托福-53及答案解析.doc
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1、托福-53 及答案解析(总分:183.86,做题时间:90 分钟)一、READING(总题数:0,分数:0.00)二、PART (总题数:1,分数:10.40)“The Hydrologic Cycle“ The hydrologic cycle is the transfer of water from the oceans to the atmosphere to the land and back to the oceans. The processes involved include evaporation of water from the oceans; precipitatio
2、n on land; evaporation from land; and runoff from streams, rivers, and subsurface groundwater. The hydrologic cycle is driven by solar energy, which evaporates water from oceans, freshwater bodies, soils, and vegetation . Of the total 1.3 billion km water on Earth, about 97% is in oceans, and about
3、2% is in glaciers and ice caps. The rest is in freshwater on land and in the atmosphere. Although it represents only a small fraction of the water on Earth, the water on land is important in moving chemicals, sculpturing landscape, weathering rocks, transporting sediments, and providing our water re
4、sources. The water in the atmosphere-only 0.001% of the total on Earth-cycles quickly to produce rain and runoff for our water resources. Especially important from an environmental perspective is that rates of transfer on land are small relative to what“s happening in the ocean. For example, most of
5、 the water that evaporates from the ocean falls again as precipitation into the ocean. On land, most of the water that falls as precipitation comes from evaporation of water from land. This means that regional land-use changes, such as the building of large dams and reservoirs, can change the amount
6、 of water evaporated into the atmosphere and change the location and amount of precipitation on land-water we depend on to raise our crops and supply water for our urban environments. Furthermore, as we pave over large areas of land in cities, storm water runs off quicker and in greater volume, ther
7、eby increasing flood hazards. Bringing water into semi-arid cities by pumping groundwater or transporting water from distant mountains through aqueducts may increase evaporation, thereby increasing humidity and precipitation in a region. Approximately 60% of water that falls by precipitation on land
8、 each year evaporates to the atmosphere. A smaller component (about 40%) returns to the ocean surface and subsurface runoff. This small annual transfer of water supplies resources for rivers and urban and agricultural lands. Unfortunately, distribution of water on land is far from uniform. As human
9、population increases, water shortages will become more frequent in arid and semi-arid regions, where water is naturally nonabundant. (分数:10.40)(1).Which of the sentences below best expresses the information in the highlighted statement in the passage? The other choices change the meaning or leave ou
10、t important information.(分数:0.80)A.It is the hydrologic cycle that causes water to evaporate from plants, soil, and bodies of water inland as well as from the oceans.B.Solar energy is the source of power for the hydrologic cycle, which begins by evaporating water from plants, soil, oceans, and fresh
11、water sources.C.The evaporation of water from the oceans, freshwater sources, plants, and soils is the natural process, which we call the hydrologic cycle.D.Energy from the sun and the hydrologic cycle are power sources for plants that require water from the oceans and freshwater sources.(2).Based o
12、n information in paragraph 1, which of the following best explains the term “hydrologic cycle“?(分数:0.80)A.The movement of water from freshwater bodies into the oceansB.Solar energy in the atmosphere that produces rain over land and oceansC.Water resources from oceans and freshwater sources inlandD.T
13、ransportation of water from oceans into the atmosphere and onto the land(3).The phrase The rest in the passage refers to(分数:0.80)A.oceansB.ice capsC.glaciersD.water(4).How do man-made water resources such as reservoirs and lakes affect the water cycle?(分数:0.80)A.They increase the danger of flooding
14、in the areas surrounding them.B.They cause changes in the patterns of rainfall in the immediate area.C.They provide water sources for agricultural purposes in dry areas.D.They improve the natural flow of water into the oceans.(5).Freshwater is considered important because(分数:0.80)A.it evaporates mor
15、e quickly than water in the oceanB.it is the largest source of water on EarthC.it determines the landscape of rocks and sedimentD.it is the runoff that empties into the oceans(6).The word component in the passage is closest in meaning to(分数:0.80)A.errorB.partC.estimateD.source(7).The word fundamenta
16、l in the passage is closest in meaning to(分数:0.80)A.diverseB.commonC.basicD.attractive(8).Why does the author mention the Mississippi River in paragraph 4?(分数:0.80)A.The Mississippi River is an example of a drainage basin.B.The Mississippi River is one of the largest rivers in the region.C.The Missi
17、ssippi River is used in evaluating the runoff from hills.D.The Mississippi River is named for the area surrounding it.(9).According to paragraph 5, which of the following is true about the global transfer of water?(分数:0.80)A.Most rainwater stays in the atmosphere for less than a week.B.Glaciers are
18、a better source of water than the oceans.C.Most of the water in the world is currently in the water cycle.D.Less than 1 percent of the water can be used for human consumption.(10).According to paragraph 6, why is water a problem?(分数:0.80)A.There is not enough water available in the world.B.Plants an
19、d animals are using the water that humans require.C.Distribution of water where it is needed can be difficult.D.Most of the water is too old to be used safely.(11).The word significant in the passage is closest in meaning to(分数:0.80)A.rareB.smallC.importantD.regular(12).Look at the four squares that
20、 show where the following sentence could be inserted in the passage. As a result, water shortages occur in some areas. Where could the sentence best be added? Click on a square to insert the sentence in the passage.(分数:0.80)A.B.C.D.(13).Directions: An introduction for a short summary of the passage
21、appears below. Complete the summary by selecting the THREE answer choices that mention the most important points in the passage. Some sentences do not belong in the summary because they express ideas that are not included in the passage or are minor points from the passage. This question is worth 2
22、points. The hydrologic cycle transfers water from the oceans to the atmosphere, from the atmosphere to the land, and back to the oceans. Answer ChoicesAThe global problem is the availability of water that is suitable for human use where and when it is needed. BOnly about 0.001% of the total water on
23、 Earth is in the atmosphere at a particular point in time. CSolar energy causes the evaporation of oceans and freshwater lakes and rivers into the atmosphere. DWater shortages will probably become more common as more people begin to live in desert regions. EPrecipitation in the form of rainfall repl
24、enishes the water in the ocean and in drainage basins on land. FDesalination is a key solution to the problem of adequate water supplies for human use.(分数:0.80)三、PART (总题数:2,分数:20.80)“Piaget“s Cognitive Development Theory“ The famous Swiss psychologist Jean Piaget (1896-1980) proposed an important t
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- 托福 53 答案 解析 DOC