Periods when diseases spread around the world are called pandemics.疾病在全世界范围内传播时期称为大流行.Since then, there have been a total of eight cholera pandemics.从那时开始, 霍乱大流行总共爆发过8次.Previous pandemics have been characterized by waves...
脉搏增快和烦躁是缺氧的早期征兆.A fast pulse and restlessness are early signs of oxygen deprivation.目的探讨川芎嗪对一氧化碳中毒性缺氧的耐受作用.Objective To explore resistance to carbon monoxide poisonous hypoxia by Ligustrazin.必须把缺氧的人转移到有新鲜空气的地方.Persons la...