托福阅读备考练习的时候,对于真题的模拟练习,是自我检查的最好方法,同时也能够让我们更好的了解托福阅读考试,做好练习。具体的这些模拟真题内容是什么呢?下面小编为大家整理了详细的内容,供大家参考!

  The geology of the Earth's surface is dominated by the particular properties of water. Present on Earth in solid, liquid, and gaseous states, water is exceptionally reactive. It dissolves, transports,and precipitates many chemical compounds and is constantly modifying the face of the Earth.

  Evaporated from the oceans, water vapor forms clouds, some of which are transported by wind over the continents. Condensation from the clouds provides the essential agent of continental erosion: rain. Precipitated onto the ground, the water trickles down to form brooks, streams, and rivers, constituting what are called the hydrographic network. This immense polarized network channels the water toward a single receptacle: an ocean. Gravity dominates this entire step in the cycle because water tends to minimize its potential energy by running from high altitudes toward the reference point, that is, sea level.

  The rate at which a molecule of water passes though the cycle is not random but is a measure of the relative size of the various reservoirs. If we define residence time as the average time for a water molecule to pass through one of the three reservoirs — atmosphere, continent, and ocean — we see that the times are very different. A water molecule stays, on average, eleven days in the atmosphere, one hundred years on a continent and forty thousand years in the ocean. This last figure shows the importance of the ocean as the principal reservoir of the hydrosphere but also the rapidity of water transport on the continents.

  A vast chemical separation process takes places during the flow of water over the continents. Soluble ions such as calcium, sodium, potassium, and some magnesium are dissolved and transported. Insoluble ions such as aluminum, iron, and silicon stay where they are and form the thin, fertile skin of soil on which vegetation can grow. Sometimes soils are destroyed and transported mechanically during flooding. The erosion of the continents thus results from two closely linked and interdependent processes, chemical erosion and mechanical erosion. Their respective interactions and efficiency depend on different factors.

  托福阅读题目:

  1. The word "modifying" in line 4 is closest in meaning to

  (A) changing

  (B) traveling

  (C) describing

  (D) destroying

  2. The word "which" in line 5 refers to

  (A) clouds

  (B) oceans

  (C) continents

  (D) compounds

  3.According to the passage , clouds are primarily formed by water

  (A) precipitating onto the ground

  (B) changing from a solid to a liquid state

  (C) evaporating from the oceans

  (D) being carried by wind

  4. The passage suggests that the purpose of the "hydrographic network" (line 8) is to

  (A) determine the size of molecules of water

  (B) prevent soil erosion caused by flooding

  (C) move water from the Earth's surface to the oceans

  (D) regulate the rate of water flow from streams and rivers

  5. What determines the rate at which a molecule of water moves through the cycle, as discussed in

  the third paragraph?

  (A) The potential energy contained in water

  (B) The effects of atmospheric pressure on chemical compounds

  (C) The amounts of rainfall that fall on the continents

  (D) The relative size of the water storage areas

  6. The word "rapidity" in line 19 is closest in meaning to

  (A) significance

  (B) method

  (C) swiftness

  (D) reliability

  7. The word "they" in line 24 refers to

  (A) insoluble ions

  (B) soluble ions

  (C) soils

  (D) continents

  8.All of the following are example of soluble ions EXCEPT

  (A) magnesium

  (B) iron

  (C) potassium

  (D) calcium

  9. The word "efficiency" in line 27 is closest in meaning to

  (A) relationship

  (B) growth

  (C) influence

  (D) effectiveness

  托福阅读答案:

  AACCD CABD

  以上就是关于“托福阅读理解真题整理”的内容,希望通过上述内容的学习,大家能够更好的备考托福阅读考试,取得高分成绩。


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