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Wild and farm birds often get a flu virus. Yet they usually are able to carry the virus without getting sick. In 1997 six pe
Wild and farm birds often get a flu virus. Yet they usually are able to carry the virus without getting sick. In 1997 six pe
admin
2011-05-26
36
问题
Wild and farm birds often get a flu virus. Yet they usually are able to carry the virus without getting sick.
In 1997 six people in Hong Kong died of a different kind of bird flu virus. It is called the h-five-n-one virus. The Hong Kong government quickly ordered the killing of all farm birds there. That stopped the spread of h-five-n-one to people in Hong Kong.
Yet the virus bad already spread to other parts of Asia. It was found in 16 countries between 2003 and 2006.
The h-five-n-one virus first appeared in Africa. This raised many concerns about the spread of the disease. Scientists do not know exactly how bird flu came to Africa. At first, they thought wild birds were to blame. Now, officials with the U. N. Food and Agriculture Organization believe the main cause is trade in farm birds.
The bird flu virus is found in the waste and liquids of infected birds. The virus spreads when healthy birds or people touch sick birds or nay infected (被感染了的) part of sick birds. Right now, the virus is not spreading among person to person. But the virus could change and start spreading among people. Health officials believe that it is even more possible now that bird flu has spread in Africa, and that is why international organizations are working so hard to stop its spread.
The best way to stop the spread of bird flu is to kill all the chickens in an area where bird flu has been discovered. More than 145 000 chickens have been killed in Nigeria since bird fin was first found one year ago.
H-live-n-one virus in the passage means ______.
选项
A、farm birds
B、infected farm animals
C、people died in Hong Kong
D、a different kind of bird flu virus
答案
D
解析
此题考查文章句意理解、细节定位。略读文章,发现在第2段中有a different kind of bird flu virus.It is called the h-five-n-one virus。注意其中的代词it,它代表a different kind of bird flu virus,故选D为答案。
转载请注明原文地址:https://kaotiyun.com/show/jnlC777K
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