公共英語(yǔ)五級閱讀文章《火力發(fā)電廠(chǎng)》

　　對于想要在公共英語(yǔ)五級考試中取得比較理想成績(jì)的人來(lái)說(shuō)，閱讀理解是需要下苦功夫的。下面是小編整理給大家的一篇公共英語(yǔ)五級閱讀文章，希望對大家有用。

　　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：公共英語(yǔ)五級閱讀理解應試方法及技巧

　　(1)考生在考試時(shí)應注意合理分配時(shí)間，不可過(guò)多地把時(shí)間花在某篇文章或某個(gè)問(wèn)題上。

　　(2)在閱讀每篇文章之前，應先看文后的5個(gè)問(wèn)題，但不要閱讀每個(gè)問(wèn)題的選項，因為這些選項會(huì )干擾你的理解。帶著(zhù)問(wèn)題閱讀可使注意力更為集中，有的放矢地加工所需的信息。

　　(3)在做選擇題時(shí)，應先劃去看上去顯然不相關(guān)聯(lián)、不合邏輯或自相矛盾的選項。四選一試題的選項中一般都含有太離譜或不合邏輯的選項。劃去這些選擇項，選對答案的概率就要高得多。

　　(4)應把一篇文章后的題目全部做完后再閱讀下一篇文章。若出現暫時(shí)無(wú)法肯定某題答案的情況，可先依據材料及常識進(jìn)行猜測，選取一個(gè)答案，同時(shí)在該答案旁邊的空白處用鉛筆打個(gè)問(wèn)號，以便時(shí)間多余時(shí)可回過(guò)頭來(lái)迅捷地找到該問(wèn)題。請注意，一定要回答所有的問(wèn)題，因為即使猜錯也是不扣分的。

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