（1）　　If you are in any major city in America， the chances are high that you are not far from a Starbucks. In fact， you mig......

Air is all around us. We can’t live without air. It’s the most important thing for living things in the world.　　It’......

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......

An efficient and accurate analytical method was developed for the simultaneous determination of 20 synthetic food additi......