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题库 / Prep2012-RC-52
White tigers are neither a species nor a subspecies, but appear as a result of a recessive trait that rarely occurs in the wild. In the 1950s many zoos deliberately and indiscriminately bred white tigers, but more recently, concerns about the desirability of preserving a trait that presumably hinders tigers' to survive in the wild, and recognition that inbreeding could lead to genetic defects, have caused most zoos to such practices. However, some zoo managers argue that the popularity of white tigers provides income important to the survival of zoo sponsored scientific and conservation programs. They also point out that most of the white tigers captured in the wild were adults, proving that their coloration does not hinder their survival ability.
Opponents of white-tiger breeding programs argue that white tigers are merely Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened, thus preventing the Chinese and Indochinese tiger subspecies from joining the Javan, Balinese, and Caspian subspecies in extinction. Alternatively, zoos could mingle the subspecies and manage all tigers in captivity as one species. Although subspecies differences would be lost, this strategy would be advantageous because fewer animals would be necessary to maintain the genetic diversity of tigers in captivity, making scarce zoo resources available for housing other endangered felines.
The passage suggests that, compared with other tiger subspecies, the Indian tiger is
less threatened by extinction
less readily bred in captivity less
likely to survive in the wild
more likely to be bred indiscriminately
more popular with zoo visitors
此讲解的内容由AI生成，还未经人工审阅，仅供参考。
正确答案是 A。文章暗示了比其他老虎亚种而言，印度老虎不太受到灭绝威胁。文章称，一些动物园管理人员认为，白色老虎的普及为动物园提供了重要的收入，以支持动物园赞助的科学和保护计划，但是，反对繁育白色老虎的计划的人认为，白色老虎只是印度老虎-一个在野外和动物园中都很常见的亚种，因此，动物园应该把老虎管理工作重点放在保护受威胁亚种上，以防止中国和印度支那老虎亚种加入爪哇、巴厘岛和里海亚种的濒危行列。由此可见，与其他老虎亚种相比，印度老虎不太受到灭绝威胁，因此，本题的正确答案是 A。
破折号内容常考+后面取非
white tigers are merely Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened
破折号内容常考+后面取非，很善良了
white tigers are merely Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened
Opponents of white-tiger breeding programs argue that white tigers are merely Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened
反对者认为白虎仅仅是Indian tigers，而动物园应该将老虎保护放在那些生存遭到威胁的subspecies。-> indian tigers的生存没有遭到威胁
破折号内容常考+后面取非
没看全选项，错选c
fewer animals would be necessary to maintain the genetic diversity of tigers in captivity
这句话没太看懂，是“很少的动物保存 diversity of tigers in captivity就够了”吗？？？
第二段，反对者提出，white tiger仅出现在印度虎中，zoo该做的是保护濒临灭绝的亚种，防止chinese虎和indochinese虎（数量相对较少的亚种）加入另外三个灭绝亚种的队伍。或者，zoo可以把所有亚种关在一起饲养。这样做尽管亚种间的不同点会消失，却是有好处的，因为fewer animals would be necessary to maintain the genetic diversity of tigers in captivity，还可以腾出资源给其他濒危猫科动物。
第一段：White tigers不是种也不是亚种，只是隐性基因的产物，且在野外很少产生。1950s，动物园故意且不加区分地培育White tigers，但最近，关于“the desirability of preserving a trait that presumably hinders tigers' to survive in the wild”的concern，以及关于“inbreeding could lead to genetic defects”的recognition，have caused most zoos to (疑似缺了一个动词？？？) such practices. however转话题，zoo经理认为white tiger吸引游客挣到的钱才能保证科研与保护的费用，并指出在野外捕获的white tiger都是成年的，说明颜色不会影响他们的成活率。
Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened,
argue说动物园应该努力保护濒危的物种，言外之意就是indian tiger不濒危
文章第二段第一句，用破折号隔开了，不过我们可以看到句子主干，argue后面有一个平行，i.e.白虎只是印度虎的亚种//动物园SHOULD把努力都用来保护那些濒危的动物。也就是说什么呢，就是印度虎不濒危。
a subspecies well represented in both zoos and the wild 在动物园和野生都活的很好的物种，当然less threatened by extinction
很精妙的答案设计，只可意会不可言传
tigers are merely Indian tigers—a subspecies well represented in both zoos and the wild—and that zoos should focus their tiger management efforts on preserving subspecies whose existence is threatened
merely只是，仅仅