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  3. The threat of a global outbreak of bird flu makes it urgent for the international community to cooperate effectively. Wealthy co

The threat of a global outbreak of bird flu makes it urgent for the international community to cooperate effectively. Wealthy co

admin2009-08-13  50
问题     The threat of a global outbreak of bird flu makes it urgent for the international
community to cooperate effectively. Wealthy countries will have to provide
hundreds of millions of dollars for the testing and production of medicines
unnecess ary for treating patients suffering from bird flu. Developing countries,          【B1】 ______
particularly in Southeast Asia, which the bird flu virus has spread since 1997, must       【B2】 ______
work out special programs so that farmers will not hide signs of possible
out-breaks. However, the way such farm birds as chickens and ducks are traditionally       【B3】 ______
raised and marketed in the developed world should be changed; there should                 【B4】 ______
be more distance between the birds and their keepers. Countries should deal in             【B5】 ______
the disease with joint effort.
    The potential effects of a national breakout of bird flu are enormous. Firstly,
the breakout may kill large numbers of people. Secondly, such an outbreak                  【B6】 ______
may cause great political damage. The latest outbreak of bird flu has cost Southeast       【B7】 ______
east Asia more than $10 billion. If a new outbreak of bird flu were to last for a
whole year, $800 billion would be lost.
    Despite the 124 human cases and 63 deaths from bird flu since December
2003, the virus remains mainly a disease of animals. However, the more animals
that die the disease, the more chances it has of spreading to people. Large                【B8】 ______
numbers of dead pr dying birds mean that more people will be exposing to the virus,        【B9】 ______
which will change into a virus with new characteristics. If the international
community works together efficiently, man can surely prevent from such a virus and         【B10】 ______
possibly save millions of lives.
选项
答案unnecessary→necessary
解析 本题属于语义衔接错误。此句解释了富裕国家的职责，即提供上亿美元对那些能够治疗感染禽流感病人的药物进行试验和生产。句中的unnecessary不符合该处衔接关系，如果药物对于治疗感染禽流感的病人无关紧要的话，那么发达国家也就没有必要花费上亿资金进行药物试验及生产了，故此处改成相反的necessary(必要的)。
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