Purpose : To search for dobutamine ( Dob ) induced changes in left ventricular diastolic function in old myocardial infarction ( OMI ).目的: 评价多巴酚丁胺对心肌梗塞患者左室舒张功能有何影响.Forty - five convalescent patients with acute myocardial...
保存得太久的食品会变坏,是因为受到酵母菌, 霉菌和细菌的侵袭.Food which is kept too long decays because it is attacked by yeasts, molds and bacteria.防止啤酒变坏的主要方法是用纯酵母菌株发酵.The principal methods of avoiding spoilage are the use of pure yeast strains as ...