【例5】 (2009安徽卷C篇)Sometimes, the simplest ideas are the best. For example, to absorb heat from the sun to heat water, you need large, flat, black surfaces. One way to do that is to build those surfaces specially, on the roofs of buildings. But why go to all that trouble when cities are full of black surfaces already, in the form of asphalt (柏油) roads?

　　Ten years ago, this thought came into the mind of Arian de Bondt, a Dutch engineer. He finally persuaded his boss to follow it up. The result is that their building is now heated in winter and cooled in summer by a system that relies on the surface of the road outside.

　　The heat­collector is a system of connected water pipes. Most of them run from one side of the street to the other, just under the asphalt road. Some, however, dive deep into the ground.

　　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, warning 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.

【高考英语复习冲刺训练：外研版必修3 Module4《Sandstorms in Asia》（附解析）】相关文章：

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第4组（含解析）

★ 2017届高考英语二轮复习课时训练：19（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：命题趋势（含解析）

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第18组（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：13（含解析）

★ 北京市2014高考英语一轮复习 练习手册（22）必修5 Unit 2 The United Kingdom（含解析）新人教版

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 1《School life》单元检测（含解析）

★ 2017届高考英语二轮复习课时训练：23（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit1《Friendship》

★ 2014高考英语（新人教版）一轮基础训练（12）A、B卷（附答案或解析）