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托福阅读句子简化题:the Ogallala Aquifer

2015-08-11 15:04:04来源:网络

  【托福阅读题型:the Ogallala Aquifer句子简化题】托福阅读中句子简化题是重要题型之一。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句子简化题

  托福阅读句子简化题:the Ogallala Aquifer

  【Paragraph 2】The Ogallala aquifer is a sandstone formation that underlies some 583,000 square kilometers of land extending from northwestern Texas to southern South Dakota. Water from rains and melting snows has been accumulating in the Ogallala for the past 30,000 years. Estimates indicate that the aquifer contains enough water to fill Lake Huron, but unfortunately, under the semiarid climatic conditions that presently exist in the region, rates of addition to the aquifer are minimal, amounting to about half a centimeter a year.(Depletion of the Ogallala Aquifer)

  Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.

  ○Despite the current impressive size of the Ogallala aquifer, the region’s climate keeps the rates of water additionvery small.

  ○Although the aquifer has been adding water at the rate of only half a centimeter a year, it will eventually accumulate enough water of fill Lake Huron.

  ○Because of the region’s present climatic conditions, water is being added each year to the aquifer.

  ○Even when the region experiences unfortunate climatic conditions, the rates of addition of water continue toincrease.

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