The ISS orbits Earth at an average of 250 miles from the surface of Earth and completes 15.5 circles per day, once every 92 minutes. In other words, the astronauts see the sunrise and sunset 16 times every day!
The station is inhabited by astronauts conducting research in various fields, while also using it as an observatory to explore Earth and outer space. It is also intended to be a transportation center for spacecraft that are bound for the Moon, Mars and other interplanetary voyages.
The crew is not only responsible for the scientific experimentation and research being conducted onboard, but also the upkeep and maintenance of the vessel, a vessel that is continuously in motion and exposed to the worst possible elements. Such conditions are significant area of study for researchers.
The most common effect of space is the initial contact — getting used to such an alien environment. Astronauts are often seen to display anxiety or depression as they adjust to the novelty of space, according to post-psychiatric screenings of astronauts. Other causes of stress are the high pressure of work while being under frequent public observation, being away from home and family, and missing important events.
Sleep is another major factor that affects the mood and efficiency of the astronauts. Due to the irregularity in life and the constant rotation of sunrise and sunset, the circadian rhythm of the astronauts goes completely haywire, resulting in poor quality of sleep. The shuttle itself is noisy, with essential equipment always in operation to sustain the vessel. Half of all the astronauts onboard rely on sleeping pills to get some rest and manage to get an average 2 hours less sleep than when they’re back on Earth. Sleep is so critical for functionality that 50% of all medicines taken by astronauts in orbit is to help them sleep better. Low-Earth Orbit living is a restless endeavor, indeed.
1. Which of the following is most likely to affect the astronauts’ mood?A.Scientific experiments onboard. |
B.Observation of outer space. |
C.Interplanetary voyages. |
D.Exposure to extreme conditions. |
A.Return to normal. | B.Become out of control. |
C.Go unnoticed. | D.Remain unchanged. |
A.Highly-pressured. | B.Trouble-free. |
C.Safe and sound. | D.Quiet and beautiful. |
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Any society which is interested in equality of opportunity and standards of achievement must regularly test its pupils. The standards may be changed — no examination is perfect — but to have no tests or examination would mean the end of equality and of standards. There are groups of people who oppose this view and who do not believe either in examinations or in any controls in schools or on teachers. This would mean that everything would depend on luck since every pupil would depend on the efficiency, the values and the purpose of each teacher.
Without examinations, employers will look for employees from the highly respected schools and from families known to them — a form of favoritism will replace equality at the moment. The bright child from an ill-respected school can show certificates to prove he or she is suitable for a job, while the lack of certificate indicates the unsuitability of a dull child attending a well-respected school. This defense of excellence and opportunity would disappear if examinations were taken away, and the bright child from a poor family would be a prisoner of his or her school’s reputation, unable to compete for employment with the child from the favored school.
The opponents(反对者) of the examination system suggest that examinations are an evil force because they show differences between pupils. According to these people, there must be no special, different, academic class. They have even suggested that there should be no form of difference in sport or any other area: all jobs or posts should be filled by unsystematic selection. The selection would be made by people who themselves are probably selected by some computer.
1. The word “favoritism” in paragraph 3 is used to describe the phenomenon that .
A.bright children also need certificates to get satisfying jobs. |
B.poor children with certificates are favoured in job markets. |
C.children from well-respected schools tend to have good jobs. |
D.children attending ordinary schools achieve great success. |
A.Schools for bright children would lose their reputation. |
B.There would be more opportunities and excellence. |
C.Children from poor families would be able to change their schools. |
D.Children’s job opportunity would be affected by their school reputation. |
A.jobs should not be assigned by systematic se lection |
B.computers should be selected to take over many jobs. |
C.special classes are necessary to keep the school standards |
D.schools with academic subjects should be done aw ay with |
A.schools and certificates |
B.examination and equality |
C.opportunity and employment |
D.standards and reputation |
【推荐2】If a diver surfaces too quickly, he may suffer the bends. Nitrogen(氮) dissolved(溶解) in his blood is suddenly liberated by the reduction of pressure. The consequence, if the bubbles (气泡)accumulate in a joint, is sharp pain and a bent body—thus the name. If the bubbles form in his lungs or his brain, the consequence can be death.
Other air-breathing animals also suffer this decompression(减压) sickness if they surface too fast: whales, for example. And so, long ago, did ichthyosaurs. That these ancient sea animals got the bends can be seen from their bones. If bubbles of nitrogen form inside the bone they can cut off its blood supply. This kills the cells in the bone, and consequently weakens it, sometimes to the point of collapse. Fossil (化石)bones that have caved in on them selves are thus a sign that the animal once had the bends.
Bruce Rothschild of the University of Kansas knew all this when he began a study of ichthyosaur bones to find out how widespread the problem was in the past. What he particularly wanted to investigate was how ichthyosaurs adapted to the problem of decompression over the 150 million years. To this end, he and his colleagues traveled the world’s natural-history museums, looking at hundreds of ichthyosaurs from the Triassic period and from the later Jurassic and Cretaceous periods.
When he started, he assumed that signs of the bends would be rarer in younger fossils, reflecting their gradual evolution of measures to deal with decompression. Instead, he was astonished to discover the opposite. More than 15% of Jurassic and Cretaceous ichthyosaurs had suffered the bends before they died, but not a single Triassic specimen(标本) showed evidence of that sort of injury.
If ichthyosaurs did evolve an anti-decompression means, they clearly did so quickly—and, most strangely, they lost it afterwards. But that is not what Dr Rothschild thinks happened. He suspects it was evolution in other animals that caused the change.
Whales that suffer the bends often do so because they have surfaced to escape a predator (捕食动物) such as a large shark. One of the features of Jurassic oceans was an abundance of large sharks and crocodiles, both of which were fond of ichthyosaur lunches. Triassic oceans, by contrast, were mercifully shark- and crocodile-free. In the Triassic, then, ichthyosaurs were top of the food chain. In the Jurassic and Cretaceous, they were prey(猎物) as well as predator—and often had to make a speedy exit as a result.
1. Which of the following is a typical symptom of the bends?A.A twisted body. | B.A gradual decrease in blood supply. |
C.A sudden release of nitrogen in blood. | D.A drop in blood pressure. |
A.how often ichthyosaurs caught the bends | B.how ichthyosaurs adapted to decompression |
C.why ichthyosaurs bent their bodies | D.when ichthyosaurs broke their bones |
A.confirmed his assumption | B.speeded up his research process |
C.disagreed with his assumption | D.changed his research objectives |
A.failed to evolve an anti decompression means |
B.gradually developed measures against the bends |
C.died out because of large sharks and crocodiles |
D.evolved an anti decompression means but soon lost it |
【推荐3】The MacArthur Foundation late last month announced its latest crop of “genius grants”, and once again you thought maybe, just maybe, this was your year.
And why not? These days, we’re all geniuses. We might be “marketing geniuses” or “cooking geniuses” or “TV geniuses”. We have so weakened “genius” that it’s fast joining the company of “natural” and “mindful” (留心), words left inactive through overuse and misuse.
Admittedly, the word is tough to nail down. Sometimes we assume genius equivalent to raw intelligence. But many of humanity’s greatest breakthroughs were achieved by those with only modest IQs.
Sometimes we think of the genius as someone extremely knowledgeable, but that definition also falls short. During Albert Einstein’s time, other scientists knew more physics than Einstein did, but history doesn’t remember them. That’s because they didn’t make use of that knowledge the way Einstein did. They weren’t able to, as he put it, “regard old questions from a new angle”.
The genius is not a know-it-all but a see-it-all, someone who, working with the material available to all of us, is able to make surprising and useful connections. True genius involves not merely an extra advance, but a conceptual leap. As philosopher Arthur Schopenhauer put it: Talent hits the target no one else can hit; genius hits the target no one else can see.
We’ve lost sight of this truth, and too often grant the title of genius on talented people hitting visible targets. A good example is the much-boasted announcement earlier this year that scientists had, for the first time, recorded the sound of two black holes bumping, a billion light-years away. It was a remarkable discovery, no doubt, but it did not represent a dramatic shift in how we understand the universe. It merely confirmed Einstein’s general theory of relativity.
As Plato observed, “What is honored in a country is cultivated there.” What do we honor? Digital technology, and the convenience it represents, so naturally we get a Steve Jobs or a Mark Zuckerberg as our “geniuses”, which, in point of fact, they aren’t.
The iPhone and Facebook are wonderful inventions. In many ways, they make our lives a bit easier, a bit more convenient. If anything, though, a true genius makes our lives more difficult, more unsettled. William Shakespeare’s words provide more anxiety than relief, and the world felt a bit more secure before Charles Darwin came along. Zuckerberg and Jobs may have changed our world, but they haven’t yet changed our worldview.
We need to recover genius, and a good place to start is by putting the brakes on Genius Flooding.
1. The key factor that sets geniuses and talents apart is that ________.A.geniuses have a larger range of knowledge | B.geniuses have access to far more resources |
C.geniuses can see visible targets | D.geniuses approach things differently |
A.their achievements bring people convenience |
B.they have extraordinary intelligence |
C.they are native to the country where digital technology is highly valued |
D.they satisfy people’s needs in the age of high technology |
A.We should stop the improper use of “natural” and “mindful”. |
B.The first recording of two black holes bumping each other is a genius breakthrough. |
C.Charles Darwin is hardly a genius. |
D.More geniuses remain to be found in our life. |
A.Get a new word, genius | B.Learn from a new model, genius |
C.Join in a new group, genius | D.Make a new friend, genius |
【推荐1】200,000 miles from Earth, the crew (机组成员) of the third manned mission (飞行任务) to the Moon faced an astronaut’s worst nightmare: an explosion on the spacecraft. It’s what happened in the Oscar-winning film Apollo 13, but it’s also a true story.
The lift-off of Apollo 13 took place on 11th April 1970. Two days into the mission, the three-man crew were in big trouble. They had been carrying out routine checks when there was a loud bang. Warning lights were starting to flash. Looking out into space, they could see a trail of gas — the spacecraft was leaking (漏) oxygen. They sent out a short message to the scientists back on Earth: “Houston, we’ve had a problem here.” At first, they thought that a meteor (流星) had hit them, but they later found out that a short circuit (短路) had caused an oxygen container to explode. Whatever the cause, they knew there was no time to lose. Their electricity supply in the command module (指令舱) depended on that oxygen and pretty soon they would run out of both.
The only solution was to move into the lunar module — the section of the spacecraft that would have landed on the Moon. Now though, they were using it as a kind of lifeboat. With its own power supply, oxygen and water, the three men could survive in the lunar module and return to Earth. There was another problem though. In an enclosed space like a lunar module, the carbon dioxide the crew was breathing out was dangerous. The equipment to clear the air of carbon dioxide was only built for two people. Now it had to deal with three. Amazingly, the crew managed to build an adapter out of materials onboard to reduce the carbon dioxide to a safe level.
There was one final obstacle. The lunar module wasn’t strong enough to reenter Earth’s atmosphere so the crew had to go back into the damaged command module. To everyone’s relief, the crew of Apollo 13 arrived safely in the South Pacific Ocean on April 17th. Although the crew didn’t land on the Moon, NASA still considered the mission a success.
1. What was the astronauts’ first reaction to the explosion?A.They went out to land on the Moon. |
B.They informed scientists on Earth. |
C.They moved into the lunar module. |
D.They looked into the cause of the explosion. |
A.By moving back to the command module. |
B.By lowering the carbon dioxide level. |
C.By creating a new oxygen supply. |
D.By limiting the oxygen use. |
A.Step. | B.Choice. | C.Problem. | D.Solution. |
A.A successful mission | B.An amazing adventure |
C.Deep space exploration | D.Life and death drama in space |
【推荐2】An analysis of 5.4 grammes of stones and dust that a Japanese Hayabusa-2 spacecraft gathered from Ryugu, an asteroid (小行星) near Earth, has discovered a surprising component: a drop of water. The discovery offers new support for the theory that life on Earth may have originated from outer space.
Hayabusa-2 was launched in 2014 on its mission to Ryugu, and returned to Earth’s orbit two years ago to drop off a capsule containing the sample. The sample has been divided among different scientific teams to maximize the chance of new discoveries. The precious cargo has already produced several results, including organic materials that showed some of the building blocks of life on Earth, amino acids, may have been formed in space.
The lead scientist, Tomoki Nakamura of Tohoku University and his team, which is made up of about 150 researchers from the US, Britain, France, Italy and China, also analyzed the sample from Ryugu. The team’s latest discovery was a drop of water containing salt and organic matter. “This drop of water has great meaning. Many researchers believe that water was brought from outer space, but we actually discovered water in Ryugu for the first time,” Nakamura said.
That bolsters the theory that asteroids such as Ryugu, or its larger parent asteroid, could have provided water, which contains salt and organic matter in collisions(碰撞) with Earth. “Such discovery may have been directly linked to the origin of the oceans or organic matter on Earth,” Nakamura said.
Kensei Kobayashi, a scientist who is not part of the research group, applauded the discovery. “The fact that water was discovered in the sample itself is surprising, given the chances of it being destroyed in outer space. It does suggest that the asteroid contained water, in the form of fluid and not just ice, and organic matter may have been generated in that water,” Kobayashi said.
1. What did Nakamura’s team find lately?A.Ryugu moves near the earth. |
B.Ryugu accommodates fluid water. |
C.Organic matter exists in sample water. |
D.Amino acids come into being in space. |
A.Supports. | B.Doubts. | C.Advances. | D.Tests. |
A.It draws attention to amino acids. | B.It proves the mission to Ryugu a success. |
C.It offers clues to origins of life on Earth. | D.It promises a bright future for space exploration. |
A.Critical. | B.Skeptical. | C.Objective. | D.Favorable. |
This idea may sound like something from a science fiction (科幻小说), but it is actually being taken seriously by many researchers. This suggests the future for the "red planet" will be the main topic for discussion at an international conference hosted by NASA (美国宇航局) this week. Leading researchers as well as science fiction writers will attend the event.
Turning Mars into a little earth has long been a topic in science fiction,” said Dr Michael Meyer, NASA's senior scientist for astrobiology (太空生物学).“Now, with scientists exploring the reality, we can ask what are the real possibilities of changing Mars.”
Most scientists agree that Mars could be turned into a little earth, although much time and money would be needed to achieve this goal.
But many experts are shocked by the idea. "We are destroying our own world at an unbelievable speed and now we are talking about ruining another planet," said Paul Murdin from the Institute of Astronomy, Cambridge, UK.
Over the past months, scientists have become increasingly confident .They will find Martian life forms. Europe and America's robot explorers have found proof that water, mixed with soil, exists in large amounts on the planet.
1. The passage is about________.
A.Mars supporting life |
B.finding water in the Mars |
C.a plan turning Mars into a little earth |
D.the necessity of changing Mars |
A.are short of confidence |
B.will gain the support of NASA |
C.are asking for advice on how to carry it out |
D.realize that it’s not easy to achieve their goal |
A.He is for the idea. |
B.He is active in the idea. |
C.He is against the idea. |
D.He doesn’t care about it. |
A.They have no idea about the plan. |
B.They will find Martian lives very soon. |
C.They may achieve their goals some day. |
D.They have found much proof of Martian lives. |