节约能源
another round of energy crisis is knocking at the door. in 2004, world oil consumption reached a new record, causing oil price in the international market to skyrocket amazingly.
as for china, it was reported that many traditional mineral cities in northeastern china had run into predicament, with their economy collapsed and workers unemployed, only because coal had been mined out.
fossil energy resources, including coal, oil and gas, are unlike sunlight, water power and wind power which are generated consistently. theyre not practically reproductive during human history. once consumed, theyre gone forever.
if they were to be exhausted before we could find sufficient reproductive resources to replace them with, wed have to live in entire blackout again like our ancestors have done thousands of years ago. thats of course not what anyone would want to see.
due to technical limitations, people still have to utilize these resources now.
as a result, we must economize them most cleverly. new techniques should be developed and applied to reduce energy cost in industry and daily life. alternative energy should be employed wherever possible. eradicate any practice that wastes energy.
humans have overcome so many crises in history, and were sure to win this time also.
GRE词汇记忆12大黄金法则
WOW版GRE核心词汇串讲(三)
GRE单词记忆方法全攻略
WOW版GRE核心词汇串讲(六)
WOW版GRE核心词汇串讲(五)
GRE考试历年真题之反义词荟萃:O-R字头
GRE考试中高级词汇背诵方法(下)
在电影《2012》中存在的GRE考点
GRE出国考试词汇辅导:GRE考试易混词汇(4)
GRE词汇学习,选择词典有原则
GRE考试历年真题之反义词荟萃:S-Z字头
WOW版GRE核心词汇串讲(二)
GRE出国考试词汇辅导:GRE考试易混词汇(2)
过来人精华总结20条背GRE单词经验
GRE考试历年真题之反义词荟萃:C—D字头
GRE词汇突破指南
GRE单词书应如何选择?
经验分享——GRE易混词汇总结
GRE考试历年真题之反义词荟萃:E—H字头
GRE单词记忆新法(二)
GRE考试词汇学习境界有三
GRE常见词根词汇(21)
GRE出国考试词汇辅导:GRE考试易混词汇(1)
GRE阅读“态度题”必备单词
经验分享:背GRE单词的“八字”原则
WOW版GRE核心词汇串讲(一)
GRE常见词根词汇(53)
GRE高分者教你如何攻克词汇难关
GRE单词记忆新法(一)
轻松看英文电影,快速记GRE词汇(二)
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |