【正文】 in winter, busy streets in cities can be ℃ warmer than the side streets. {13}█ {/13}Areas near traffic lights can be similarly warmer than the areas between them because of the effect of cars 滿分網(wǎng)（ ） standing in traffic instead of moving. The maximum differences in temperature between neighboring urban and rural environments is called the heatisland in tensity for that region. In general, the larger the city, the greater its heatisland intensity. The actual level of intensity depends on such factors as the physical layout, population density, and productive activities of a metropolis. The surfaceatmosphere relationships inside metropolitan areas produce a number of climatic peculiarities. For one thing, the presence or absence of moisture is affected by the special qualities of the urban surface. With much of the builtup landscape imperable by water, even gentle rain runs off almost immediately from rooftops, streets, and parking lots. Thus, city surfaces, as well as the air above them, tend to be drier between episodes of rain。s rock art the oldest continuous art tradition in the world. {27}█ {/27} Although the remarkable antiquity of Australia39。 that is about a third of the Dutch population. [2]Importing the grain, which would have been expensive and time consuming for the Dutch to have produced themselves, kept the price of grain low and thus stimulated individual demand for other foodstuffs and consumer goods.[/2] Apart from this, being able to give up laborintensive grain production freed both the land and the workforce far more productive agricultural divisions. The peasants specialized in livestock husbandry and dairy farming as well as in cultivating industrial crops and fodder crops: flax, madder, and rape were grown, as were tobacco, hops, and turning. These products were bought mostly by 滿分網(wǎng)（ ） urban businesses. There was also a demand among urban consumers far dairy products such as butter and cheese, which, in the sixteenth century, had bee more expensive than grain. The high prices encouraged the peasants to improve their animal husbandry techniques。 and if a house were perfectly insulated, one adult could also produce more than enough heat to warm it. Therefore, even without any industrial production of heat, an urban area tends to be warmer than the countryside that surrounds it. 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 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 ing into the city from the Sun is trapped in two ways: (1) by a continuing series of reflection among the numerous vertical surfaces that buildings present and (2) by the dust dome, the cloud like layer of polluted air that most cities produce. Shortwave radiation from the Sun passes through the pollution dome more easily than outgoing long wave radiation does。 and still others produced fruit and cultivated trees in nurseries. /i Where would the sentence best fit? Click on a square to add the sentence to the passage. █ █ █ 滿分網(wǎng)（ ） █ Right Answers:4,5,6 14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THERR answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Agriculture formed one of the primary sectors of the economy in seventeenthcentury Netherlands. The Baltic region produces large quantities of grain for export to other regions, including the Netherlands. The richest people grew enough fruits and vegetables to Supply the entire country with fresh produce An agricultural crisis that began in Europe did not affect Dutch landreclamation projects. Specialization in dairy farming, industrial crops, and horticulture allowed the Dutch to be more productive than some other regions in Europe. Land reclamation and improvement allowed the Dutch to meet demands for their agricultural products Because the Dutch had specialized their agricultural output they were less susceptible to the crisis that Europe experienced from the beginning of the century 滿分網(wǎng)（ ） Rock Art of the Australian Aborigines(TPO233) Ever since Europeans first explored Australia, people have been trying to understand the ancient rock drawings and carvings created by the Aborigines, the original inhabitants of the continent. Early in the nieenth century, encounters with Aboriginal rock art tended to be infrequent and open to speculative interpretation, but since the late nieenth century, awareness of the extent and variety of Australian rock art has been growing. In the latter decades of the twentieth century there were intensified efforts to understand and record the abundance of Australian rack art. The systematic study of this art is a relatively new discipline in Australia. Over the past four decades new discoveries have steadily added to the body of knowledge. The most significant data have e from a concentration on three major questions. First, what is the age of Australian rock art? Second, what is its stylistic anization and is it possible to discern a sequence or a pattern of development between styles? Third, i