美西战争前夕,美国在国外投资,总共只有六亿八千四佰五十万美元.American investments abroad totaled only $ 684,500,000 on the eve of the Spanish - American War.然此非常特殊的关系却早已于1898年的美西战争前即已存在.Those relationships were in place before the Spanish American Wa...
目的建立高效液相色谱法测定盐酸美西律片含量的方法.Aim To establish an HPLC method for determination of Mexiletine Hydrochloride tablets.利用在线富集技术测定药物佐米曲坦和盐酸美西律中的痕量杂质.An on line concentration technique was developed to determinate trace impurity i...