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三立在线托福模考阅读TPO1-35文本+音频资料

2015-07-01 16:45 三立在线 lvshuang

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摘要:今天小编针对托福阅读部分为大家带来三立在线托福模考阅读TPO1-35文本+音频资料,各位考生是不是很需要呢?这可是三立在线TPO重量级别的资料哦,小编为大家整理好,希望对各位考生有所帮助。

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  托福阅读考试的备考是非常艰苦的,那么托福TPO成了托福阅读考试的福音,今天小编为大家带来的资料是三立在线托福模考阅读TPO1-35文本+音频资料,我们一起来看看吧。

  Paragraph 6: Thus a proportion of the total volume of any sediment, loose or cemented, consists of empty space. Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous. Paragraph 7: The proportion of empty space in a rock is known as its porosity. But note that porosity is not the same as permeability, which measures the ease with which water can flow through a material; this depends on the sizes of the individual cavities and the crevices linking them.

  10. According to paragraphs 6 and 7, why is basalt unlike most crystalline forms of rock?

  ○It is unusually solid

  ○It often has high porosity.

  ○It has a low proportion of empty space.

  ○It is highly permeable.

  11. What is the main purpose of paragraph 7?

  ○To explain why water can flow through rock

  ○To emphasize the large amount of empty space in all rock

  ○To point out that a rock cannot be both porous and permeable

  ○To distinguish between two related properties of rock

  Paragraph 9: The relative amount of these two kinds of water varies greatly from one kind of rock or sediment to another, even though their porosities may be the same. What happens

  depends on pore size. If the pores are large, the water in them will exist as drops too heavy for surface tension to hold, and it will drain away; but if the pores are small enough, the water in them will exist as thin films, too light to overcome the force of surface tension holding them in place; then the water will be firmly held.

  12. 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.

  ○Surface tension is not strong enough to retain drops of water in rocks with large pores but it strong enough to hold on to thin films of water in rocks with small pores.

  ○Water in rocks is held in place by large pores and drains away from small size pores through surface tension.

  ○Small pores and large pores both interact with surface tension to determine whether a rock will hold water as heavy drops or as a thin film.

  ○If the force of surface tension is too weak to hold water in place as heavy drops, the water will continue to be held firmly in place as a thin film when large pores exist.

  Paragraph 8: Much of the water in a sample of water-saturated sediment or rock will drain from it if the sample is put in a suitable dry place.█ But some will remain, clinging to all solid surfaces.█ It is held there by the force of surface tension without which water would drain instantly from any wet surface, leaving it totally dry.█ The total volume of water in the saturated sample must therefore be thought of as consisting of water that can, and water that cannot, drain away.█

  以上就是小编介绍的这份三立在线托福模考阅读TPO1-35文本+音频资料的部分简单介绍,大家可以根据自己的需要进行免费的下载,希望对大家有所帮助。

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