2019.6月英语六级真题(共12页).docx

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1、精选优质文档-倾情为你奉上2019年6月大学英语六级考试真题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 can cite examples to illustrate your views.You should write at least 150 words but no more than 200 words._Par

2、t Listening Comprehension (30 minutes)Part Reading Comprehension (40 minutes)Section ADirections:In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through careful

3、ly before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item onAnswer Sheet 2with 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

4、 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 of steel has been developed that resists 27 at much lower temperatures, while retaining its strength and toughness without the need for expensive

5、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 ships, a 2,700-strong fleet of cheap-and-cheerful“Liberty ships”was introduced to replace the lost vessels, providing a lifeline for the 29 Briti

6、sh. 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 steel 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 s

7、uch as nickel.Yuuji Kimura and colleagues in Japan tried a more physical 32 . Rather than adding 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 s

8、trength and toughness that is 33 to that of modem steels that are very rich in alloy content and, 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 th

9、eir weightby replacing solid supports with 35 tubes, for example. This could reduce the amount of steel needed to make everything from automobiles to buildings and bridges.A) abruptly I) crackedB) additives J) fracturesC) approach K) hollowD) ardently L) relevantE) besieged M) reshuffledF) channel N

10、) strivedG) comparable O) violentH) componentsSection BDirections: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 pa

11、ragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter onAnswer 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 corporati

12、ons. But increasingly, as space becomes more democratized, 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.B) As a recent report from the Natio

13、nal 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?”b

14、ut“Should 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

15、from a nonprofit 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 f

16、its the bill: 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 depl

17、oyed in combination for more complex 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 space, as well as space around Earth. Theyre

18、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 distant orbits; NASA plans for most of i

19、ts 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 CubeSat into Earths orbit than a traditional communications or GPS satellite. For instance, a research group here at Arizona State University recent

20、ly claimed their developmental small CubeSats could cost as little as $3,000 to put in orbit. This decrease in cost a11ows 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 was created in the ear

21、ly 2000s, as a way of enabling Stanford graduate students to design, build, 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 even Boeing have all launched and operated CubeSats. There arc more than 130 c

22、urrently 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 just for rocket scientists anymore.G) The National Academy of Sciences

23、 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-flee. The greatest concern the authors raise is space debrispieces of“junk”that orbit the earth, wit

24、h 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 increasing threat. As the report authors point out, even near-misses

25、might lead to the“creation of a burdensome regulatory framework and affect the future disposition of science CubeSats.”I) CubeSat researchers suggest that nows the time to ponder unexpected and unintended possible consequences of more people than ever having access to their own small slice of space.

26、 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 doing? Some“expert amateurs”in the satellite game could provide some inspiration for how to proceed responsibly.J) In 1

27、969, 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 efforts, begun in 1961, by Project OSCARa U.S.-based group that built and launched the very first nongovernmental s

28、atellite 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 learned a thing or two about responsibility. Here, open.source development has been a central principle, W

29、ithin the organization, AMSAT has a philosophy of open sourcing everythingmaking technical data on all aspects of their satellites fully available to 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 mea

30、ns that theres no way to sneak something like explosives or an energy emitter into an amateur satellite when everyone has access to the designs and implementation.K) However, theyre more cautious about sharing information with nonmembers, as the organization guards against others developing the abil

31、ity to hijack and take control of their satellites. This form of“self-governance”is possible within long-standing amateur organizations that, over time, 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

32、 have deep roots within the existing culture?L) Hobbyists and students are gaining access to technologies without being part of a long-standing amateur establishment. Theyre still constrained by funders, launch providers and a series of regulationsall of which rein in what CubeSat developers can and

33、 cannot do. But theres a danger theyre ill-equipped to think through potential unintended consequences. What these unintended consequences might be is admittedly far from clear. Yet we know innovators can be remarkably creative with taking technologies in unexpected directions. Think of something as

34、 seemingly benign as the cellphonewe have microfinance and text-based social networking at one end 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 importantnot simply to ensure that physical risks are

35、minimized, but to engage with a much larger community in anticipating and managing less obvious consequences 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

36、 technologies. The challenge here, of course, is ensuring that what an amateur community considers to be responsible, 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 any

37、one who may potentially stand to be affected by the use of CubeSat technology.36. Given the easier accessibility to space, it is time to think about how to prevent misuse of satellites.37. A group of mini-satellites can work together to accomplish more complex tasks.38. The greater accessibility of

38、mini-satellites increases the risks of their irresponsible use.39. Even school pupils can have their CubeSats put in orbit owing to the lowered launching cost.40. AMSAT is careful about sharing information with outsiders to prevent hijacking of their satellites.41. NASA offers to launch CubeSats fre

39、e of charge for educational and research purposes.42. Even with 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

40、vehicles.44. Mini-satellites enable operators to study Earth from LEO 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 CDirections:There are 2 passages in this section.Each passage i

41、s followed by some questions or unfinished statements. 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 2with a single line through the centre.Passage OneQuestions 46 to 50 are based on the followi

42、ng passage.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, bein

43、g friends with 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) t

44、ies can help overcome 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

45、time I was in that kind of office environment. Whereas 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 published in the profoundly-respected Jo

46、urnal 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 substitutable.Indifferent relat

47、ionships 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 lazy. 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 s