单词：secondary source of infection
单词：secondary source of infection 相关文章
When youre looking for a table in a crowded cafeteria, you probably give wide berth to the family that sounds like its sharing a big dish of whooping cough. Well, not if youre a house finch, particularly a male. Because a study in the journal Biology
Scientific American(二)月
Broadcast: April 30, 2003 By Nancy Steinbach This is the VOA Special English Health Report. American researchers say drinking tea may help strengthen the body's defense system against infection. Docto
VOA2003（上）-健康资讯
By Kari Barber Dakar 21 March 2008 In many African countries, few people have access to computers and the Internet. Experts say this is hindering development and preventing students from being able to compete for jobs. At a conference in Dakar this w
VOA标准英语2008年（三月）
BERLIN, June 1 (Xinhua) -- Germany's disease control center reported on Wednesday 365 new cases of the fatal enterohemorrhagic E. coli (EHEC), which marked a sharp rise since its outbreak in the middle of May. Twenty-five percent of the new cases inv
英语新闻
Alan, Canada speaker How do I get my news? Well, when I lived in Canada I got my news from primarily watching television and reading the newspaper. But since I moved over to Asia and started using computers more and more I find that I get my main sou
一起闲话英语-English Chitchat
今天我们要学的词是infection。 Infection, 感染。 MIT scientists are developing a new drug that might be able to fight any viral infection, 麻省理工大学的科学家正在研究一种新药，可能可以治疗任何病毒感染。 Re
英语单词荟萃