are warmer than the surrounding rural areas, and together they produce a phenomenon known as the urban heat island. Heat islands develop best under particular conditions associated with light winds, but they can form almost any time. The precise configuration of a heat island depends on several factors. For example, the wind can make a heat island stretch in the direction it blows. When a heat island is well developed, variations can be extreme; in winter, busy streets in cities can be 1.7℃ warmer than the side streets. Areas near traffic lights can be similarly warmer than the areas between them because of the effect of cars standing in traffic instead of moving. The maximum differences in temperature between neighboring urban and rural environments is called the heat-island intensity for that region. In general, the larger the city, the greater its heat-island intensity. The actual level of intensity depends on such factors as the physical layout, population density, and productive activities of a metropolis.

与其说四个选项都不对，不如说不知道D选项什么意思，望高人解释通顺

凌幽若 · 发表于 2011-11-21 21:07:34

第四题也想不通，insulation在标示段没有涉及，难道也出进考题了。。。
Paragraph 3: The burning of fuel, such as by cars, is not the only source of this increased heat. Two other factors contribute to the higher overall temperature in cities. The first is the heat capacity of the materials that constitute the city, which is typically dominated by concrete and asphalt. During the day, heat from the Sun can be conducted into these materials and stored—to be released at night. But in the countryside materials have a significantly lower heat capacity because a vegetative blanket prevents heat from easily flowing into and out of the ground. The second factor is that radiant heat coming into the city from the Sun is trapped in two ways: (1) by a continuing series of reflections among the numerous vertical surfaces that buildings present and (2) by the dust dome the cloudlike layer of polluted air that most cities produce. Shortwave radiation from the Sun passes through the pollution dome more easily than outgoing longwave radiation does; the latter is absorbed by the gaseous pollutants of the dome and reradiated back to the urban surface.

4. According to paragraph 3, each of the following contributes to making urban areas warmer than the surrounding countryside EXCEPT
○the fuel burned by motor vehicles
○how well the house is insulated
○the easy flow of heat into the ground in city areas covered by vegetation
○the repeated reflection of solar radiation back and forth among buildings
关键是C为什么不对，是因为areas covered by vegetation这个后置定语错了吗？

lzy19940301 · 发表于 2011-12-2 12:39:00

第九题倒是可以理解，因为文中说Areas near traffic lights can be similarly warmer than the areas between them because of the effect of cars standing in traffic instead of moving. trafFIC一停就开始有大量热聚集。
但第五题我也不明白了，选项和原文明显是相反的！！！

TPO23 urban climates 一道题求解！

所属分类: TOEFL / IELTS

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