[单项选择]The deadly bird flu so far has claimed a confirmed 18 lives in Vietnam and Thailand, though the suspected toll is higher at 23. Millions of birds have been culled across Asia in an effort to stop the spread of the disease. The U.N. health agency said that testing of virus material from a 23-year-old Vietnamese woman who died of the HSN1 avian flu virus showed no human transmission. The woman and her 30-year-old sister were confirmed victims of bird flu. Their brother died of a flu-like illness but because his body was cremated (焚化), there was no chance to test for the virus. "WHO has today received the results from a study of virus isolated from a 23-year-old woman who is part of a family cluster in Vietnam under investigation as the first possible instance of human-to-human transmission," the agency said in a statement posted on its Web site. "Virus genetic material from this woman, as for the other case in this cluster, is of avian origin and contains no human influenza genes," it sa
A. the woman got the virus from her sister
B. the woman’s brother was also infected by bird flu
C. the woman is the first instance of confirmed victims
D. there was no evidence of human transmission yet

[单项选择]The deadly bird flu so far has claimed a confirmed 18 lives in Vietnam and Thailand, though the suspected toll is higher at 23. Millions of birds have been culled across Asia in an effort to stop the spread of the disease. The U.N. health agency said that testing of virus material from a 23-year-old Vietnamese woman who died of the HSN1 avian flu virus showed no human transmission. The woman and her 30-year-old sister were confirmed victims of bird flu. Their brother died of a flu-like illness but because his body was cremated (焚化), there was no chance to test for the virus. "WHO has today received the results from a study of virus isolated from a 23-year-old woman who is part of a family cluster in Vietnam under investigation as the first possible instance of human-to-human transmission," the agency said in a statement posted on its Web site. "Virus genetic material from this woman, as for the other case in this cluster, is of avian origin and contains no human influenza genes," it sa
A. virus genetic material from this woman contains human influenza genes
B. the origin of the virus is from bird
C. the woman’s death is caused by her brother
D. the virus can be passed from one person to another

[单项选择]Most viruses that cause swine flu or bird flu are very hard to pass from one human to another: they don’t cause epidemics. Sometimes, however, further changes in genes create a virus that can spread rapidly among humans, and can produce a more severe illness. One reason this illness is more severe is that the virus is so new. The regular flu that comes each year is caused by a regular human influenza virus that often has similarities to the viruses that have caused the nu in years past, so people have some degree of immunity to the latest virus. The unusual swine flu or bird flu viruses that develop the ability for person-to-person spread are so different that people have little or no immunity to them.
What is the main reason that the swine flu is very dangerous to humans
A. That it is fatal and has killed many. B That it has spread to many countries.
C. That people know nothing about it. D. That people have no immunity to it.

[单项选择] Bird Flu: Communicating the Risk The recommendations listed below are grounded in two convictions(信念): that motivating people to start taking bird flu seriously should be a top priority for government health departments, and that risk communication principles provide the best guidance on how to do so. Start where your audience starts. Telling people who believe X that they ought to believe Y naturally provokes resistance. You can’’t ignore X and just say YY-Y-Y-Y. You can’’t simply tell people they’’re wrong. You’’ve got to start where they are, with X, and empathically explain why X seems logical, why it’’s widely believed, why you used to believe it too...and why, surprisingly, Y turns out to be closer to the truth. The biggest barrier to sounding the alarm about bird flu is that it’’s flu usually seen as a ho-hum(漠不关心的) disease. It would help if people stopped calling every minor respiratory infection "a touch of the flu" but that’’s n
A. Y
B. N
C. NG