英语六级(第3套).doc

2019年6月英语六级（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 team spirit and communication in the workplace.You should write at least 150 words but no more than 200 words.Part Ⅲ Reading Comprehension (40 minutes) Section AQuestions 26 to 35 are based on the following passage.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 of steel has been developed that resists 27 at much lower temperatures, while retaining its strength and toughness - without the need for expensive 28 .Steel's 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 2700-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 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 such 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 strength and toughness that is 33 to that of modem steels that are very rich in alloy content and, therefore, very expensive.Kimura's 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 weight - by 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 B) additives C) approach D) ardently E) besieged F) channel G) comparable H) componentsI) cracked J) fractures K) hollow L) relevantM) reshuffled N) strived O) violentSection BThe future of personal satellite technology is here - are we ready for it?A) Satellites used to be the exclusive playthings of rich governments and wealthy corporations. 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 National 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“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 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 fits the bill: CubeSats. The“Cube”here simply refers to the satellite's 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 vehicle's formerly“wasted space.”Multiples can be deployed 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. They're 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 its future Earth-escaping payloads (to the moon and Mars especially) to carry CubeSats.E) Because they're so small and light, it costs much less to get a CubeSat into Earth's orbit than a traditional communications or GPS satellite. For instance, 。