Today over ninety-eight per cent of our energy comes from fossil fuels; coal, oil and natural gas. But coal and oil are not only fuels. They are also important raw materials for our chemical industries. People now think we should limit their use as fuel, otherwise the worlds supply will soon run out. Consequently, much research is being done into the practical use of the sun for heating buildings. The less fossil fuel we use now, the more we will have for the future.
Solar energy is transmitted from the sunthrough spaceto earth by electromagnetic radiation. It must be converted to heat before it can be used. Various types of solar energy collectors are used to convert the suns radiation to heat. Solar-heated hot water provides not only the buildings hot-water requirements, but space-heating as well. This solar system, based on water-heating, works like this. Each of its collectors, placed on the roof, consists of a shallow fiberglass tray that holds a number of copper tubes under a special glass cover. The tubes are, in turn, fixed to a blackened metal surface which absorbs energy from the sun. The suns rays, passing through the glass, heat the water in the tubes.
Since the energy is available only during the day and only then when there is not a great deal of cloud cover, the heat must be stored. This can be done in water, or in rock or pebble beds. The energy is stored in the hot water in the pipes.
21. Solar energy was first used_______.
A. to start a fire B. to cook food
C. to power a heating-system D. in a war
22. What must be done to solar energy before it can be used?
A. It must be stored in rock beds. B. It must be distilled.
C. It must be converted to heat. D. It must be purified.
23. There is so much research into the use of solar energy because _______.
A. more irrigation projects are needed B. the construction industry is expanding C. fossil fuels are running out D. it transmits electromagnetic radiation
24. Solar energy must be stored because_______.
A. it is limited B. there is not much of it
C. it is not always available D. the passage does not tell us why
25. How many uses has solar energy been put to according to the passage? A. 2. B. 3.
C. 4. D. More than 4.
21. D 22. C 23. C 24. C 25. B
雅思阅读T/F/NG题的解题小技巧
浅谈语法在雅思阅读备考中的重要性
雅思阅读精选:北京空气污染—最黑暗的一天
雅思阅读长句文法结构分析
学术类雅思阅读考试的阅读策略
雅思阅读精选:北京遭遇雾霾天气 城市环境告急
雅思阅读的做题方法与技巧(英)
雅思阅读的黄金法则及解题全攻略
循序渐进攻克雅思阅读的词和句
雅思阅读租房广告常用语解析
雅思阅读8种题型的答题攻略
雅思阅读考试的“解题三步曲”
提高雅思阅读分数的方法
雅思阅读技巧大全:Summary completion
雅思阅读做题的三个步骤
提高雅思阅读成绩 最好先做练习
雅思阅读四大障碍的克服方法
雅思阅读技巧大全:Matching headings
雅思阅读考试全程的注意事项
提高雅思阅读成绩的方法
雅思阅读题型做题技巧:matching(作者及其观点搭配题)
雅思阅读技巧大全:Sentence completion
雅思阅读考试的10条tips
雅思阅读技巧大全:Short answer questions
剑桥雅思阅读文章背景知识补充
雅思阅读常用词汇表
雅思阅读TURE/FALSE/NOT GIVEN的做题技巧
全面剖析雅思阅读的各类题型
雅思阅读考试拿满分的备考方法
雅思阅读备考策略(中学生适用)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |