The determination of tetramine and fluoroacetamide using GC - MS method unknown sample was discribed in this paper.本文采用GC -MS 法测定杀鼠剂产品中是否含有毒鼠强及氟乙酰胺,其方法准确、迅速、可操作性强.Objective To study clinical the clinical date of manifest...
You, Hetty, may not know what a merit it is a man to have truth.你还不知道, 海蒂, 对男人来说,诚实是多么重要啊!An impulse of feeling now overcame her timidity, and Hetty spoke.一阵感情激动冲破了羞怯, 海蒂终于说话了.That may be true as to you, Hetty, but it wi...
为什么香料在15世纪末期的欧洲如此贵重？Why were spices so highly valued in late 15th-century Europe?19世纪50年代末期，技术变革的速度加快了。In the late 1850s the speed of technological change quickened.这灌木是在这个季节末期才栽种的.The bush was planted late in the season...