单选题Do you remember all those years when scientists argued that smoking would kill us but the doubters insisted that we didn't know for sure? That the evidence was inconclusive, the science uncertain? That the antismoking lobby was out to destroy our way of life and the government should stay out of the way? Lots of Americans bought that nonsense, and over three decades, some 10 million smokers went to early graves. There are upsetting parallels today, as scientists in one wave after another try to awaken us to the growing threat of global warming. The latest was a panel from the National Academy of Sciences, enlisted by the White House, to tell us that the Earth's atmosphere is definitely warming and that the problem is largely man-made. The clear message is that we should get moving to protect ourselves. The president of the National Academy, Bruce Alberts, added this key point in the preface to the panel's report: "Science never has all the answer. But science does provide us with the best available guide to the future, and it is critical that our nation and the world base important policies on the best judgments that science can provide concerning the future consequences of present actions. " Just as on smoking, voice now come from many quarters insisting that the science about global warming is incomplete; that it's OK to keep pouring fumes into the air until we know for sure. This is a dangerous game: by the time 100 percent of the evidence is in, it may be too late. With the risks obvious and growing, a prudent people would take out an insurance policy now. Fortunately, the White House is starting to pay attention. But it's obvious that a majority of the president's advisers still don't take global warming seriously. They continue to press for more research, a classic of "paralysis by analysis". To serve as responsible stewards of the planet, we must press forward on deeper atmospheric and oceanic research. But research alone is inadequate. If the Administration won't take the legislative initiative, Congress should help to begin fashioning conservation measures. A bill by Democratic Senator Robert Byrd of West Virginia, which would offer financial incentives for private industry, is a promising start. Many see that the country is getting ready to build lots of new power plants to meet our energy needs. If we are ever going to protect the atmosphere, it is crucial that those new plants be environmentally sound.

单选题Excessive ______ in sweets and canned drinks and the lack of availability of fresh fruit and vegetables in the house can teach poor eating patterns. A. aspiration B. intolerance C. exposure D. indulgence

单选题Some would consider that Uan infringement/U of good manners whereas others would not.

单选题With a weather worn face, Ted is ______ a very old man but in fact he is only fifty. A. obviously B. evidently C. apparently D. sufficiently

单选题He did not like abstract painting (at all), so (the more) he looked at the drawings (exhibited) in the art gallery, (the little) he liked them.

单选题Ricardo has shown great ______ in his determination to understand the theory of relativity.

单选题{{B}}Passage Five{{/B}} A new look at an asteroid orbiting the sun shows it could possibly smash into the Earth with tremendous force. But experts say the potential impact is still 872 years away, time enough for the speeding space rock to alter its course. Named 1950DA, the asteroid--1 kilometer wide--is the most threatening to the Earth of all of the known large asteroids, but the odds are only adout one in 300 that it would impact the planet, researchers said. "One in 300 is pretty long odds," said Jon D. Giorgini, a scientist in Califonia. "I'm not personally going to worry about it. It is so far in the future that lots of things could change." There are approximately 1,000 asteroids bigger than a kilometer that can pass near the Earth in their orbit of the sun. About 580 have been found and their orbits plotted. Of these, only 1950DA represents a possible threat. Scientists continue an effort to identify all the other large asteroids that pass near the Earth, and it is their great hope that they don't find any that are greater threats. If 1950DA did hit the Earth, said Giorgini, it would have planet-wide effects, setting off fires, changing the weather and perhaps creating immense tidal waves. But it would not be a planet killer like the asteroid thought to have snuffed out the dinosaure some 65 millions years ago. Asteroid 1950DA was first discovered in 1950, but then not noted in astronomy logs again for decades. It was rediscovered in the year 2000 and in March 2001 whizzed within about 77 million miles of Earth, giving astronomers an opportunity to gather visual and radar readings. From that, the astronomers projected the orbital path 1950DA would take on its next 15 near passes of the Earth--over a period covering nearly nine centuries. For the 15th near pass, on March 16,2880, the analysis showed it was mathematically possible, though unlikely, that the asteroid could hit the Earth. He said the highest probability is that the asteroid in 2880 will miss the Earth by about 290, 000 kilometers--a distance closer than the 370, 000-kilometer orbit of the Moon around the Earth.

单选题The team leader of mountain climbers marked out______ A. that seemed to be the best route B. what seemed to be the best route C. which seemed to be the best route D. something that to be the best route

单选题Must I wait till you come back? No, you______.(中国矿业大学2010年试题)

单选题They seized Belgrade, though only after having encountered a stubborn ______.

单选题Although tile media have paid a great deal of attention to telecommuting, in most cases it is the employee's situations, not the availability of technology, that ______ a telecommuting arrangement.

单选题A child learning to talk does not learn by being corrected all the time; if corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language as other people's. A. by being corrected B. corrected C. the difference D. as other people's.

单选题The government claimed that it was accidental, but the hollow and______excuse could not convince the public.(复旦大学2010年试题)

单选题Since you have already come, you______stay here for a couple of days.

单选题For companies, the threat of drive-by hacking seems set to grow as software programs assisting hackers {{U}}proliferate{{/U}} on the Internet.

单选题From the beginning of the passage we can infer that the author ______.

单选题George ______ some important sentences by underlining them with a red pen. A. highlighted B. upgraded C. capable D. eligible

单选题Although architecture has artistic qualities, it must also satisfy a number of important practical ______.

单选题The (military aspect) of the (United States Civil War) has always attracted the (most attention) (from scholar).