制造业循环性强, 因此,在经济下行中最先下滑,速度也较快.Manufacturing is highly cyclical, falling first and fast in a downturn.口服摄入砷化物的急性症状有恶心、呕吐、口腔和喉部烧灼感及腹部剧痛;可出现循环性虚脱.Symptoms of acute arsenic poisoning include nausea and abdominal pain followed...
Differential scanning calorimetry ( DSC ) determination of purity of chlorotoluron.研究了用差示扫描量热法(DSC ) 测定绿麦隆的纯度.To be familiar with the mechanism of indirect calorimetry.熟悉间接测热法的原理.The OPPLC was conformed by differential s...