还没有登录哦！
[Reading Comprehension]
试题详情
文章：
| Line | There are recent reports of apparently drastic |
| declines in amphibian populations and of extinctions | |
| of a number of the world’s endangered amphibian | |
| species. These declines, if real, may be signs of a | |
| (5) | general trend toward extinction, and many |
| environmentalists have claimed that immediate | |
| environmental action is necessary to remedy | |
| this “amphibian crisis,” which, in their view, is an | |
| indicator of general and catastrophic environmental | |
| (10) | degradation due to human activity. |
| To evaluate these claims, it is useful to make a | |
| preliminary distinction that is far too often ignored. | |
| A declining population should not be confused with | |
| an endangered one. An endangered population is | |
| (15) | always rare, almost always small, and, by definition, |
| under constant threat of extinction even without a | |
| proximate cause in human activities. Its disappearance, | |
| however unfortunate, should come as no great | |
| surprise. Moreover, chance events—which may | |
| (20) | indicate nothing about the direction of trends in |
| population size—may lead to its extinction. The | |
| probability of extinction due to such random factors | |
| depends on the population size and is independent of | |
| the prevailing direction of change in that size. | |
| (25) | For biologists, population declines are potentially |
| more worrisome than extinctions. Persistent | |
| declines, especially in large populations, indicate a | |
| changed ecological context. Even here, distinctions | |
| must again be made among declines that are only | |
| (30) | apparent (in the sense that they are part of habitual |
| cycles or of normal fluctuations), declines that take | |
| a population to some lower but still acceptable | |
| level, and those that threaten extinction (e.g., by | |
| taking the number of individuals below the minimum | |
| (35) | viable population). Anecdotal reports of population |
| decreases cannot distinguish among these | |
| possibilities, and some amphibian populations have | |
| shown strong fluctuations in the past. | |
| It is indisputably true that there is simply not | |
| (40) | enough long-term scientific data on amphibian |
| populations to enable researchers to identify real | |
| declines in amphibian populations. Many fairly | |
| common amphibian species declared all but extinct | |
| after severe declines in the 1950s and 1960s | |
| (45) | have subsequently recovered, and so might |
| the apparently declining populations that have | |
| generated the current appearance of an amphibian | |
| crisis. Unfortunately, long-term data will not soon | |
| be forthcoming, and postponing environmental | |
| (50) | action while we wait for it may doom species and |
| whole ecosystems to extinction. |
题目：
Which of the following most accurately describes the organization of the passage?
选项:
A、A question is raised, a distinction regarding it is made, and the question is answered.
B、An interpretation is presented, its soundness is examined, and a warning is given.
C、A situation is described, its consequences are analyzed, and a prediction is made.
D、Two interpretations of a phenomenon are described, and one of them is rejected as invalid.
E、Two methods for analyzing a phenomenon are compared, and further study of the phenomenon is recommended.
答案:
B
提问：
选择的是C，不是很懂这类题如何去做啊？
解答：
点赞0
阅读3698
提问：
请老师解释一下这道题 特别是c选项为什么不对。我反复读了文章和og的答案觉得还是不能说服我。另外请老师再给个这种题的做题方法
解答：
点赞0
阅读3297
提问：
关于阅读基础课的疑问，麻烦张慧雯老师回答一下，谢谢~
解答：
点赞0
阅读3467
提问：
我想问下这篇文章最后一句的理解，作者说过获得不到长期数据，而推迟环境行动会使得物种和生态系统遭受灭顶之灾。 推迟行动会使物种灭亡，这是作者给出的警告，既然推迟行动有这么大的危害，那不应该更应该采取环境行动吗，感觉又与第一段环境学家的观点吻和了。 我读作者一直在说有许多declines我们区分不了，因此不能草率地直接去行动。最后一句让我很糊涂。 请老师帮忙指正下，谢谢
解答：
点赞0
阅读3633
提问：
选择的是C，不是很懂这类题如何去做啊？
解答：
点赞0
阅读3699
问个问题
注册太麻烦？点这里查看免费答疑吧！
博币不足
加"GMAT小百科"小智微信
直接送200
