2. 外语
  3. Human-caused disturbances, such as habitat destruction and the introduction of nonnative species, are among the leading causes o

Human-caused disturbances, such as habitat destruction and the introduction of nonnative species, are among the leading causes o

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问题 Human-caused disturbances, such as habitat destruction and the introduction of nonnative species, are among the leading causes of plant and animal population declines. Most populations are affected by a combination of adverse human pressures, each of which is in itself insufficient to (i)________a population crash. Therefore, studies of population declines that (ii)________individual factors and thus (iii)________potential interactions may lead to improper management of declining species.
Blank (i)  Blank (ii)   Blank (iii)
A. delay   D. integrate G. exaggerate
B. trigger E. focus on  H. overlook
C. offset  F. ignore    I. anticipate
选项
答案B,E,H
解析 通读题干，并不是很难理解。首先来解决空格(i)，前半句在说，大多数种群是受到各种不利的人类压力组合的影响(ale affected by a combination of adverse human pressures)，这些人类压力中任何一个都不足以去怎么样种群的崩溃(a population crash)。既然前面说了这是综合作用的结果，所以任何单一因素都不足以去产生这种影响，因此空格(i)应当选择B项trigger。由于thus的作用，空格(ii)和空格(iii)是因果关系。他们共同的结果是可能会导致对于物种减少的不合适的处理，所以这里结合空格(i)所在句子，我们知道造成这种不好结果的一定是他们忽视了combination，而单纯强调individual factors，所以空格(ii)应当选择E项focus on，空格(iii)表示对于potential interactions的作用，所以选择H项overlook。
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