单词：infectious dose 50
单词：infectious dose 50 相关文章
DEVELOPMENT REPORT -February 18, 2002: Infectious Diseases By Jill Moss This is the VOA Special English Development Report. The World Health Organization and several other United Nations agencies are
农业与发展
This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? A direct effect on human health related to climate change is the likely increase in infectious diseases transmitted by insects or through contaminated water. In the Marc
Scientific American(四)月
By Lisa Schlein Geneva 23 August 2007 The World Health Organization warns new and emerging infectious diseases are spreading rapidly around the world threatening the health, economies and security of all nations. This year's World Health Report says
2007年VOA标准英语（八月）
Tools to Fight Infectious Diseases Rely on Public Health Programs A simple bite from a mosquito can end someone's life or change it forever. A sneeze, a handshake or even sharing of a desk can do the same thing. That's how H1N1 - or swine flu - sprea
VOA标准英语2012年(十二月)
BEIJING, Aug. 7 (Xinhua) -- Infectious diseases claimed 1,669 lives on the Chinese mainland in July, with AIDS contributing to 70 percent of the deaths, the Ministry of Health (MOH) said Tuesday. A total of 5,552 AIDS cases, which is categorized as a
英语新闻
A recent study found almost 60 percent of surgical residents admitted they had sustained needlestick injuries when they were medical students. Blunt tip needles, such as this one, are considered safer A recent study shows that medical students and ho
VOA标准英语2010年(二月)