※ 引述《vincactusi (吸)》之铭言： : 2.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 hunter, 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? : 答案是B. : It has been many years since the restriction led to the hunting season for : snow geese being closed earlier than the scheduled date. : 我不懂为什麽? 这一题我也觉得很奇怪，B看起来像是支持结论的答案 还请高人指点.. A: Hunting limits for snow geese were imposed many years ago in response to a sharp decline in the population of snow geese. B: It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date. C: The number of snow geese taken by hunters each year has grown every year for several years. D: As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons. E: In the snow goose’s winter habitats, the goose faces no significant natural predation. ※ 编辑: GODDAMN 来自: 61.224.49.69 (10/31 07:43)