2021年6月英语六级考试真题试卷附答案(完整版 第3套).pdf

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1、欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 1 页 共 22 页 2021 年 6 月英语六级考试真题试卷附答案(完整版 第 3 套)Part I Writing(30 minutes)Directions:For this part,you are allowed 30 minutes to write an essay on the importance of motivation and methods in learning.You should write at least 150 words but no more than 2

2、00 words._ _ _ Part II Listening Comprehension(30 minutes)说明：由于 2021 年 6 月六级考试全国共考了两套听力，本套真题听力与前 2 套内容相同，只是选项顺序不同，因此在本套真题中不再重复出现。Part III Reading Comprehension(40 minutes)Section A Directions:In this section,there is a passage with ten blanks.You are required to select one word for each blank from a

3、 list of choices given in a word bank following the passage.Read the passage through carefully before making your choices.Each choice in the bank is identified by a letter.Please mark 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 2 页 共 22 页 the corresponding letter for each item on Answer Sheet 2

4、 with a single line through the centre.You may not use any of the words in the bank more than once.Steel is valued for its reliability,but not when it gets cold.Most forms of steel _26_ become brittle（脆的）at temperatures below about-25 unless they are mixed with other metals.Now,though,a novel type o

5、f steel has been developed that resists _27_ at much lower temperatures,while retaining its strength and toughnesswithout the need for expensive _28_.Steels fragility at low temperatures first became a major concern during the Second World War.After German U-boats torpedoed（用鱼雷攻击）numerous British sh

6、ips,a 2,700-strong fleet of cheap-and-cheerful Liberty ships was introduced to replace the lost vessels,providing a lifeline for the _29_ British.But the steel shells of hundreds of the ships _30_ in the icy north Atlantic,and 12 broke in half and sank.Brittleness remains a problem when building ste

7、el structures in cold conditions,such as oil rigs in the Arctic.So scientists have _31_ to find a solution by mixing it with expensive metals such as nickel.Yuuji Kimura and colleagues in Japan tried a more physical 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 3 页 共 22 页 _32_.Rather than adding

8、other metals,they developed a complex mechanical process involving repeated heating and very severe mechanical deformation,known as tempforming.The resulting steel appears to achieve a combination of strength and toughness that is _33_ to that of modem steels that are very rich in alloy content and,

9、therefore,very expensive.Kimuras team intends to use its tempformed steel to make ultra-high strength parts,such as bolts.They hope to reduce both the number of _34_ needed in a construction job and their weightby replacing solid supports with _35_ tubes,for example.This could reduce the amount of s

10、teel needed to make everything from automobiles to buildings and bridges.A）abruptly B）additives C）approach D）ardently E）besieged F）channel G）comparable H）components I）cracked 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 4 页 共 22 页 J）fractures K）hollow L）relevant M）reshuffled N）strived O）violent

11、Section B Directions:In this section,you are going to read a passage with ten statements attached to it.Each statement contains information given in one of the paragraphs.Identify the paragraph from which the information is derived.You may choose a paragraph more than once.Each paragraph is marked w

12、ith a letter.Answer the questions by marking the corresponding letter on Answer Sheet 2.The future of personal satellite technology is hereare we ready for it?A）Satellites used to be the exclusive playthings of rich governments and wealthy corporations.But increasingly,as space becomes more democrat

13、ized,they are coming within reach of ordinary people.Just like drones（无人机）before them,miniature satellites are beginning to fundamentally transform our conceptions of who gets to do what up above our heads.欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 5 页 共 22 页 B）As a recent report from the Nati

14、onal Academy of Sciences highlights,these satellites hold tremendous potential for making satellite-based science more accessible than ever before.However,as the cost of getting your own satellite in orbit drops sharply,the risks of irresponsible use grow.The question here is no longer Can we?but Sh

15、ould we?What are the potential downsides of having a slice of space densely populated by equipment built by people not traditionally labeled as professionals?And what would the responsible and beneficial development and use of this technology actually look like?Some of the answers may come from a no

16、nprofit organization that has been building and launching amateur satellites for nearly 50 years.C）Having your personal satellite launched into orbit might sound like an idea straight out of science fiction.But over the past few decades a unique class of satellites has been created that fits the bil

17、l:CubeSats.The Cube here simply refers to the satellites shape.The most common CubeSat is a 10cm cube,so small that a single CubeSat could easily be mistaken for a paperweight on your desk.These mini-satellites can fit in a launch vehicles formerly wasted space.Multiples can be deployed in combinati

18、on for more complex 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 6 页 共 22 页 missions than could be achieved by one CubeSat alone.D）Within their compact bodies these minute satellites are able to house sensors and communications receivers/transmitters that enable operators to study Earth from spa

19、ce,as well as space around Earth.Theyre primarily designed for Low Earth Orbit（LEO）an easily accessible region of space from around 200 to 800 miles above Earth,where human-tended missions like the Hubble Space Telescope and the International Space Station（ISS）hang out.But they can attain more dista

20、nt orbits;NASA plans for most of its future Earth-escaping payloads（to the moon and Mars especially）to carry CubeSats.E）Because theyre so small and light,it costs much less to get a CubSat into Earths orbit than a traditional communications or GPS satellite.For instance,a research group here at Ariz

21、ona State University recently claimed their developmental small CubeSats could cost as little as$3,000 to put in orbit.This decrease in cost allows researchers,hobbyists and even elementary school groups to put simple instruments into LEO or even having them deployed from the ISS.F）The first CubeSat

22、 was created in the early 2000s,as a way of enabling Stanford graduate students to design,build,欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 7 页 共 22 页 test and operate a spacecraft with similar capabilities to the USSRs Sputnik（前苏联的人造卫星）.Since then,NASA,the National Reconnaissance Office and ev

23、en Boeing have all launched and operated CubeSats.There are more than 130 currently in operation.The NASA Educational Launch of Nano Satellite program,which offers free launches for educational groups and science missions,is now open to U.S.nonprofit corporations as well.Clearly,satellites are not j

24、ust for rocket scientists anymore.G）The National Academy of Sciences report emphasizes CubeSats importance in scientific discovery and the training of future space scientists and engineers.Yet it also acknowledges that widespread deployment of LEO CubeSats isnt risk-free.The greatest concern the aut

25、hors raise is space debris pieces of junk that orbit the earth,with the potential to cause serious damage if they collide with operational units,including the ISS.H）Currently,there arent many CubeSats and theyre tracked closely.Yet as LEO opens up to more amateur satellites,they may pose an increasi

26、ng threat.As the report authors point out,even near-misses might lead to the creation of a burdensome regulatory framework and affect the future 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 8 页 共 22 页 disposition of science CubeSats.I）CubeSat researchers suggest that nows the time to ponder unex

27、pected and unintended possible consequences of more people than ever having access to their own small slice of space.In an era when you can simply buy a CubeSat kit off the shelf,how can we trust the satellites over our heads were developed with good intentions by people who knew what they were doin

28、g?Some expert amateurs in the satellite game could provide some inspiration for how to proceed responsibly.J）In 1969.the Radio Amateur Satellite Corporation（AMSAT）was created in order to foster ham radio enthusiasts（业余无 线 电 爱 好 者）participation in space research and communication.It continued the eff

29、orts,begun in 1961,by Project OSCARa U.S.-based group that built and launched the very first nongovernmental satellite just four years after Sputnik.As an organization of volunteers,AMSAT was putting amateur satellites in orbit decades before the current CubeSat craze.And over time,its members have

30、learned a thing or two about responsibility.Here,open-source development has been a central principle.Within the organization,AMSAT has a philosophy of open sourcing everythingmaking technical data on all aspects of their satellites fully available to 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第

31、 9 页 共 22 页 everyone in the organization,and when possible,the public.According to a member of the team responsible for FOX 1-A,AMSATs first CubeSat,this means that theres no way to sneak something like explosives or an energy emitter into an amateur satellite when everyone has access to the designs

32、 and implementation.K）However,theyre more cautious about sharing information with nonmembers,as the organization guards against others developing the ability to hijack and take control of their satellites.This form of self-governance is possible within long-standing amateur organizations that,over t

33、ime,are able to build a sense of responsibility to community members,as well as society in general.But what happens when new players emerge,who dont have deep roots within the existing culture?L）Hobbyists and students are gaining access to technologies without being part of a long-standing amateur e

34、stablishment.Theyre still constrained by fimders,launch providers and a series of regulationsall of which rein in what CubeSat developers can and cannot do.But theres a danger theyre ill-equipped to think through potential unintended consequences.What these unintended consequences might be is admitt

35、edly far from clear.Yet we know innovators can be 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 10 页 共 22 页 remarkably creative with taking technologies in unexpected directions.Think of something as seemingly benign as the cellphone we have microfinance and text-based social networking at one en

36、d of the spectrum,and improvised（临时制作的）explosive devices at the other.M）This is where a culture of social responsibility around CubeSats becomes important-not simply to ensure that physical risks are minimized,but to engage with a much larger community in anticipating and managing less obvious conse

37、quences of the technology.This is not an easy task.Yet the evidence from AMSAT and other areas of technology development suggests that responsible amateur communities can and do emerge around novel technologies.The challenge here,of course,is ensuring that what an amateur community considers to be r

38、esponsible,actually is.Heres where there needs to be a much wider public conversation that extends beyond government agencies and scientific communities to include students,hobbyists，and anyone who may potentially stand to be affected by the use of CubeSat technology.36.Given the easier accessibilit

39、y to space,it is time to think about how to prevent misuse of satellites.37.A group of mini-satellites can work together to 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 11 页 共 22 页 accomplish more complex tasks.38.The greater accessibility of mini-satellites increases the risks of their irrespon

40、sible use.39.Even school pupils can have their CubeSats put in orbit owing to the lowered launching cost.40.is careful about sharing information with outsiders to prevent hijacking of their satellites.41.NASA offers to launch CubeSats free of charge for educational and research purposes.42.Even with

41、 constraints,it is possible for some creative developers to take the CubeSat technology in directions that result in harmful outcomes.43.While making significant contributions to space science,CubeSats may pose hazards to other space vehicles.44.Mini-satellites enable operators to study Earth from L

42、EO and space around it.45.AMSAT operates on the principle of having all its technical data accessible to its members,preventing the abuse of amateur satellites.Section C Directions:There are 2 passages in this section.Each passage is followed by some questions or unfinished statements.欢迎您阅读并下载本文档，本文

43、档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 12 页 共 22 页 For each of them there are four choices marked A),B),C)and D).You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.Passage One Questions 46 to 50 are based on the following passag

44、e.When I re-entered the full-time workforce a few years ago after a decade of solitary self-employment,there was one thing I was looking forward to the most:the opportunity to have work friends once again.It wasnt until I entered the corporate world that I realized,for me at least,being friends with

45、 colleagues didnt emerge as a priority at all.This is surprising when you consider the prevailing emphasis by scholars and trainers and managers on the importance of cultivating close interpersonal relationships at work.So much research has explored the way in which collegial（同事的）ties can help overc

46、ome a range of workplace issues affecting productivity and the quality of work output such as team-based conflict,jealousy,undermining,anger,and more.Perhaps my expectations of lunches,water-cooler gossip and caring,deep-and-meaningful conversations were a legacy of the last time I was in that kind

47、of office environment.Whereas 欢迎您阅读并下载本文档，本文档来源于互联网，如有侵权请联系删除！我们将竭诚为您提供优质的文档！第 13 页 共 22 页 now,as I near the end of my fourth decade,I realize work can be fully functional and entirely fulfilling without needing to be best mates with the people sitting next to you.In an academic analysis just publis

48、hed in the profoundly-respected Journal of Management,researchers have looked at the concept of indifferent relationships.Its a simple term that encapsulates（概 括）the fact that relationships at work can reasonably be non-intimate,inconsequential,unimportant and even,dare I say it,disposable or substi

49、tutable.Indifferent relationships are neither positive nor negative.The limited research conducted thus far indicates theyre especially dominant among those who value independence over cooperation,and harmony over confrontation.Indifference is also the preferred option among those who are socially l

50、azy.Maintaining relationships over the long term takes effort.For some of us,too much effort.As noted above,indifferent relationships may not always be the most helpful approach in resolving some of the issues that pop up at work.But there are nonetheless several empirically proven benefits.One of t