雅思阅读定位难怎么办

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雅思阅读答疑解惑：阅读定位难怎么办

雅思阅读定位词选取总规则

在雅思阅读的定位中，我们主要是通过定位词来确定题目对应的文章具体部分，其原因在于简短精确，节省时间，毕竟雅思阅读文章篇幅很长，阅读量大，一个小时的时间对于大多数烤鸭们来讲实在不算充裕。

那么如何选取定位词?

首先，选取定位词需要遵循一个总的原则，即——以名词为主。

在此提醒烤鸭们不要忘记了雅思阅读考试的核心是同义替换，从考试核心出发，名词在各类词性中意思相对唯一且明确，也因此不容易出现替换，所以在选取定位词的过程中，首先需要寻找的便是名词。

当然这并不表示所有的名词都可以用作定位词。我们首先选取名词作为定位词的原因是其意思相对唯一明确，不易替换，但是名词中有一类是不符合这个特点的——抽象名词。

抽象名词可以举出很多例 子， 诸 如 reason，idea，definition… 我 们 以definition 为例，definition 的意思是“定义，解释”，一篇文章中可能会出现对多个专家学者对某一特定现象的解释或阐释，那么在这篇文章中，每一个学者说过的话，都是一个“definition”，如此一来，如果我们选择某一题目中的“definition”作为定位词，那么该题目便无法对应到文章中的具体部分，显然就无法进一步解答了。

因此，在定位词的选取上，我们要遵循名词为主的总原则，但是要排除掉名词中的抽象名词一类。

寻找特殊词

在以名词为主的总原则下，我们要进一步睁大我们的眼睛，去发现题目中的“特殊词”。那么何为“特殊词”?常见的“特殊词”又有哪些?

(1)以大写、斜体形式出现的词

雅思阅读中会有字体上的差异，大多数情况下，如果我们在题目中读到了以大写或是斜体形式出现的单词，这些词因其“外形”上的与众不同，值得我们格外留意，一般来讲，这类词是适合选择的定位词。

(2)数字

众所周知，英文里的数字相对来讲拼写繁琐，所以大多数情况下，阅读中出现的数字都是以阿拉伯数字形式出现的，包括百分数、分数等等，也因此数字在大多数情况下在一堆英文字母里就显得格外突出啦!所以，一般来讲，数字同样也是适合选作定位的“特殊词”之一。

(3)时间

雅思阅读中涉及到的时间非常多，大到世纪，小到分秒。时间同样是一类适合选择作为定位词的“特殊词”。时间的特性之一便是其唯一性，而这恰恰符合我们选择定位词的要求，诸如 1985、二十世纪等都是唯一且确定的时间，同样容易发现，且不易替换。更不用说年份这类词尝尝是以阿拉伯数字形式出现的，就更加显眼了!

(4)人名

学术类阅读中常常涉及各类专家、学者，因此人名同样是出镜频率较高的一类“特殊词”。人名出现需要大写，且拼写方式明显与其他词不同，烤鸭们最头疼的替换问题更是完全不需要担心!因此，一般情况下，人名同样是题目中适合作为定位词的“特殊词”。

雅思阅读特殊词的特殊情况

首先看题目中有无“特殊词”的原因是其显眼好找，且不易替换的特性。“不易替换”

当然不等于“不会替换”，考官们在“特殊词”上，也会想尽办法，企图难倒众烤鸭们。

例如数字上容易出现特殊情况的百分数。《剑桥雅思 7》Test 2 Passage 3 的第 34题 ：

“The survey concluded that one-fifth or 20% of the household transport requirement as outside the local area.”中选择“20%”作为定位词，而回到文章中却根本没有发现 20% 这个数字，实际上就是考官耍了一个小trick，20% outside 在文章中变成了 80% within。

所以，当用百分数 X 作为定位词没有找到对应时，我们要去寻找 1-X。

没有特殊词怎么办?

要始终坚信，考官是冷酷无情的!他们是不会轻易放过烤鸭们的，所以大多数情况下，只有少部分题目中会出现上述容易定位的“特殊词”。在没有“特殊词”的情况下，我们需要选择普通词作为主要定位词。

首先，普通词定位同样是建立在词性原则基础上的，即以名词为主。

其次，我们在选取普通定位词的时候，重点是关注一道题目中的主语名词和宾语名词。

一般情况下，我们以主语名词为主，宾语名词为辅。原因在于主语名词中的“主”字，其重要性已经不言而喻，所以一道没有“特殊词”的题目，我们首先应当关注主语名词。

但是，当宾语名词与主语名词相比，宾语名词是一个更加不熟悉、不常见，甚至完全不认识的词时，宾语名词就一跃成为了主要定位词。原因有两点：

(1)该词在文章中的对应性很强，有可能仅在此文中出现并进行专门讨论。

(2)该词本身就是一个专有名词，那么该词就从一个所谓的“普通词”变成了不易，甚至是无法替换的“特殊词”。

例 如， 剑 7 Test 1 Passage 2 中 第 22 题：

“Feeding increasing populations is possible due primarily to improved irrigation systems.”中的“irrigation systems”，即灌溉系统一词，大多数烤鸭初看该词并不知道其准确意思，但是它属于要以宾语名词为主的情况，且本身就是一个专有名词，文中该词也是以原词形式出现的。

同样的情况也适用于第 26 题：

“In the future, governments should maintain ownership of water infrastructures.”的“infrastructures”一词。

所以，当没有“特殊词”，而只能选用普通词定位时，我们需要将题目中的主语名词和宾语名词选出并比较，一般情况下以主语名词为主，宾语名词为辅;当宾语名词更加不熟悉、不常见，甚至完全不认识时，以宾语名词为主要定位词。同时需要提出的是，普通词定位大概率会出现同义替换，要想做到精确定位，除了掌握好定位原则之外，还需要在同义词上多下功夫!

总之，掌握雅思阅读定位的技巧并不能够一蹴而就。还需要各位考鸭在平时的阅读训练中多加注意和练习。同时，雅思阅读的定位技巧一定是灵活运用的，适当的变通，不要花太多时间纠结.

雅思阅读考试模拟试练习题及答案解析

Time to cool it

From The Economist print edition

1 REFRIGERATORS are the epitome of clunky technology: solid, reliable and just a little bit dull. They have not changed much over the past century, but then they have not needed to. They are based on a robust and effective idea--draw heat from the thing you want to cool by evaporating a liquid next to it, and then dump that heat by pumping the vapour elsewhere and condensing it. This method of pumping heat from one place to another served mankind well when refrigerators' main jobs were preserving food and, as air conditioners, cooling buildings. Today's high-tech world, however, demands high-tech refrigeration. Heat pumps are no longer up to the job. The search is on for something to replace them.

2 One set of candidates are known as paraelectric materials. These act like batteries when they undergo a temperature change: attach electrodes to them and they generate a current. This effect is used in infra-red cameras. An array of tiny pieces of paraelectric material can sense the heat radiated by, for example, a person, and the pattern of the array's electrical outputs can then be used to construct an image. But until recently no one had bothered much with the inverse of this process. That inverse exists, however. Apply an appropriate current to a paraelectric material and it will cool down.

3 Someone who is looking at this inverse effect is Alex Mischenko, of Cambridge University. Using commercially available paraelectric film, he and his colleagues have generated temperature drops five times bigger than any previously recorded. That may be enough to change the phenomenon from a laboratory curiosity to something with commercial applications.

4 As to what those applications might be, Dr Mischenko is still a little hazy. He has, nevertheless, set up a company to pursue them. He foresees putting his discovery to use in more efficient domestic fridges and air conditioners. The real money, though, may be in cooling computers.

5 Gadgets containing microprocessors have been getting hotter for a long time. One consequence of Moore's Law, which describes the doubling of the number of transistors on a chip every 18 months, is that the amount of heat produced doubles as well. In fact, it more than doubles, because besides increasing in number, the components are getting faster. Heat is released every time a logical operation is performed inside a microprocessor, so the faster the processor is, the more heat it generates. Doubling the frequency quadruples the heat output. And the frequency has doubled a lot. The first Pentium chips sold by Dr Moore's company, Intel, in 1993, ran at 60m cycles a second. The Pentium 4--the last "single-core" desktop processor--clocked up 3.2 billion cycles a second.

6 Disposing of this heat is a big obstruction to further miniaturisation and higher speeds. The innards of a desktop computer commonly hit 80℃. At 85℃, they stop working. Tweaking the processor's heat sinks (copper or aluminium boxes designed to radiate heat away) has reached its limit. So has tweaking the fans that circulate air over those heat sinks. And the idea of shifting from single-core processors to systems that divided processing power between first two, and then four, subunits, in order to spread the thermal load, also seems to have the end of the road in sight.

7 One way out of this may be a second curious physical phenomenon, the thermoelectric effect. Like paraelectric materials, this generates electricity from a heat source and produces cooling from an electrical source. Unlike paraelectrics, a significant body of researchers is already working on it.

8 The trick to a good thermoelectric material is a crystal structure in which electrons can flow freely, but the path of phonons--heat-carrying vibrations that are larger than electrons--is constantly interrupted. In practice, this trick is hard to pull off, and thermoelectric materials are thus less efficient than paraelectric ones (or, at least, than those examined by Dr Mischenko). Nevertheless, Rama Venkatasubramanian, of Nextreme Thermal Solutions in North Carolina, claims to have made thermoelectric refrigerators that can sit on the back of computer chips and cool hotspots by 10℃. Ali Shakouri, of the University of California, Santa Cruz, says his are even smaller--so small that they can go inside the chip.

9 The last word in computer cooling, though, may go to a system even less techy than a heat pump--a miniature version of a car radiator. Last year Apple launched a personal computer that is cooled by liquid that is pumped through little channels in the processor, and thence to a radiator, where it gives up its heat to the atmosphere. To improve on this, IBM's research laboratory in Zurich is experimenting with tiny jets that stir the liquid up and thus make sure all of it eventually touches the outside of the channel--the part where the heat exchange takes place. In the future, therefore, a combination of microchannels and either thermoelectrics or paraelectrics might cool computers. The old, as it were, hand in hand with the new.

(830 words)

Questions 1-5

Complete each of the following statements with the scientist or company name from the box below.

Write the appropriate letters A-F in boxes 1-5 on your answer sheet.

A. Apple

B. IBM

C. Intel

D. Alex Mischenko

E. Ali Shakouri

F. Rama Venkatasubramanian

1. ...and his research group use paraelectric film available from the market to produce cooling.

2. ...sold microprocessors running at 60m cycles a second in 1993.

3. ...says that he has made refrigerators which can cool the hotspots of computer chips by 10℃.

4. ...claims to have made a refrigerator small enough to be built into a computer chip.

5. ...attempts to produce better cooling in personal computers by stirring up liquid with tiny jets to make sure maximum heat exchange.

Questions 6-9

Do the following statements agree with the information given in the reading passage?

In boxes 6-9 on your answer sheet write

TRUE if the statement is true according to the passage

FALSE if the statement is false according to the passage

NOT GIVEN if the information is not given in the passage

6. Paraelectric materials can generate a current when electrodes are attached to them.

7. Dr. Mischenko has successfully applied his laboratory discovery to manufacturing more efficient referigerators.

8. Doubling the frequency of logical operations inside a microprocessor doubles the heat output.

9. IBM will achieve better computer cooling by combining microchannels with paraelectrics.

Question 10

Choose the appropriate letters A-D and write them in box 10 on your answer sheet.

10. Which method of disposing heat in computers may have a bright prospect?

A. Tweaking the processors?heat sinks.

B. Tweaking the fans that circulate air over the processor抯 heat sinks.

C. Shifting from single-core processors to systems of subunits.

D. None of the above.

Questions 11-14

Complete the notes below.

Choose one suitable word from the Reading Passage above for each answer.

Write your answers in boxes 11-14 on your answer sheet.

Traditional refrigerators use...11...pumps to drop temperature. At present, scientists are searching for other methods to produce refrigeration, especially in computer microprocessors....12...materials have been tried to generate temperature drops five times bigger than any previously recorded. ...13...effect has also been adopted by many researchers to cool hotspots in computers. A miniature version of a car ...14... may also be a system to realize ideal computer cooling in the future.

Key and Explanations:

1. D

See Paragraph 3: ...Alex Mischenko, of Cambridge University. Using commercially available paraelectric film, he and his colleagues have generated temperature drops...

2. C

See Paragraph 5: The first Pentium chips sold by Dr Moore's company, Intel, in 1993, ran at 60m cycles a second.

3. F

See Paragraph 8: ...Rama Venkatasubramanian, of Nextreme Thermal Solutions in North Carolina, claims to have made thermoelectric refrigerators that can sit on the back of computer chips and cool hotspots by 10℃.

4. E

See Paragraph 8: Ali Shakouri, of the University of California, Santa Cruz, says his are even smaller梥o small that they can go inside the chip.

5. B

See Paragraph 9: To improve on this, IBM's research laboratory in Zurich is experimenting with tiny jets that stir the liquid up and thus make sure all of it eventually touches the outside of the channel--the part where the heat exchange takes place.

6. TRUE

See Paragraph 2: ...paraelectric materials. These act like batteries when they undergo a temperature change: attach electrodes to them and they generate a current.

7. FALSE

See Paragraph 3 (That may be enough to change the phenomenon from a laboratory curiosity to something with commercial applications. ) and Paragraph 4 (As to what those applications might be, Dr Mischenko is still a little hazy. He has, nevertheless, set up a company to pursue them. He foresees putting his discovery to use in more efficient domestic fridges?

8. FALSE

See Paragraph 5: Heat is released every time a logical operation is performed inside a microprocessor, so the faster the processor is, the more heat it generates. Doubling the frequency quadruples the heat output.

9. NOT GIVEN

See Paragraph 9: In the future, therefore, a combination of microchannels and either thermoelectrics or paraelectrics might cool computers.

10. D

See Paragraph 6: Tweaking the processor's heat sinks ?has reached its limit. So has tweaking the fans that circulate air over those heat sinks. And the idea of shifting from single-core processors to systems?also seems to have the end of the road in sight.

11. heat

See Paragraph 1: Today's high-tech world, however, demands high-tech refrigeration. Heat pumps are no longer up to the job. The search is on for something to replace them.

12. paraelectric

See Paragraph 3: Using commercially available paraelectric film, he and his colleagues have generated temperature drops five times bigger than any previously recorded.

13. thermoelectric

See Paragraph 7: ...the thermoelectric effect. Like paraelectric materials, this generates electricity from a heat source and produces cooling from an electrical source. Unlike paraelectrics, a significant body of researchers is already working on it.

14. radiator

See Paragraph 9: The last word in computer cooling, though, may go to a system even less techy than a heat pump--a miniature version of a car radiator.

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