Older sisters often moan that their younger siblings have all the luck. But it seems they really do have something to co......

该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

目的调查健康老年男性的骨密度(BMD)变化规律并分析和原发性骨质疏松症(OP)相关的临床危险因素。方法在北京市朝阳区团结湖社区采......

Background: A reduction in mortality associated with wine drinking compared to beer drinking has been suggested in the p......

目的了解上海社区40~70岁中老年男性的生殖健康状况。方法按照整群及年龄分层、随机抽样的流行病学调查方法，自2009年11月至2010年6......