【官方真题Official托福阅读】官方真题Official3托福阅读词汇真题练习——particular&final

小站整理2015-11-19 13:17:37

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摘要：在托福阅读的过程中，如果想要提升自己的阅读能力，方法的学习是非常重要的环节。那么，在以下的内容中，我们就为大家介绍官方真题Official3托福阅读词汇真题练习，希望能为大家的备考带来帮助

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Paragraph 5: Even the kind of stability defined as simple lack of change is not always associated with maximum diversity. At least in temperate zones, maximum diversity is often found in mid-successional stages, not in the climax community. Once a redwood forest matures, for example, the kinds of species and the number of individuals growing on the forest floor are reduced. In general, diversity, by itself, does not ensure stability. Mathematical models of ecosystems likewise suggest that diversity does not guarantee ecosystem stability—just the opposite, in fact. A more complicated system is, in general, more likely than a simple system to break down. A fifteen-speed racing bicycle is more likely to break down than a child’s tricycle. 【官方真题Official3- The Long-Term Stability of Ecosystems】

8. The word “guarantee” in the passage is closest in meaning to

○increase

○ensure

○favor

○complicate

答案：(3)

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