Moths that fly by day are not properly to be called moths； they do not excite that pleasant sense of dark autumn nights a......

Christine and Shannon had an exciting time visiting Arran Island， meeting motor bikers and punks，1 and are now heading bac......

它是通过对真空密封造型法、实型铸造和磁型铸造等新工艺进行“工艺嫁接”而产生的一种新的铸造方法。它有时、省力、减少清砂工时......

本文建立了波长色散型X射线荧光光谱法测定土壤中溴的分析方法。通过粉末压片,采用国家一级标准物质建立校准曲线,优化测试条件,定......