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托福阅读TPO21|原文+题目+答案

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-01-30 10:45
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2021年1月30日发(作者:coin是什么意思)




小编给小托儿们带来了托福


TPO21


阅读原文,


希望备考


TPO


真题的同学一定要认真的看题、


做题,多研究积累才能 实现自我提升,预祝各位考生都取得理想的成绩。






Geothermal Energy





Earth's internal heat, fueled by radioactivity, provides the energy for





plate tectonics and continental drift, mountain building, and earthquakes. It





can also be harnessed to drive electric generators and heat homes. Geothermal





energy becomes available in a practical form when underground heat is





transferred by water that is heated as it passes through a subsurface region of





hot rocks (a heat reservoir) that may be hundreds or thousands of feet deep. The





water is usually naturally occurring groundwater that seeps down along fractures





in the rock; less typically, the water is artificially introduced by being





pumped down from the surface. The water is brought to the surface, as a liquid





or steam, through holes drilled for the purpose.





By far the most abundant form of geothermal energy occurs at the relatively





low temperatures of 80


°


to 180


°


centigrade. Water circulated through heat





reservoirs in this temperature range is able to extract enough heat to warm





residential, commercial, and industrial spaces. More than 20,000 apartments in





France are now heated by warm underground water drawn from a heat reservoir in a





geologic structure near Paris called the Paris Basin. Iceland sits on a volcanic





structure known as the Mid-Atlantic Ridge. Reykjavik, the capital of Iceland, is





entirely heated by geothermal energy derived from volcanic heat.





Geothermal reservoirs with temperatures above 180


°


centigrade are useful





for generating electricity. They occur primarily in regions of recent volcanic





activity as hot, dry rock; natural hot water; or natural steam. The latter two


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