The World Health Organization reported two new human cases of bird flu on Wednesday.One patient is recovering in Egypt,while another died in Vietnam—a reminder that the H5N1 virus is far from gone.
语篇解读:禽流感刚刚告一段落,人类却又迎来了猪流感——甲型H1N1流感。禽流感不在人与人之间传播,而甲型H1N1流感通过打喷嚏和与人握手就可以传播。如今科学家们担心的是:要是两种病毒混合变异产生新的病毒会怎么样呢?
5.What's the main idea of the passage?
A.The warning of the mixture of swine flu and bird flu.
B.The brief introduction of swine flu.
C.The brief introduction of bird flu.
D.The difference between swine flu and bird flu.
解析:主旨大意题。由文中第一段最后一句“...what happens if they mix?”可知A项正确。B、C、D三项都是文章中的一部分,范围小了。
答案:A
6.What does the underlined word in the second paragraph refer to?
A.The danger of bird flu.
B.The danger of swine flu.
C.This possibility of the new swine flu strain.
D.The two viruses meet and combine.
解析:推理判断题。由文中第二段可知D正确。
答案:D
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