艾尚托福阅读，我们一起背单词第八期：TPO21-1

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今天我们讲解托福TPO21-1 Geothermal Energy的第7题到第12题需要重点记忆的单词
7. Which of the following can be inferred from paragraph 2 and 3 about geothermal reservoirs?
定位答案原文：
<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>.
Geothermal reservoirs with temperatures above 180 centigrade are useful for generating electricity.
重点单词：
circulate v. 传播；循环；流通 （高中）
extract v. 提取；榨取 （CET4）
residential adj. 住宅的 （CET4）
正确选项：A higher geothermal reservoir temperature is needed to generate electricity than is needed to heat homes.

8. According to paragraph 4, extracting heat from very hot, dry rocks is difficult in part because
题干单词：
in part 部分地；在某种程度上
定位答案原文：
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.
重点单词：
permit v. 许可；允许 （高中）
artificially adv. 人工的；人造的；（高中）
正确选项：the underground rock must be fractured before heat can be removed from it.

9. The word “exploiting” in the passage is closest in meaning to
定位原文：
Experiments are under way to develop technologies for exploiting this resource.
重点单词：
exploit v. 开采；开发；利用 （高中）
选项单词：
locate v. 定位 （高中）
increase v. 增加 （高中）
make use of 利用；实用
estimate the size of 估算尺寸
exploit = make use of

10. How is the problem that the surface may sink related to the problem that water heated geothermal may contain toxic materials?
定位原文：
In addition, water heated geothermal can contain salts and toxic materials <dissolved from the hot rock>. These waters present a disposal problem [if they are not returned to the ground [from which they were removed]].
重点单词：
toxic adj. 有毒的 （CET4）
disposal n. 处理；清理 （CET4）
remove v. 移动；移除 （高中）
正确答案：Both problems could be solved <by returning groundwater> [that is removed from an underground heat reservoir back to the reservoir] [after heat is extracted from it].

11. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?
the highlighted sentence:
Geothermal energy is <in a sense> not renewable, [because <in most cases> the heat would be drawn out of a reservoir much more rapidly than it would be replaced <by the very slow geological processes> [by which heat flows through solid rock into a heat reservoir]].
重点单词：
renewable adj. 可更新的 （高中）
flow v. 流动 （高中）
solid n./adj. 固体；结实 （高中）
正确选项：The heat <quickly removed from a heat reservoir> is replaced so slowly by geological processes [that geothermal energy is not practically speaking, renewable].

12. In paragraph 6, the author implies that in California, Hawaii, the Philippines, Japan, Mexico, and the rift valleys of Africa the potential size of the geothermal resource is so large that
题干单词：
potential adj. /n. 潜能；可能 （高中）
定位原文：
However, in many places (for example, California, Hawaii, the Philippines, Japan, Mexico, and the rift valleys of Africa) the resource is potentially so large that its future will depend on the economics of production.
正确选项：it might be economically worth developing these sites even though geothermal energy is not renewable.
重点单词：be worth doing sth 值得做某事

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