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标题: GWD19-12求教 [打印本页]

作者: shaoji 时间: 2006-1-6 00:58
标题: GWD19-12求教

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?

Early exposure to malaria increases the body’s resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.

Mosquito bites can transmit to people diseases other than malaria.

Mosquito nets provide protection from some insect pests other than mosquitoes.

Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.

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.我选了C,都不是很喜欢.但是A想不通，求教！

作者: shaoji 时间: 2006-1-6 16:03

作者: jjll 时间: 2006-1-6 17:12
A说的是被蚊子咬的好处。所以不推荐是用蚊帐啊。

作者: shaoji 时间: 2006-1-6 21:27

想明白了,这里是说早点得这个病比较好,因为以后得可能会危急生命,所以小孩子不建议用蚊帐.就好像水痘小时候得了就终生免疫,但是小时候没得,大了得了就危险了,呵呵就像前阵子身边有人得水痘,吓死我了...

作者: jjll 时间: 2006-1-9 13:26
没错。

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