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A mosquito bite can transmit to a person the parasite that causes malaria, and the use of mosquito nets over children's beds can significantly reduce the incidence of malarial infection for children in areas where malaria is common. Yet public health officials are reluctant to recommend the use of mosquito nets over children's beds in such areas.

Which of the following, if true, would provide the strongest grounds for the public health officials' reluctance?

正确答案: A

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楼主
发表于 2010-2-18 13:13:07 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
A mosquito bite can transmit to a person the parasite that causes malaria, and the use of mosquito nets over children’s beds can significantly reduce the incidence of malarial infection for children in areas where malaria is common. Yet public health officials are reluctant to recommend the use of mosquito nets over children’s beds in such areas.
Which of the following, if true, would provide the strongest grounds for the public health officials’ reluctance?

A.    Early exposure to malaria increases the body’s resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.
B.    Mosquito bites can transmit to people diseases other than malaria.
C.    Mosquito nets provide protection from some insect pests other than mosquitoes.
D.    Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.
E.    The pesticides that are most effective against mosquitoes in regions where malaria is common have significant detrimental effects on human health.

答案是A。。。想问一下为什么E不对。。。
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沙发
 楼主| 发表于 2010-2-18 13:15:19 | 只看该作者
是说E中的杀虫剂不是指原文的mosquito nets吗??
板凳
 楼主| 发表于 2010-2-18 13:19:20 | 只看该作者
知道了。。。。那是蚊帐。。。做题做晕了。。见笑
地板
发表于 2010-2-18 13:21:09 | 只看该作者
呵呵,刚刚看到,以为好容易有出手机会:)
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