GWD17-Q11 Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species. Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates. Clearly, dropping this restriction would allow the other species to recover. Which of the following, if true, most seriously undermines the argument?
Which of the following, if true, most seriously undermines the argument? B. It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.
B. It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date. D. As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons. 应该是B。楼上的同学们翻译得是对的,但是要理解:其实每年雪鹅的数目都达到了规定的下降5%的额度(所以提早结束了);但是雪鹅数目的下降并不是the other species to recover的必要充分条件;也就是说无论取消不取消额度限制,都不能肯定造成recover的结果,所以是削弱。而D里面的wintergrounds是无关项,一看就不能选。 |