新托福考试：为您整理托福阅读考题：Geothermal Energy（二）

Paragraph 2: 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.

　　Paragraph 3: 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 sources are limited to those few areas where surface water seeps down through underground faults or fractures to reach deep racks heated by the recent activity of molten rock material. The world's largest supply of natural steam occurs at The Geysers, 120 kilometers north of San Francisco, California. In the 1990s enough electricity to meet about half the needs of San Francisco was being generated there. This facility was then in its third decade of production and was beginning to show signs of decline, perhaps because of overdevelopment. By the late 1990s some 70 geothermal electric-generating plants were in operation in California, Utah, Nevada, and Hawaii, generating enough power to supply about a million people. Eighteen countries now generate electricity using geothermal heat.

　　7. Which of the following can be inferred from paragraphs 2 and 3 about geothermal reservoirs?

　　O Volcanic heat is associated only with geothermal reservoirs that have a temperature over 180" centigrade.

　　O More countries produce power from geothermal reservoirs than use them for heating buildings.

　　O Most geothermal reservoirs are suitable for producing electricity.

　　O A higher geothermal reservoir temperature is needed to generate electricity than is needed to heat homes.

　　题型：推断题

　　定位词： geothermal reservoirs

　　解 题思路：A选项中的only过于绝对，找不到原文依据支持；B选项的说法也不正确，原文中并没有比较生产和使用地热能的国家的多少；C选项说法与原文矛 盾，用来发电的地热要超过180度，而最丰富的地热是在80度到180度之间。D项正确，因为 用来发电的地热要超过180度，而最丰富的地热是在80度到180度之间，可以用来取暖。

　　Paragraph 4: Extracting heat from very hot, dry rocks presents a more difficult problem: the rocks must be fractured to permit the circulation of water, and the water must be provided artificially. The rocks are fractured by water pumped down at very high pressures. Experiments are under way to develop technologies for exploiting this resource.

　　8. According to paragraph 4, extracting heat from very hot, dry rocks is difficult in part because