疑惑，，求解，TKS

何小媛159753

The population of elephant seals,reduced by hunting to perhaps a few dozen animals early in this century,has soared under federal protection during the last few decades.However,because the species repopulated itself through extensive inbreeding,it now exhibits a genetic uniformity that is almost unparalleled in other species of mammals,and thus it is in far greater danger of becoming extinct than are most other species.
Given the information in the passage above,which of the following is most likely the reason that other species of mammals are less likely that elephant seals to become extint?
(A)Other species of mammals have large populations,so the loss of a few members of the species is not significant.
(B)Other species of mammals have increased their knowledge of dangers through the experience of generation after generation of animals.
(C)In other species of mammals,hunters can readily distinguish between males of between young animals and adults.
(D)In other species of mammals,some members of the species are genetically better equipped to withstand a disease or event that destroys other members of the species.
(E)Other species of mammals have retained habits of caution and alertness because they have not been protected as elephant species.

答案是D，但我觉得E也能削弱啊，请高手指点小女子~

fanaf821

我觉得对于这道题，最简洁有效的应该使用排除法
题干中given the information in the passage above 明确指出了选项中的信息应来自于原文，即含非原文信息的均为错误选项
虽然e具有一定的可能性，但文中没有提及关于任何habit对于extinction的影响，所以只能作为无关选项排除
所谓结论题，就是从上到下，而不是从下到上，看选项是否能支持原文
如有不对，还请指出=）

何小媛159753

我觉得对于这道题，最简洁有效的应该使用排除法
题干中given the information in the passage above 明确指出了选项中的信息应来自于原文，即含非原文信息的均为错误选项
虽然e具有一定的可能性，但文中没有提及关于任何habit对于extinction的影响，所以只能作为无关选项排除
所谓结论题，就是从上到下，而不是从下到上，看选项是否能支持原文
如有不对，还请指出=）

-- by 会员 fanaf821 (2011/7/23 10:24:07)

 我觉得你说的有一定道理，但我还是有几点困惑：
虽然e具有一定的可能性，但文中没有提及关于任何habit对于extinction的影响————但是文中不是提到了大象被保护吗？
文中没有提及关于任何habit对于extinction的影响，但也没有说基因对灭绝的影响啊。

fanaf821

虽然e具有一定的可能性，但文中没有提及关于任何habit对于extinction的影响————但是文中不是提到了大象被保护吗？
文中没有提及关于任何habit对于extinction的影响，但也没有说基因对灭绝的影响啊。

-- by 会员 何小媛159753 (2011/7/23 11:17:19)

[/quote]

The population of elephant seals,reduced by hunting to perhaps a few dozen animals early in this century,has soared under federal protection during the last few decades.
文中的确提到了大象被保护，我是这样理解的，e选项中更强调一种由于被保护而产生了一种habit 使得这个物种没有灭绝，主观原因导致结果
但是文中只是陈述了这样一个客观事实——被保护，那么大象没有灭绝存在多种可能性，可能是e选项中说的develop a habit，当然也可能是由于猎人被赶尽杀绝了（这个例子比较极端，只想说明在原文没有rule out all the possibility的时候，一切皆有可能）
e选项的错误应该属于办法的多样性：由采取行动不一定能得出采取特定的行动

However,because the species repopulated itself through extensive inbreeding,it now exhibits a genetic uniformitythat is almost unparalleled in other species of mammals,and thus it is in far greater danger of becoming extinct than are most other species.
文中的逻辑链就是基因的不同导致灭绝，所以正确答案由此得出

何小媛159753

好详细，太感动了！！！
突然发现文中主要强调的是大象，而E强调的是别的动物，就算别的动物警惕性高了也不能说明大象就更容易灭绝了~