GWD-9-Q12:
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，不明白是什么意思？？为什么能成为原文的假设？
用排除法可以选A，A的意思是提早接触疟疾能够产生抗体，避免日后更严重的致命疟疾。GWD-9-Q28:
Editorial in Krenlandian Newspaper:
Krenland’s steelmakers are losing domestic sales because of lower-priced imports, in many cases because foreign governments subsidize their steel industries in ways that are banned by international treaties. But whatever the cause, the cost is ultimately going to be jobs in Krenland’s steel industry. Therefore, it would protect not only steel companies but also industrial employment in Krenland if our government took measures to reduce cheap steel imports.
Which of the following, if true, most seriously weakens the editorial’s argument?
A. Because steel from Krenland is rarely competitive in international markets, only a very small portion of Krenlandian steelmakers’ revenue comes from exports.
B. The international treaties that some governments are violating by giving subsidies to steelmakers do not specify any penalties for such violations.
C. For many Krenlandian manufacturers who face severe international competition in both domestic and export markets, steel constitutes a significant part of their raw material costs.
D. Because of advances in order-taking, shipping, and inventory systems, the cost of shipping steel from foreign producers to Krenland has fallen considerably in recent years.
E. Wages paid to workers in the steel industry in Krenland differ significantly from wages paid to workers in many of the countries that export steel to Krenland.
答案选C，我没有弄明白题目中的几个概念，manufacturer和steelmakers 以及steel industries 是一个概念吗？C的逻辑是什么？我选的是D
C的逻辑是K国钢铁业的主要问题是原材料成本过高，也就是说并不是冗员或者高工资问题导致K国钢铁业的困境。因此K国钢铁业不景气不会导致工人下岗或者降薪。
D选项是说近年来进口钢材价格大幅下跌，strengthen而非weaken题目。谢谢大家了！~~
-- by 会员 水色青空 (2010/2/17 13:01:56)