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托福阅读词汇题:Formation

2015-08-11 15:52:29来源:网络

  【托福阅读题型:Formation词汇题】托福阅读中词汇题是重要题型之一。根据托福阅读题型不同来进行专项练习,是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

  查看全部:托福阅读题型分类练习之词汇题

  托福阅读词汇题:Formation

  【Paragraph 5】There is little doubt, however, that desertification in most areas results primarily from human  activities rather than natural processes. The semiarid lands bordering the deserts exist in a delicate ecological balance  and are limited in their potential to adjust to increased environmental pressures. Expanding populations are subjecting the land to increasing pressures to provide them with food and fuel. In wet periods, the land may be able to respond to these stresses. During the dry periods that are common phenomena along the desert margins, though, the pressure on the land is often far in excess of its diminished capacity, and desertification results. (Desert Formation)

  The word “delicate” in the passage is closest in meaning to

  ○fragile

  ○predictable

  ○complex

  ○valuable

  答案见下一页:

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