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[机经回忆] [小站独家]2017年2月25日雅思阅读考试真题回忆与解析

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发表于 2017-3-1 10:31 |显示全部楼层
2017年02月25日 雅思考试已经结束,小站教育徐乐老师和高菀老师为大家带来A类考试最新,最快,最全的考试回忆。范文由黄天枝老师带来。
2月25完整考试回忆,点击进入

  
2017年02月25日  雅思阅读考题回忆
  
Passage One
题材:社会类
题目:The  concept of childhood in the western countries
题型:简答6,判断7
文章主旨:文章主要介绍了18世纪至19世纪,西方人们对儿童观念的变化。一开始,人们把儿童看作是劳动的工具,使用童工。后来教育渐渐普及。
简答1-6:
  
1、What concept had become a  controversial topic
  
childhood  development
  
2、What were middle aged children  called?
  
miniature  adults
  
3、What economic development caused  children become labour?
  
industrialization
  
4、These children are called
  
useful  child
  
5、what are the two main activities  of children at the end of 19th century?
  
play  and education
  
6、待补充
  
  
判断7-13:
  
7、FALSE  According to Aries, during  middle aged, children were unloved.
  
8、FALSE  Ariess studies were based on reliable data.
  
9、NOT GIVEN  The working time of  children was as long as adults.
  
10、TRUE  The school was one  of the result of Factory Act.
  
11、FALSE  The Factory Act  made sure that all children went to school.
  
12、TRUE  By 20 century,  almost all children need to go to school.
  
13、NOT GIVEN Nowadays people focus more on the particular need of children.
Passage Two
题材:地质类
题目:The  Ice Age
题型:选择4,人名配对5,填空4
文章主旨:文章主要讨论了气候变化带来的影响。由两幅名画预示未来的世界气温会下降,并讨论了全球气温骤降所带来的影响及应对措施
14-17 选择
  
14、A 预示未来会出现气温下降
  
15、D
  
16、C
  
17、D 是什么使部落遭受气温影响:迁移受限制
  
  
18-22 人名配对
  
18、C
  
19、D
  
20、B
  
21、E  
  
22、A  
  
选项:
  
A: Terrence byce
  
B: William Curry
  
C: Scientists worldwide
  
D: reporters in National Academy
  
E: Bob Dickson
  
  
23-26 填空
  
23、heat
  
24、the water is called (待补充)
  
25、North Atlantic  
  
26、turn southward
Passage Three
题材:环境类
题目:  The effect of ocean to salinity
题型:段落标题7  配对3  选择 4
文章主旨:文章主要讲了盐分变化对农业的影响,并介绍了各种探测海水盐分的方法,以及海水变卦和盐度之间的关系。
参考阅读:
  
Could Seawater Solve the Freshwater Crisis?
  
  
With 1.8  billion people predicted to live in areas of extreme water scarcity by 2025,  desalination-the removal of salt from water-is increasingly being proposed as  a solution.
  
But  before desalination can make a real difference solving in the looming water crisis,  officials and experts need to commit to overcoming obstacles that make the  process expensive and inefficient, a new paper argues.
  
Scientists  predict that by 2016, the amount of fresh water produced by desalination  plants will exceed 10 billion gallons (38 million cubic meters) a year, or  double the rate in 2008.
  
Modern  desalination plants use a technology called reverse osmosis, pressing salty  water through ultrathin, semipermeable plastic membranes. Unable to pass  through, large molecules or ions, such as salt, are filtered out, so fresh  water flows out the other side.
  
This  method wastes much less energy than earlier desalination techniques, such as  heating seawater and harvesting fresh water from the steam. But a typical  reverse osmosis plant can still spend up to 40 percent of its operating costs  on generating electricity to run the system-a big reason engineers are  searching for ways to cut costs and make plants more efficient, starting at  the membrane level.
  
Situation  Normal: All Fouled Up?
  
Reverse  osmosis membranes have improved since their invention in the 1960s. Today's  membranes do a better job of allowing water to pass through and keeping salts  out, for instance.The membranes are also more resistant to bacterial  contamination, but that doesn't mean the problem of "membrane  fouling" has been completely solved.
  
"When  you operate a membrane, bacteria in the water will accumulate on the thin  selective layer, making it more difficult to squeeze water through,"  explained Menachem Elimelech, an environmental engineer at Yale University,  who co-authored the new paper.
  
Chlorine  can be used to clear away the bacteria, but today's reverse osmosis membranes  are still very sensitive to chlorine and degrade quickly when exposed to the  harsh chemical.
  
"There  should be a lot of focus to develop membranes that are chlorine  resistant," Elimelech said.
  
  
Prefab  Desalination Plants?
  
No matter  how good the membranes become, however, reverse osmosis plants will need to  become cheaper to build and operate if they're to meet the demands of an  increasingly thirsty world, particularly in developing regions.
  
One way  to do this is to standardize plant components and methods and to create  smaller, more efficient plants, said Yoram Cohen, a chemical and biomolecular  engineering professor at the University of California, Los Angeles (UCLA).
  
"Why  are [personal computers] so cheap?" asked Cohen, who was not involved in  the new review. "It's because the technology is standardized. You can  buy parts from anyone and exchange them or combine them into your own  design."
  
  
U.S. Falling Behind?
  
Another  way to reduce costs and improve plants is to invest more in research,  development, and education, Cohen said.
  
In the  United States, at least, such funding is inadequate, said Cohen. He worries  the U.S. could soon be outpaced in desalination research by countries such as  Singapore, Israel, Australia, Spain, and the Netherlands.
  
Desalination,  he added, should be added as a basic element of an undergraduate engineering  education.
  
If such  steps aren't taken, he warned, the U.S. will become dependent on other  countries for a technology invented on its home soil.
  
"The  first membranes for water desalination were developed here at UCLA by Sidney  Loeb and Srivasa Sourirajan in the 1960s," and the pair later built the  world's first operating reverse osmosis plant in 1971, Cohen said.
  
  
Salt in the Earth
  
Another  puzzle is what to do with the salty water, or brine, created as part of the  desalination process. If a plant is close to the ocean, the brine can be  safely released back into the sea if it's dissolved beforehand. But getting  rid of this concentrated solution is more problematic for inland reverse  osmosis (RO) plants. "If you're away from a coastal region, it's not a  simple matter," Cohen said.
  
"There  are regulations that, in some regions, may prevent discharge of the RO  concentrate back into a surface water body or into the sewer. And in certain  areas, injecting that water underground may not be permitted and can be very  costly."
  
  
Despite  RO's promise, Yale's Elimelech is concerned that countries might see RO  desalination as a silver bullet for water woes. In many cases, the best  options may be slightly less sexy but also less expensive: smarter land  planning and plain-old water conservation, for example.(See  "Desalination No 'Silver Bullet' in Mideast.")"You cannot rely  absolutely on desalination," he said, "if you have other  alternatives.“

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