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Recently, the news has been filled with reports of the "bird flu." Asia is o
Recently, the news has been filled with reports of the "bird flu." Asia is o
游客
2024-02-13
45
管理
问题
Recently, the news has been filled with reports of the "bird flu." Asia is on a region-wide health alert, with governments slaughtering millions of chickens to contain outbreaks of the bird flu in Thailand, Vietnam, Cambodia, South Korea, Japan and China.
Influenza—commonly called "flu"—is one of the oldest and most common diseases known to man. It can also be one of the deadliest. The great "Spanish flu" pandemic(传染病) of 1918-1919 was considered the worst plague in history, killing up to 40 million people with half of the world’s population infected in only a few months.
Influenza can also infect many different warm-blooded animals, such as birds. However, the "flu" virus usually develops different variants that are specialized for each species of animal that they infect. Cross species infections are rare.
A flu strain called influenza A(H5N1) appears to have made a successful jump from birds to humans. The viral strain(病毒株) was first isolated from, South African birds in 1961. The first known human infection occurred in a Hong Kong child in May of 1997. By the end of 1997, there were 13 confirmed cases and four deaths, all in Hong Kong. In an attempt to stop the spread of the disease, Hong Kong authorities ordered the slaughter of all chickens, ducks, geese, and domestic pigeons.
Human infected with H5N1 so far are thought to have caught the disease from fowl and no person-to-person transmissions have been reported. The World Health Organization, however, feats that the bird flu is highly adaptable and might leap the species barrier. It says anyone exposed to the disease should be isolated to avoid contact with sufferers of regular human influenza.
选项
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
答案
B
解析
细节题。由题干中的recent一词可知此题对应由Recently领起的第一段。第一段中...with governments slaughtering millions of chickens to contain outbreaks of the bird flu可充分证明B是正确的。A错在millions。C在文中并末提到。D错在exaggerated(夸张的)。
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