烛焰为何会向下运动?

<正>一天晚上,家里突然停电了,小明为了做作业,点燃了一支蜡烛。但因为觉得一支蜡烛太暗了,所以他又点燃了一支,可是这两支蜡烛一支长些,一支短些(如图1)。过了一会儿,电来了,小明先吹灭了那支较短的蜡烛,没想到奇迹发生了:较长的那支蜡烛的火焰沿较短的那支蜡烛的烟雾传递过来,把较短的那支蜡烛点燃了!太神奇了,于是小明再次吹灭了那支较短的蜡烛,结果随后其又被点燃了,再次吹灭,再次被点燃……试     

宜君县退耕还林工程主要成就与存在问题及对策

退耕还林工程在宜君县实施10余年来,造林面积得到了扩大,提高了农业产业率,调整了农业产业结构,优化了土地利用,增加了农民收入,改善了生态环境,对提高人民生活水平起到了积极的促进作用。     

强者

五岁的汉克和爸爸、妈妈、哥哥一起到森林干活,突然间下起雨来,可是他们只带了一块雨披。爸爸将雨披给了妈妈,妈妈给了哥哥,哥哥又给了汉克。汉克问道:为什么爸爸给了妈妈,妈妈给了哥哥,哥哥又给了我     

新年短信集锦

2008年总结：过大年,雪灾了;炒牛市,崩盘了;留个影,艳照了;去旅游,暴乱了;乘飞机,罢航了;坐火车,出轨了;呆在家,地震了;发工资,都捐了;喝牛奶,结石了……这一年,太难了。好在,还有几天,2008就完了!祝新年快乐!     

胶南市食用菌产业发展现状及对策

阐述了胶南市食用菌产业发展现状,论述了其发展特点,分析了发展前景,指出了存在的问题,提出了发展对策,以期促进胶南市食用菌产业的发展。     

1952年山西省植棉劳模丰产技术介绍

1952年12月17日至25日,山西省召开了全省农业劳动模范代表大会,我同我所三位同志,参加了这一大会。在大会期间,我参加了山西各专区植棉劳模们的技术小讨论;并另外个别地访问了四位劳模。山西的植棉劳模,都是学习了曲耀离的丰产技术,获得了高额产量的。1959年运城专署,召开了六百多人的植棉技术训练班,由曲耀离亲自传授了技术     

红色巴中的振兴之路

“振兴老区,服务三农,科技列车巴中行”给老区人民带来了科学的理念,带来了科技人才,带来了科技项目,带来了科技效益,特别是为巴中传播了科学技术的种子,这枚种子在革命老区巴中生根发芽,开花结果,发展壮大。     

创新科技 发展节约型农业

海南垦区通过实施"橡胶中西移"战略,优化橡胶初加工厂布局,组建橡胶集团公司,创新农业科学技术,提升了国家橡胶基地的建设水平,调整了产业结构,整合了优势资源,合理配置了土地,降低了农业生产成本,提高了农业产出率,在建设节约型农业方面取得了显著成效,推进了企业增效、职工增收和示范带动作用增强目标的进一步实现,为构建和谐农垦和全面建设小康社会奠定了坚实的基础.     

培植主导产业壮大龙头企业奋力推进湖北农业产业化跨越式发展

我省是农业大省,自1997年开始有组织地推动农业产业化经营工作以来,在各级党委、政府的领导下,经过近10年的发展取得了比较明显的成效,培植了一批龙头企业,开发了一批名牌产品,建成了一批各具特色的板块基地,带动了一批农户,初步解决了千家万户小生产与大市场的对接问题.     

幽默

停电大热天的几个人一起打麻将,突然停电了,只好买个蜡烛继续战斗。过了半个小时,一人热得受不了了,说:还是开电风扇吧,热死了。另一个人连忙说:不能开,开了会把蜡烛吹灭的。     

日汉判断句的文体及其翻译

日语判断句的"普通体"、"郑重体"、"文章体"、"演说体"、"敬体"是日语教学中经常遇到的文体问题.文章对现代日语判断句的文体进行全面考察,通过例句同汉语判断句的文体进行比较.并对日语判断句各种文体的汉译问题进行探讨.通过考察、对比、翻译,力求全面准确地把握日语判断句的文体特点,从而达到恰如其分地运用其进行语言交际的目的.     

梅花与梅州的渊源

在史料的基础上进行逻辑分析,提出梅州命名来源路径为"梅花—梅溪—梅口—梅州";依史实否定"梅鋗说",并指出梅鋗与梅花的关联;"嘉应州"的名字也与"梅"相关。激励人们发扬梅花精神,建设美好梅州。     

Learning in context through conflict and alignment: Farmers and scientists in search of sustainable agriculture

This article analyzes learning in context through the prism of a sustainable dairy-farming project. The research was performed within a nutrient management project that involved the participation of farmers and scientists. Differences between heterogeneous forms of farmers knowledge and scientific knowledge were discursively constructed during conflict and subsequent alignment over the validity and relevance of knowledge. Both conflict and alignment appeared to be essential for learning in context. Conflict spurred learning when disagreeing groups of actors developed their knowledge in order to strengthen their arguments. Conflict caused self-referentiality when the actors no longer listened to each other. This inhibited self-reflection, thus blocking ongoing learning. Nevertheless, after a period of alignment, scientific models and knowledge of farmers were reevaluated and recontextualized. Through determining how to use scientific models and farmers knowledge for further learning, aimed at a shared goal, the participating actors also learned how to learn.Jasper Eshuis is a PhD candidate in the Department of Communication Management at Wageningen University, The Netherlands. His research deals with multiple land use, governance processes, and farmers decision-making. He is currently interested in monitoring and trust.Marian Stuiver is a PhD candidate in the Department of Rural Sociology of Wageningen University, The Netherlands. Her current research focuses on nutrient management, farmers innovation, and co-production of knowledge within the agricultural sciences.     

波兰小浆果育种项目的目标和成就

波兰小浆果育种主要在波兰果树和花卉研究所进行.育种目标主要是培育果实品质佳、适应当地气候和土壤条件、对流行的病虫害具有可以接受的抵抗能力、适合鲜食和适宜不同形式加工、抗寒力强并且具有很强的花期抗霜害能力的优良品种.为了扩大遗传基础,最近已经开始了种间杂交工作,并已培育出很多的优良品种.黑穗醋栗品种有"Bona","Ceres","Ores","Ruben","Tiben","Tines"和"Tisel";醋栗品种有"Hin-8el"和"Resika";红树莓品种有"Benefis","Beskid","Laszka","Nawojka","Pokusa","Polana","Polesie","Polka"和"Poranna Rosa";黑莓品种有"Gazda"and"Orkan";草莓品种有"Aga","Astra","Duht","Elkat","Elsar-iusz","Era","Fara","Feriusz","Filon","Filut",Hokent","Marduk"."Panon",Salut",Segal","Selvik"and"Vikat".这些品种显示出很强的市场前景并且在生产中的使用面积逐年增加.     

Free trade and environmental economics

In this paper, I argue that there is no essential inconsistency between a well-constructed free trade policy and environmental sound development. From an examination of the concept of free trade, I argue that free trade must mean environmentally sustainable trade. The argument is conceptual in nature. I argue that free trade must mean trade free of subsidies in which the price of a good fairly reflects the costs of its production. I then argue that environmentally unsustainable commodity trade is in fact subsidized. Therefore, the international regulation of this trade would be consistent with the goal of free trade. Moreover, such regulation could promote both environmental conservation and the long-run interest of developing countries. However, ethical and practical considerations demand that these regulations must be structured so that they do not have a negative short-term economic impact on developing countries. A mechanism to implement this policy is suggested.Notes 1. Work on this project was funded by a grant from George Mason University's International Institute.     

优质高产杂交香稻新组合“宜优673”的选育与应用

“宜优673”是福建省农科院水稻研究所用引进的优质三系不育系“宜香1A”与自育的强恢复系“福恢673”配组而成的杂交香稻新组合。该组合在多点试验、示范中,表现出米质优、穗大粒多,丰产性、稳产性好,适应性广等特点,2006年通过福建省品种审定。介绍了“宜优673”的栽培和制种技术要点。     

孔子与柏拉图有关理想社会的构想

孔子理想的国度,人际关系是平等的,没有阶级,没有剥削,社会财富共有,主张“德治”,国家统治者应是“贤人”。柏拉图理想的国度,人际关系是等级森严的,是有剥削的,有奴隶存在的,主张“法治”,国家统治者应是“哲学王”。     

高校思想政治教育与创新创业教育的双向构建

高校顺应社会经济发展要求,越来越重视思想政治教育与创新创业教育的融合。分析了思想政治教育与创新创业教育的互动关系,阐述了思想政治教育与创新创业教育双向构建优势,提出了构建的对策:教育理念层面实现互相融合、教学内容层面实现丰富升华、实践活动层面实现有机结合和组织管理层面实现系统完备。     

加快推进“三变”改革,实现城乡融合发展

我国作为一个发展中的农业大国,“三农”问题历来是全党工作的重点。农村“三变”改 革,是一项重要的理论创新、实践创新、机制创新,推进“三变”改革不但能够破解当前“三农”发 展瓶颈,还对城乡融合发展具有重要的推手作用。     

汉语介词“用”与英语介词“with”比较

从词性、句法功能、句中的位置、意义以及结构等方面对“用”与“w ith”进行比较,认为“用”与“w ith”在词性、句法功能、句中的位置上有同亦有异,在义项上,“w ith”远比“用”多得多。