摘要: When a strain of influenza with pandemic potential struck in April, it was generally referred to as swine flu .Now,the name is A/H1N1 that has killed many people in the wold.A/H1N1 is a new flu that
(来源:文章屋网 www.wzu.com)
摘要: When a strain of influenza with pandemic potential struck in April, it was generally referred to as swine flu .Now,the name is A/H1N1 that has killed many people in the wold.A/H1N1 is a new flu that
(来源:文章屋网 www.wzu.com)