标题: [求助]GWD-29-37 [打印本页] 作者: xyloaries 时间: 2010-8-3 14:41 标题: [求助]GWD-29-37 Rabbitswere introduced to Numa Island in thenineteenth century. Overgrazing by theenormous population of rabbits now menaces the island’s agriculture. The government proposes to reduce thepopulation by using a virus that has caused devastating epidemics in rabbitpopulations elsewhere. There is,however, a chance that the virus will infect the bilby, an endangered nativemarsupial. The government’s plan, therefore,may serve the interests of agriculture but will clearly increase the threat tonative wildlife.Which ofthe following, if true, most seriously weakens the argument? A. There is less chance that the virus willinfect domestic animals on Numa than that it will infect bilbies. B. There are no species of animals on theisland that prey on the rabbits. C. Overgrazing by rabbits endangers many of theplants on which bilbies feed. D. The virus that the government proposes touse has been successfully used elsewhere to control populations of rabbits. E. There is no alternative means of reducing therabbit population that would involve no threat to the bilby.