2. 外语
  3. David: Since attempting to preserve every species that is currently endangered is prohibitively expensive, the endangered specie

David: Since attempting to preserve every species that is currently endangered is prohibitively expensive, the endangered specie

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问题 David: Since attempting to preserve every species that is currently endangered is prohibitively expensive, the endangered species whose value to humanity is the greatest should be accorded the highest priority for preservation. Karen: Such a policy would be unsound because it is impossible to predict the future value of a species, nor is it always possible to assess the present value of species whose contributions to humanity, though significant, are indirect. Which of the following is the main point of Karen’ s reply to David?
选项 A、Although it would be desirable to preserve all endangered species, doing so is not economically feasible.
B、Even if the value to humanity of a given species is known, that value should not be a factor in any decision on whether to expend effort to preserve that species.
C、Species whose contributions to humanity are direct should have a higher priority for preservation efforts than species whose contributions to humanity are only indirect.
D、Since the methods for deciding which species have the most value to humanity are imperfect, informed decisions cannot be made on the basis of the assessment of such value.
E、The preservation of endangered species whose value to humanity can be reliably predicted is more important than the preservation of species whose value for humanity is unpredictable.
答案D
解析 本题属于二人对话类的逻辑应用与技法题型，让我们寻求描述Karen针对David的回答要点的一个选项，因此读题重点应放在第二人Karen上。(D)选项很好地描述Karen的回答，所以(D)正确；(A)为David想表述的意思；(B)与“未来价值”无关；(C)、(E)都为新的比较，必然不对。
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