为了便于大家更好的进行雅思考试的准备，在考前了解雅思考试趋势，小编为大家带来了2017年1月21日雅思阅读预测【大范围】，一起来具体的了解一下。在考前三天左右，小编会为大家带来雅思考前小范围预测，欢迎关注。
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以下是小编为大家带来2017年1月21日雅思阅读预测题目及答案解析，大家可以进行练习：
List of Headings
i Seeking the transmission of radio signals from planets
ii Appropriate responses to signals from other civilisations
iii Vast distances to Earth’s closest neighbours
iv Assumptions underlying the search for extra-terrestrial intelligence
v Reasons for the search for extra-terrestrial intelligence
vi Knowledge of extra-terrestrial life forms
vii Likelihood of life on other planets
Example Answer
Paragraph A v
14 Paragraph B
15 Paragraph C
16 Paragraph D
17 Paragraph E
IS THERE ANYBODY OUT THERE?
The Search for Extra-terrestrial Intelligence
The question of whether we are alone in the Universe has haunted humanity for centuries, but we may now stand poised on the brink of the answer to that question, as we search for radio signals from other intelligent civilisations. This search, often known by the acronym SETI (search for extra-terrestrial intelligence), is a difficult one. Although groups around the world have been searching intermittently for three decades, it is only now that we have reached the level of technology where we can make a determined attempt to search all nearby stars for any sign of life.
A
The primary reason for the search is basic curiosity hethe same curiosity about the natural world that drives all pure science. We want to know whether we are alone in the Universe. We want to know whether life evolves naturally if given the right conditions, or whether there is something very special about the Earth to have fostered the variety of life forms that, we see around us on the planet. The simple detection of a radio signal will be sufficient to answer this most basic of all questions. In this sense, SETI is another cog in the machinery of pure science which is continually pushing out the horizon of our knowledge. However, there are other reasons for being interested in whether life exists elsewhere. For example, we have had civilisation on Earth for perhaps only a few thousand years, and the threats of nuclear war and pollution over the last few decades have told us that our survival may be tenuous. Will we last another two thousand years or will we wipe ourselves out? Since the lifetime of a planet like ours is several billion years, we can expect that, if other civilisations do survive in our galaxy, their ages will range from zero to several billion years. Thus any other civilisation that we hear from is likely to be far older, on average, than ourselves. The mere existence of such a civilisation will tell us that long-term survival is possible, and gives us some cause for optimism. It is even possible that the older civilisation may pass on the benefits of their experience in dealing with threats to survival such as nuclear war and global pollution, and other threats that we haven’t yet discovered.
B
In discussing whether we are alone, most SETI scientists adopt two ground rules. First, UFOs (Unidentified Flying Objects) are generally ignored since most scientists don’t consider the evidence for them to be strong enough to bear serious consideration (although it is also important to keep an open mind in case any really convincing evidence emerges in the future). Second, we make a very conservative assumption that we are looking for a life form that is pretty well like us, since if it differs radically from us we may well not recognise it as a life form, quite apart from whether we are able to communicate with it. In other words, the life form we are looking for may well have two green heads and seven fingers, but it will nevertheless resemble us in that it should communicate with its fellows, be interested in the Universe, live on a planet orbiting a star like our Sun, and perhaps most restrictively, have a chemistry, like us, based on carbon and water.
C
Even when we make these assumptions, our understanding of other life forms is still severely limited. We do not even know, for example, how many stars have planets, and we certainly do not know how likely it is that life will arise naturally, given the right conditions. However, when we look at the 100 billion stars in our galaxy (the Milky Way), and 100 billion galaxies in the observable Universe, it seems inconceivable that at least one of these planets does not have a life form on it; in fact, the best educated guess we can make, using the little that we do know about the conditions for carbon-based life, leads us to estimate that perhaps one in 100,000 stars might have a life-bearing planet orbiting it. That means that our nearest neighbours are perhaps 100 light years away, which is almost next door in astronomical terms.
D
An alien civilistation could choose many different ways of sending information across the galaxy, but many of these either require too much energy, or else are severely attenuated while traversing the vast distances across the galaxy. It turns out that, for a given amount of transmitted power, radio waves in the frequency range 1000 to 3000 MHz travel the greatest distance, and so all searches to date have concentrated on looking for radio waves in this frequency range. So far there have been a number of searches by various groups around the world, including Australian searches using the radio telescope at Parkes, New South Wales. Until now there have not been any detections from the few hundred stars which have been searched. The scale of the searches has been increased dramatically since 1992, when the US Congress voted NASA $10 million per year for ten years to conduct, a thorough search for extra-terrestrial life. Much of the money in this project is being spent on developing the special hardware needed to search many frequencies at once. The project has two parts. One part is a targeted search using the world’s largest radio telescopes, the American-operated telescope in Arecibo, Puerto Rico and the French telescope in Nancy in France. This part of the project is searching the nearest 1000 likely stars with high sensitivity for signals in the frequency rang 1000 to 3000 MHz. The other part of the project is an undirected search which is monitoring all of space with a lower sensitivity, using the smaller antennas of NASA’s Deep Space Network.
E
There is considerable debate over how we should react if we detect a signal from an alien civilisation. Everybody agrees that we should not reply immediately. Quite apart from the impracticality of sending a reply over such large distances at short notice, it raises a host of ethical questions that would have to be addressed by the global community before any reply could be sent. Would the human race face the culture shock if faced with a superior and much older civilisation? Luckily, there is no urgency about this. The stars being searched are hundreds of light years away, so it takes hundreds of years for their signal to reach us, and a further few hundred years for our reply to reach them. It’s not important, then, if there’s a delay of a few years, or decades, while the human race debates the question of whether to reply, and perhaps carefully drafts a reply.
Questions 18-20
Answer the questions below.
Choose NO MORE THAN THREE WORDS AND/OR A NUMBER from the passage for each answer.
Write your answers in boxes 18-20 on your answer sheet.
18 What is the life expectancy of Earth?
19 What kind of signals from other intelligent civilisations are SETI scientists searching for?
20 How many stars are the world’s most powerful radio telescopes searching?
Questions 21-26
Do the following statements agree with the views of the writer in Reading Passage 2?
In boxes 21-26 on your answer sheet, write
YES if the statement agrees with the views of the writer
NO if the statement contradicts the views of the writer
NOT GIVEN if it is impossible to say what the writer thinks about this
21 Alien civilisations may be able to help the human race to overcome serious problems.
22 SETI scientists are trying to find a life form that resembles humans in many ways.
23 The Americans and Australians have co-operated on joint research projects.
24 So far SETI scientists have picked up radio signals from several stars.
25 The NASA project attracted criticism from some members of Congress.
26 If a signal from outer space is received, it will be important to respond promptly.
以下是小编为大家带来的这篇雅思阅读的答案解析，一起来了解一下：
Question 14
答案: iv
关键词: assumptions, underlying
定位原文: B段第1句“In discussing whether we are alone, most…”
解题思路: 这句明确表明SETI科学家在搜寻外星人时遵循两个基本原则。Ground相当于题目中的 underlying, rules相当于题目中的 assumptions，接下来的文字叙述两个原则分别是什么。考生从首句可以很明确地判断出正确答案是iv。个别考生可能会看到second后面句子中的assumption— 词，进而看到a life form，就认为答案是vi，这种选择显然是以偏概全的，是不正确的。段意必须能够涵盖一整段内容，而不是某个部分或者某句话的内容。
因此本题答案是iv。
Question 15
答案: vii
关键词: likelihood of, lives, other planets
定位原文: C段第3句的后半句“… ; in fact, the best educated guess…”
解题思路: 这一段是无法仅仅从首句就判断答案的，需要读举例的内容，甚至读完整段，出题人不断用guess, estimate, perhaps, might这样的词来印证题干中的 likelihood一词。
Question 16
答案： i
关键词： radio signals, from
定位原文： D段第1、2句“An alien… It turns out…”
解题思路: 本段是文中首次正式提出搜寻外星生命的方法，radio waves一词不断被重复。Looking for相当于题目中的 seeking，radio waves 相当于 radio signals，所有剩余headings中只有i和ii谈到了 radio signals，从逻辑上推测不可能是ii，因为只有先搜寻外星信号，才可能谈到作回应的事情。故此题答案是i。
Question 17
答案： ii
关键词： appropriate responses
定位原文： E段第1句“There is considerate debate over…”
解题思路： 本段首句明确提出如果收到了外星文明信号， 人类应该如何回应的问题。React相当于题目中的responses。而how暗指appropriate。故答案是ii。
Question 18
答案: several billion years
关键词： life expectancy, Earth
定位原文： A段第9句“Since the lifetime of…”
解题思路: Earth这个词出现在A段的第九行。顺着这个词再向下找到lifetime, 显然这个词对应题目中的life expectancy(寿命)一词，读完本句发现答案应该是several billion years 。
Question 19
答案: radio waves
关键词： What kind of signals from other intelligent civilisations
定位原文： D段第1句“An alien civilisation could choose…”
解题思路： 本题定位与上一题相隔较远。但是如果已经先完成了 List of Headings题目，就不难发现只有D段是在具体讲外星文明会选择哪种输送信息的方式。题目中问的是SETI科学家在搜寻从外星文明发来的哪一种信号，也就表明答案是个具体的信号形式，考生也就不难猜测答案是radio waves。注意，此处问的是信号的形式，而不是电波频率，因此填1000或者3000 MHz是不正确的。
Question 20
答案： 1000
关键词： How many, most powerful radio telescopes
定位原文：D段倒数第4句“The project has two parts. One part is…”
解题思路：通过阅读题目，发现要寻找的是恒星的数量。只要定位数字 就能迅速找到本题的位置。于是，考生找到1000这个数字，并且能迅速排除下方的1000到3000MHz。从1000这个数字向上看，考生可以看到 world’s largest radio telescopes与题目中的 most powerful radio telescopes 是同义表达。
Question 21
答案： YES
关键词： Alien civilisations / the human race
定位原文： A段最后一句“It is even possible that…” 这些更古老的文明甚至有可能将其在应对生存威胁过程中积累下来的有益经验传授给我们，例如如何应对核战争与全球污染带来的威胁，以及如何应对其他我们尚未发现的潜在威胁。
解题思路： 根据题干关键字alien civilisation以及List of Headings题目留下的线索，最终会发现A段的最后一句话能够对应本题。 be able to help能够对应文中的it is even possible, serious problems对应文中的threats。本题基本上属于同义词替换型的YES题目。
Question 22
答案： YES
关键词： SETI，resembles
定位原文： B段第3句“Second, we make a very conservative assumption…” 第二，我们保守地假定我们正在搜寻的生命形式和人类非常相似。
解题思路: 本句的定位可以根据顺序原则推测，We在这里指的就是SETI的科学家们，resemble humans指的是is pretty well like us。只要能顺利定位，就能够通过同义词转换解答。
Question 23
答案： NOT GIVEN
关键词： The Americans and Australians，Co-operated
定位原文： D段第3句“...，including Australian searches using…”
解题思路： 文章的D段虽然先提到了澳大利亚的搜寻工作，接着又提到了美国航空航天局负责的美国太空望远镜的搜索工作，但是并没有明确指出在这方面澳大利亚人和美国人有没有cooperate，合作这个概念完全是出题人的杜撰，遇到这种情况，应该选择NOT GIVEN。
Question 24
答案: NO
关键词: SETI scientists，have picked up
定位原文: D段第4句“Until now there have …” 直到现在，在已经搜寻过的几百个恒星中还没有任何发现。
解题思路：此题定位处位于上一题定位词Australian的后方，比较好找。文中明确指出迄今为止，科学家们还一无所获，而不是题目中所说的已经发现了信号。文中的have not been和题目中的have picked up相矛盾, 连时态都没有改变，是一道简单的同义词冲突型的NO。
Question 25
答案： NOT GIVEN
关键词： NASA, Congress, criticism
定位原文：D段第5句“The scale of the search…” 1992年，美国国会计划在以后的十年里每年为美国国家航空航天局投资1,000万美元，用于对外星生命进行彻底的搜寻。从那时起，搜寻的规模便开始大幅增加。
解题思路：文中仅仅说国会通过议案给NASA拨款来对外星人进行彻底的搜寻，并未涉及这个项目有没有遭到某些议员批评一说。因此本题属于完全未提及型NOT GIVEN。
Question 26
答案： NO
关键词： respond promptly
定位原文：E段第1、2句“There is considerable debate over…” 如果我们真的发现了来自外星文明的信号，我们应该如何回应呢?这是一个备受争议的问题。所有人都认为我们不应该立即作出回应。
解题思路：文中这句话明确指出了对待外星人信号的态度，那就是不能立即回应，这与题目中提出的马上作出回应完全相反。Immediately相当于promptly。
以上是小编为大家分享的2017年1月21日雅思阅读预测【大范围】，希望能够对大家有所帮助。