单项选择题

H5N1 is a flu strain ______.

A．limited to Hong Kong
B．which first affected human beings in 1961
C．crossing species barriers
D．which was first isolated from American birds
<上一题 目录 下一题>
热门 试题

单项选择题
What should be done in order to stop the spread of bird flu
A．All infected fowls have to be slaughtered.
B．The government should isolate all the flu patients.
C．No fowl should be raised from then on.
D．Specialized hospitals should be established.
单项选择题
The recent outbreak of bird flu results in______.
A．the death of millions of people
B．the slaughter of a lot of chickens
C．a worldwide panic
D．too many exaggerated news reports
相关试题