Growth of trade will depend greatly on availability of energy sources. There may still be a trillion barrels of recoverable oil in the Middle East. But the oil crisis of 1974 has 11 to renewed interest in coal and to a search for 12 sources of energy. Solar, geothermal, and nuclear energy will play a large role in the years to come.
Solar energy is available in 13 forms. Buildings can be heated and cooled by direct use of solar radiation, crops and trees, which are the most efficient converters of sunlight into energy, can be grown for their energy potential, wastes can be burned as 14 , sunlight can be converted into DC electricity, electric power can be 15 from the sun-warmed surface waters of the ocean, and lastly, solar radiation can be converted into heat that will drive electric power generators. Serious problems still remain as to 16 and storage of solar energy.
Geothermal energy is the energy contained within the earth. Heat is abundantly available deep in the earths core and is constantly being produced. However, this heat is usually located at too deep a level for 17 exploitation. In short, very little is known on the use of geothermal energy, and it has 18 been exploited.
Nuclear energy is produced in nuclear power plants. At these plants atoms of uranium are split, thus 19 masses of energy. Another source of energy
under development is the nuclear fusion of certain atoms of hydrogen. This could eventually 20 natural gas as a source of energy.
A. rarely B. transformation C. fuel D. replace
E. led F. alternative G. commercial H. briefly
I. derived J. various K. relieving L. releasing
M. transportation N. financial O. described
II. E 12. F 13. J 14. C 15. I 16. M 17. G 18. A 19. L 20. D
雅思口语不可盲目跟读课文与录音
雅思指导:辨认和使用正式与非正式词汇
雅思口语备考的万能模板
雅思口语考试中不会怎么办?
让英语口语和我们一起成长!
雅思口语高分必备词汇:房屋与旅馆
雅思口语考官最爱问的经典问题大盘点(2)
提升三大能力成就雅思口语高分
雅思口语考官到底想让你展现什么?
如何甩掉口语表达中的中国味?
首考雅思6.5分通关:口语要注意细节练习
雅思口语考官最爱问的经典问题大盘点(4)
雅思口语考试的“潜规则”
锤炼雅思口语语音语调的三个步骤
雅思口语考官最爱问的经典问题大盘点(1)
让口语达到流利准确恰当的具体方法
雅思口语秘籍:六招让你赚足印象分
准杜拉拉们千万不可用错 英语口语之成语篇
雅思5.5到6.5分的跨越:口语要有创造性
雅思口语考试中经常出现的一些 “陷阱”
三个月打通你的听力和口语
康志刚:雅思口语常见句型200个
雅思口语每年换三次题库 更新三至四成旧题
雅思口语:偏难话题解析及备考思路
雅思口语八大“魔鬼话题”之媒体
八成应考者患英语“贫血症”
雅思口语较难话题的应对技巧
4月雅思口语考试最新命题趋势
雅思口语关于movie话题的一些素材
如何在雅思写作中灵活运用正式的书面语
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |