标题: GWD-29-Q37,谁能解释一下这道题什么意思，谢谢！ [打印本页] 作者: zhangjy 时间: 2010-11-24 09:58 标题: GWD-29-Q37,谁能解释一下这道题什么意思，谢谢！ GWD-29-Q37感谢ryangu619提供，蓝色部分是和原题不同的地方，感谢蒙小灰补充～ Rabbits were introduced to Numa Island in the nineteenth century. The government proposes to reduce the population by using a virus that has caused devastating epidemics in rabbit populations elsewhere. But the virus will have a little（有这个词）infection on the bilby. The government’s plan, therefore, may serve the interests of agriculture but will clearly increase the threat to native wildlife. Which of the following, if true, most seriously weakens the argument?
A. There is less chance that the virus will infect domestic animals on Numa than that it will infect bilbies. B. There are no species of animals on the island that prey on the rabbits. C. Overgrazing by rabbits endangers many of the plants on which bilbies feed.（Answer）
D. The virus that the government proposes to use has been successfully used elsewhere to control populations of rabbits. E. There must be some alternative means of reducing the rabbit population that would involve no threat to the bilby. 作者: sdcar2010 时间: 2010-11-24 10:42 Rabbits were introduced to Numa Island in the nineteenth century. Overgrazing by the enormous population of rabbits now menaces the island’s agriculture. The government proposes to reduce the population by using a virus that has caused devastating epidemics in rabbit populations elsewhere. There is, however, a chance that the virus will infect the bilby, an endangered native marsupial. The government’s plan, therefore, may serve the interests of agriculture but will clearly increase the threat to native wildlife.
Which of the following, if true, most seriously weakens the argument?
A. There is less chance that the virus will infect domestic animals on Numa than that it will infect bilbies. B. There are no species of animals on the island that prey on the rabbits. C. Overgrazing by rabbits endangers many of the plants on which bilbies feed. D. The virus that the government proposes to use has been successfully used elsewhere to control populations of rabbits. E. There is no alternative means of reducing the rabbit population that would involve no threat to the bilby.
Answer C is similar to choosing the lesser of the two devils. Without the virus, the rabbits will overgraze the plants and therefore, bilbies will die. (lose/lose) With the virus, the rabbits will be reduced, the plants might be saved for the bilbies to survive, but the bilbies might be affected. (win/"win" plus a bit of risk) All things considered, answer C weakens the argument that the government's plan "will clearly increase the threat to native wildlife" since without the plan, the wildlife will be harmed; with the plan, the wildlife might be saved.