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[雅思阅读集训营] 模拟剑10 Test 2 Passage 1 集训

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明媚太阳花 发表于 2015-4-25 16:12:42 | 显示全部楼层 |阅读模式
本帖最后由 cassie 于 2015-8-11 11:35 编辑

剑10 Test 2 Passage 1 集训

READING PASSAGE 1
you should spendabout 20 minutes on Questions 1-15, which are based on Passage1 below.
Questions 1-5
Reading Passage 1 has fiveparagraphs, A-E Choose the most suitable heading for each paragraph from thelist of headings below. Write the t appropriate numbers (hi/iii) on i/ourAnswer Sheet There are more headings than paragraphs, so you will not use them all.
1 Paragraph A
2 Paragraph B
3 Paragraph C
4 Paragraph D
5 Paragraph E
List of Headings
Ⅰ Glacial Continents
Ⅱ  Formationand Growth of Glaciers
Ⅲ  Glacial Movement
Ⅳ  Glaciersin the Last Ice Age
Ⅴ  GlaciersThrough the years
Ⅵ  Typesof Glaciers
Ⅶ  GlacialEffects on Landscape
Ⅷ  Glaciersin National Parks
Glacier
Besides the earth’s oceans, glacier iceis the largest source of water on earth. A glacier is a massive stream or sheetof ice that moves underneath itself under the influence of gravity. Someglaciers travel down mountains or valleys, while others spread across a largeexpanse of land. Heavily glaciated regions such as Greenland and Antarctica arecalled continental glaciers. These two ice sheets encompass more than 95percent of the earth’s glacial ice. The Greenland ice sheet is almost 10,000feet thick in some areas, and the weight of this glacier is so heavy that muchof the region has been depressed below sea level. Smaller glaciers that occurat higher elevations are called alpine or valley glaciers. Another way ofclassifying glaciers is in terms of their internal temperature. In temperateglaciers, the ice within the glacier is near its melting point. Polar glaciers,in contrast, always maintain temperatures far below melting.
B
The majority of the earth’sglaciers are located near the poles, though glaciers exist on all continents,including Africa and Oceania. The reason glaciers are generally formed in highalpine regions is that they require cold temperatures throughout the year. Inthese areas where there is little opportunity for summer ablation (loss ofmass), snow changes to compacted firn and then crystallized ice. During periodsin which melting and evaporation exceed the amount of snowfall, glaciers willretreat rather than progress. While glaciers rely heavily on snowfall, otherclimactic conditions including freezing rain, avalanches, and wind, contributeto their growth. One year of below average precipitation can stunt the growthof a glacier tremendously. With the rare exception of surging glaciers, acommon glacier flows about 10 inches per day in the summer and 5 inches per dayin the winter. The fastest glacial surge on record occurred in 1953, when theKutiah Glacier in Pakistan grew more than 12 kilometers in three months.
C
The weight and pressure of iceaccumulation causes glacier movement. Glaciers move out from under themselves,via plastic deformation and basal slippage. First, the internal flow of icecrystals begins to spread outward and downward from the thickened snow pack?also known as the zone of accumulation. Next, the ice along the ground surfacebegins to slip in the same direction. Seasonal thawing at the base of theglacier helps to facilitate this slippage. The middle of a glacier moves fasterthan the sides and bottom because there is no rock to cause friction. The upperpart of a glacier rides on the ice below. As a glacier moves it carves out aU-shaped valley similar to a riverbed, but with much steeper walls and aflatter bottom.
D
Besides the extraordinary rivers ofice, glacial erosion creates other unique physical features in the landscapesuch as horns, fjords, hanging valleys, and cirques. Most of these landforms donot become visible until after a glacier has receded. Many are created bymoraines, which occur at the sides and front of a glacier. Moraines are formedwhen material is picked up along the way and deposited in a new location. Whenmany alpine glaciers occur on the same mountain, these moraines can create a horn.The Matterhorn, in the Swiss Alps is one of the most famous horns. Fjords,which are very common in Norway, are coastal valleys that fill with ocean waterduring a glacial retreat. Hanging valleys occur when two or more glacialvalleys intersect at varying elevations. It is common for waterfalls to connectthe higher and lower hanging valleys, such as in Yosemite National Park. A cirqueis a large bow卜 shapedvalley that forms at the front of a glacier. Cirques often have a lip on theirdown slope that is deep enough to hold small lakes when the ice melts away.
E
Glacier movement and shapeshifting typically occur over hundreds of years. While presently about 10percent of the earth’s land is covered with glaciers, it is believed thatduring the last Ice Age glaciers covered approximately 32 percent of theearth's surface. In the past century, most glaciers have been retreating ratherthan flowing forward. It is unknown whether this glacial activity is due tohuman impact or natural causes, but by studying glacier movement, and comparingclimate and agricultural profiles over hundreds of years, glaciologists canbegin to understand environmental issues such as global warming.
Questions6-10
Dothe following statements agree with the information in Passage 1 ?
In boxes6-10 on your Answer Sheet, write
TRUE if the statement is trueaccording to the passage.
FALSE if the statement contradicts the passage.
NOT GIVEN if there is no information about this in thepassage.
6      Glaciers exist only near thenorth and south poles.
7      Glaciers are formed by acombination of snow and other weather conditions.
8      Glaciers normally move at arate of about 5 to 10 inches a day.
9.     All parts of the glaciermove at the same speed.
10.  During the lastIce Age, average temperatures were much lower than they are now.
Questions 11-15
Match each definitionbelow with the term it defines.
Writethe letter of the term, A-H, on your Answer Sheet There are more terms thandefinitions, so you will not use them all.
11 a glacier formed on a mountain
12 a glacier with temperatures well below freezing
13 a glacier that moves very quickly
14 a glacial valley formed near theocean
15 a glacial valley that looks like a bowl
Terms
A   fjord
B   alpine  glacier
C   horn
D  polar  glacier
E  temperate  glacier
F hanging  valley
G cirque
H surging glacier
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coco951 发表于 2015-7-28 22:02:01 | 显示全部楼层
丢铜球 求看谢谢啦~~~~~~~~~~~~~~~~
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oeirtqp7akwzs 发表于 2015-8-4 21:32:33 | 显示全部楼层
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bhswx008 发表于 2015-8-9 23:38:22 | 显示全部楼层
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Thanks a lot!
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答案。。啦啦啦
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