单选题The word "unsurpassed" in the third paragraph is closest in meaning to______.

单选题Whatdowelearnfromthewoman'sreply?

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单选题The 47-year-old politician rose to the highest post because of his stand against the war in Iraq and his plans to fix a weak economy. But what will the first 47-year-old African- American president do for race relations? Obama's victory appears to have given blacks and other minorities a true national role model. For years, many looked to athletes and musicians for inspiration. As Darius Turner, an African-American high school student in Los Angeles, told The Los Angeles Times, "Kobe doesn't have to be everybody's role model any more." Recent polls also suggest that Obama's victory has given Americans new optimism about race relations. For example, a USA Today poll found that two-thirds of Americans believe relations between blacks and whites "will finally be worked out". This is the most hopeful response since the question was first asked during the civil rights revolution in 1963. However, it's still too early to tell whether Obama's presidency will begin to solve many of the social problems facing low-income black communities. Although blacks make up only 13 percent of the US population, 55 percent of all prisoners are African-American. Such numbers can be blamed on any number of factors on America's racist past, a failure of government policy and the collapse of the family unit in black communities. It is unlikely that Obama will be able to reverse such trends overnight. However, Bill Bank, an expert of African-American Studies, says that eventually young blacks need to find role models in their own communities. "That's not Martin Luther King, and not Barack Obama," he told The Los Angeles Times. "It's actually the people closest to them. Barrack only has so much influence." In the opinion of black British politician Trevor Phillips, Obama's rise will contribute more to multiculturalism than to race relations in the US. "When the G8 meets, the four most important people in the room will be the president of China, the prime minister of India, the prime minister of Japan and Barrack Obama," he told London's The Times newspaper. "It will be the first time we've seen that on our television screens. That will be a huge psychological shift(心理转变) for both the white people and the colored ones in the world./

单选题Howmuchwillthemanhavetopayifhebuystwopens.'?

单选题Some surveys show that a lot of people believe that the glare from snow causes snow-blindness. Yet, wearing dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snow-blindness, when exposed to several hours of "snow light". The United States Army has now determined that glare from snow actually does not cause snow-blindness in troops in snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of a wide snow-covered territory. His gaze, in consequence, continually shifts and jumps back and forth over the entire landscape in search of something he can look at. Finding nothing to focus on, hour after hour, the eyes never stop searching, and the eyeballs will become sore and eye muscles will ache. Nature reduces this uncomfortable feeling by producing more and more fluid which covers the eyeball. The fluid covers the eyeball in increasing quantity until vision becomes increasingly unclear. The result may be total, even though temporary, snow-blindness. Experiments led the Army to a simple method of overcoming this problem. A small group of soldiers will be sent ahead of a main body of troops. They are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even these soldiers themselves throw lightweight, dark colored objects ahead, on which they, too, can focus. The men following them can then see something. Their gaze is arrested. Their eyes focus on a bush and, having found something to see, stop searching the snow-blanketed landscape. By focusing their attention on lone object at a time, the troops can cross the snow-covered wilderness without becoming hopelessly snow-blind or lost. In this way the problem of crossing a solid white territory is overcome.

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单选题Sleep is a funny thing. We're taught that we should get seven or eight hours a night, but a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from sleeping soundly. Doctors have their own special sleep problems. Residents are famously short of sleep. It is not unusual for them to work 40 hours in a row without rest. They are not in the least worried about it, confident they can still deliver the highest quality of medical care. But an article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person s motor performance is comparable to that of someone who is drunk. Curiously, surgeons who believe that operating under the influence of alcohol is grounds for sacking often don't think twice about operating without enough sleep. "I could tell you horror stories," says Jaya Agrawal, president of the American Medical Student Association, Which runs a website for residents. Some are terrifying. "I was operating after being up for over 36 hours," one writes. "I literally fell asleep standing up and nearly planted my face into the wound." "Practically every surgical resident I know has fallen asleep at the wheel driving home from work." writes another. "I know of three who have hit parked cars. Another hit a ' Jersey gate' on the New Jersey Expressway, going 105km/h." "Your own patients have become the enemy," writes a third, because they are "the one thing that stands between you and a few hours of sleep." The U.S. controls the hours of pilots and truck drivers. But until such a system is in place for doctors, patients are on their own. If you're worded about the people treating you or a loved one, you should feel free to ask how many hours of sleep they have had and if more rested staffers are available.

单选题Mr. Baker liked shooting very much but he was never good at it. A month ago some of his friends visited him in his house and saw a new target (靶子) which Baker had put several days before in his garden. His friends went nearer and looked at this beautiful target. There was a hole right in the middle of the target. When they asked who had shot the target, Baker said he had. They all laughed and said, "How far away were you, Baker? Two feet?" But Baker said he was fifty yards (码) away. Then Mr. Baker's wife explained about the hole in the middle. She said, "Baker went to a shop and bought a very big piece of wood. He brought it home in a car, put it in the garden and shot at it from fifty yards away. Then he drew a target round the hole and cut the wood./

单选题{{B}}Text 3{{/B}} The technology of the North American colonies did not differ strikingly from that of Europe, but in one respect, the colonists enjoyed a great advantage．Especially by comparison with Britain，Americans had a wonderfully plentiful supply of wood． The first colonists did not, as many people imagine, find an entire continent covered by a continuous forest．Even along the Atlantic seaboard, the forest was broken at many points．Nevertheless, all sorts of fine trees abounded, and through the early colonial period, those who pushed westward encountered new forests．By the end of the colonial era, the price of wood had risen slightly in eastern cities, but wood was still extremely abundant． The availability of wood brought advantages that have seldom been appreciated． Wood was a foundation of the economy．Houses and all manner of buildings were made of wood to a degree unknown in Britain．Secondly, wood was used as a fuel for heating and cooking．Thirdly, it was used as the source of important industrial compounds, such as potash, an industrial alkali; charcoal, a component of gunpowder, and tannic acid, used for tanning leather． The supply of wood conferred advantages but had some negative aspects as well． Iron at that time was produced by heating iron ore with charcoal．Because Britain was so stripped of trees，she was unable to exploit her rich iron mines．But the American colonies had both iron ore and wood；iron production was encouraged and becamesuccessful. However, when Britain developed coke smelting, the colonies did not follow suit because they had plenty of wood and besides, charcoal iron was stronger than coke iron．Coke smelting led to technological innovations and was linked to the emergence of the Industrial Revolution．In the early nineteenth century, the former colonies lagged behind Britain in industrial development because their supply of wood led them to cling to charcoal iron．

单选题That afternoon Molly almost danced along the street, as she walked home with her father from the station. They had seen Mrs. Gibson and Cynthia off to London. She wished her step - mother would take herself off to London much more often. "Well now, Dad." she said, "I'm going to have you all to my- self for a whole week. You must be very obedient." "I hope you aren' t going to boss me, Molly. You' re walking me out of breath already. We mustn' t pass Mrs. Goodmays in our hurry." They crossed the street to speak to Mrs. Goodmays, one of the doctor' s patients. "We' ve just been seeing my wife and her daughter off to London. They've gone up for a week." "Dear me, to London, and only for a week!" said Mrs. Goodmays, with surprise. "It seems hardly worth the packing. It'll be lonely for you, Molly, without your stepsister." "Yes," said Molly, suddenly feeling as if she ought to have taken this view of the case. "I' 11 miss Cynthia." "And you, Dr. Gibson, I hope you won' t feel like widower once again. You must come and have supper with me one evening. What about Tuesday?" Dr. Gibson felt a sharp blow on his leg from the toe of Molly' s shoe, but even so he accepted the invitation, much to the old lady' s satisfaction. A moment later Molly said to him, "How could you go and waste one of our precious evening! We' ve only got five now. I' ve been planning all sorts of things for us to do tonight." "What sort of things'?." "Oh, I don' t know. Things you used to like." She looked at him boldly. "Forbidden things now." Her father's eyes lit up, but his face remained serious. "I'm not going to be pulled down, Molly. With hard work and sensible guidance I' ye reached a very fair height of civilized behavior, and there I' m going to stay." "Oh, no, you' re not. We' re having bread and cheese for sup per tonight, in armchairs in front of the TV ! And you shall wear your dressing - gown at breakfast tomorrow--and every morning for a week ! And you shall read the paper at the dining-table f That' s only a start. I haven' t finished by a long way yet./

单选题What'stheairportlike?A.Ahotel.B.Amarket.C.Amadhouse.D.Ahospital.