In the process of exploiting and using water resources of river basin, the benefit conflict problems among upper and lower river districts and among different d
采用双因素随机区组田间试验设计,设置不同种植模式(单作和间作)和2个磷水平(不施P:P0;P:P75),研究柱花草与扭黄茅间作和施磷对牧草生物量、养分吸收的影响。结果表明:在株行
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Ecosystem conservation has become one of the purposes in river management as well as flood mitigation and water resources management, and understanding of river
物资企业的危机与生存谷琳琳经历了多年改革开放的巨大变革,奔泻涌动的社会主义市场经济大潮,使我国物资流通领域进入了新旧交替、内外交叉、中西交融的剧烈变动时期,多种经济成
建设工程项目相关各方权利和义务都是通过合同来确定的,建设工程合同是承包人进行工程建设,发包人支付款项的依据。建设工程合同管理贯穿于建设工程实施的整个过程,对于建设方合
油/气套管出线型式变压器,由于设备结构原因,现场对设备开展例行试验时,需要将油/气套管、SF6气室、GIS等打开,并回收SF6气体,工作难度大。为了在不破坏设备原有密封结构、不打开SF6
Consumption of safe drinking water is essential to human health. The excess of certain elements in drinking water causes health problem for people consuming the
星期一下午,杨市中心小学三(1)班正在上口语交际课——《小小展销会》。同学们兴致勃勃地进行着商品交易,教室里摆满了大家带来的旧玩具、旧书,人声鼎沸,热闹非凡。有的同学在滔
A comprehensive study was conducted to evaluate a rural community’s efforts to solve its potable water problem. Residents of St. Margaret village has built a r