When the street surface gets hot in summer, water pumped through the pipes picks up this heat and takes it underground through one of the diving pipes. At a depth of 100 metres lies a natural aquifer (蓄水层) into which several heat exchangers (交换器) have been built. The hot water from the street runs through these exchangers, warming the groundwater, before returning to the surface through another pipe. The aquifer is thus used as a heat store.
In winter, the working system is changed slightly. Water is pumped through the heat exchangers to pick up the heat stored during summer. This water goes into the building and is used to warm the place up. After performing that task, it is pumped under the asphalt and its remaining heat keeps the road free of snow and ice.
[语篇解读] 文章介绍了怎样依靠外面的柏油马路表面在冬天给楼房供暖,在夏天给楼房降温。
4.Which of the following is true according to the first two paragraphs ?
A. Arian de Bondt got his idea from his boss.
B. Large, flat, black surfaces need to be built in cities.
C. The Dutch engineer’ s system has been widely used.
D. Heat can also be collected from asphalt roads.
[解析] 细节判断题。由文章第二段最后一句话可以得出答案。
[答案] D
5.For what purpose are the diving pipes used?
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