【摘 要】
：
我国人均年占水量仅２２００吨，约为世界人均占水量７３００吨的１／４强，且分布不均，西北、华北缺水尤为严重。水资源短缺，已成为我国经济和社会发展的严重制约因素。 解决水资源短缺，一靠开源，二靠节流
论文部分内容阅读
我国人均年占水量仅２２００吨，约为世界人均占水量７３００吨的１／４强，且分布不均，西北、华北缺水尤为严重。水资源短缺，已成为我国经济和社会发展的严重制约因素。 解决水资源短缺，一靠开源，二靠节流。目前我们已确认并积极实施的节水技术、规划南水北调、抓紧水污染
China’s per capita annual water consumption is only 2,200 tons, about the world’s per capita water consumption of 7,300 tons of 1/4, and uneven distribution of water in Northwest China and North China is particularly serious. The shortage of water resources has become a serious constraint on China’s economic and social development. Solve the shortage of water resources, rely on open source, and second, by cutting costs. At present, we have confirmed and actively implemented the water-saving technologies, planning the South-to-North Water Diversion Project and paying close attention to water pollution
其他文献
Metropolitan areas around the world produce mountains of trashthat threaten to bury them.Landfills,the traditional repository for gar-bage,are now brimming ove
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
During my visit to America,I had a strange and unexpected experience. On my arrival at the University of California in Berkeley (伯克利——城市名), the host ar
EV ERY year more than 2000 young children go missing in NSW~2.Many are runways who leave home after fighting with their parents or their teachers. Some run awa
为了解学生的阅读心理,使图书馆与学生之间起到桥梁与纽带作用;正确引导学生利用有限的课余时间去阅读有益的书籍,让书籍成为他们的良师益友,提高学生的自身修养和素质。最
河北农垦中捷友谊农场将加快经济发展与推动生态产业相结合,充分利用农场周边闲散土地,计划分三期打造5万亩生态特色经济林。农场成立了项目实施小组,由中捷农业发展公司进行
In 1925 there was an immense shortage of pencils in Russia,becausethey all had to be imported from Germany.Before the first world war,there had been a small pe
鍥金晝山東省青島工藝美術研究所工藝美術師劉鴻雁獨創的鍥金晝,是用刀在滲染成赤橙黃綠青藍紫諸色的鋁板上鍥刻,借顯露出的鋁原色綫迹形成晝面的工藝品。它巧妙地利用光的
热点一:中国工业化道路的抉择入选理由:从2004年开始的“中国是否正进入新的重化工业阶段”的讨论在2005年度达到高潮。许多学术论坛及各类媒体不断有学者对此发表不同意见,
There is a new kind of spy—fly spy.which was beyond imaginationin the past.In the body of each fly spy is hidden a tiny radio station.These spies are sent fly