公共英语五级阅读文章《火力发电厂》

　　对于想要在公共英语五级考试中取得比较理想成绩的人来说，阅读理解是需要下苦功夫的。下面是小编整理给大家的一篇公共英语五级阅读文章，希望对大家有用。

公共英语五级阅读文章《火力发电厂》

　　Coal-fired Power Plants

　　The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate large amounts of electric power. Coal seemed to fit the bill, and it fueled the earliest power stations (which were set up at the end of the nineteenth century by Edison himself). As more power plants were constructed throughout the country, the reliance on coal increased. Since the First World War, coal-fired power plants have accounted for about half of the electricity produced in the United States each year. In 1986 such plants had a combined generating capacity of 289, 000 megawatts and consumed 83 percent of the nearly 900 million tons of coal mined in the country that year. Given the uncertainty in the future growth of nuclear power and in the supply of oil and natural gas, coal-fired power plants could well provide up to 70 percent of the electric power in the United States by the end of the century.

　　Yet, in spite of the fact that coal has long been a source of electricity and may remain one for many years (coal represents about 80 percent of United States fossil-fuel reserves), it has actually never been the most desirable fossil fuel for power plants. Coal contains less energy per unit of weight than natural gas or oil; it is difficult to transport, and it is associated with a host of environmental issues, among them acid rain. Since the late 1960's problems of emission control and waste disposal have sharply reduced the appeal of coal-fired power plants. The cost of ameliorating these environmental problems along with the rising cost of building a facility as large and complex as a coal-fired power plant, have also made such plants less attractive from a purely economic perspective.

　　Changes in the technological base of coal-fired power plants could restore their attractiveness, however. Whereas some of these changes are evolutionary and are intended mainly to increase the productivity of existing plants, completely new technologies for burning coal cleanly are also being developed.

　　附：公共英语五级阅读理解应试方法及技巧

　　(1)考生在考试时应注意合理分配时间，不可过多地把时间花在某篇文章或某个问题上。

　　(2)在阅读每篇文章之前，应先看文后的.5个问题，但不要阅读每个问题的选项，因为这些选项会干扰你的理解。带着问题阅读可使注意力更为集中，有的放矢地加工所需的信息。

　　(3)在做选择题时，应先划去看上去显然不相关联、不合逻辑或自相矛盾的选项。四选一试题的选项中一般都含有太离谱或不合逻辑的选项。划去这些选择项，选对答案的概率就要高得多。

　　(4)应把一篇文章后的题目全部做完后再阅读下一篇文章。若出现暂时无法肯定某题答案的情况，可先依据材料及常识进行猜测，选取一个答案，同时在该答案旁边的空白处用铅笔打个问号，以便时间多余时可回过头来迅捷地找到该问题。请注意，一定要回答所有的问题，因为即使猜错也是不扣分的。

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