单选题The study shows that the longer you sleep each night, the' longer you'll live.

单选题Ethnic Tensions in Belgium Belgium has given the world Audrey Hepburn, Ren6 Magritte (surrealist artist), the saxophone (萨克斯管) and deep-fried potato chips that are somehow called French. But the story behind this flat, twice-Beijing-size country is of a bad marriage between two nationalities living together that cannot stand each other. With no new government, more than a hundred days after a general election, rumors run wild that the country is about to disappear. "We are two different nations, an artificial state. With nothing in common except a king, chocolate and beer," said Filip Dewinter, the leader of the Flemish Bloc, the extreme-right Flemish party. Radical Flemish separatists like Mr Dewinter want to divide the country horizontally along ethnic and economic lines: to the north, Flanders—where Dutch (known locally as Flemish) is spoken and money is increasingly made; to the south, French-speaking Wallonia, where today old factories dominate the landscape. The area of present-day Belgium passed to the French in the 18th century. Following the defeat of Napoleon in 1815, Belgium was given to the kingdom of the Netherlands, from which it gained independence as a separate kingdom in 1830. Since then, it has struggled for cohesion (结合). Anyone who has spoken French in a Flemish city quickly gets a sense of the mutual hostility that is part of daily life there. But there are reasons Belgium is likely to stay together, at least in the short term. The economies of the two regions are tightly linked, and separation would be a financial nightmare. But there is also deep resentment in Flanders that its much healthier economy must subsidize (补贴) the south, where unemployment is double that of the north. French speakers in the south, meanwhile, favor the status quo (现状). Belgium has made it through previous threats of division. Although some political analysts believe this one is different, there is no panic just now. "We must not worry too much," said Baudouin Bruggeman, a 55-year-old school-teacher. "Belgium has survived on compromise since 1930. You have to remember that this is Magritte"s country, the country of surrealism. Anything can happen."

单选题The sisters can't {{U}}tolerate{{/U}} each other.

单选题We should never Ucontent/U ourselves with a little knowledge only.

单选题Mom's Traffic Accidents They bicycling craze came in when we were just about at the right age to enjoy it. At first even "safety" bicycles were too dangerous and improper for ladies to ride,and they had to have tricycles. My mother had(I believe) the first female tricycle in Cambridge;and I had a little one,and we used to go out for family rides,all together;my father in front on a bicycle,and my poor brother Charles standing miserable on the bar behind my mother. I found it very hard work,pounding away on my hard tyres;a glorious, but not a pleasurable pastime. Then,one day at lunch,my father said he had just seen a new kind of tyre,filled up with air, and he thought it might be a success. And soon after that everyone had bicycles, ladies and all;and bicycling became the smart thing, and the lords and ladies had their pictures in the papers, riding along in the park, in straw boater hats. My mother must have fallen off her bicycle pretty often, for I remember seeing the most appalling cuts and bruises on her legs. But she never complained, and always kept these mishaps to herself. However,the great Mrs. Phillips,our cook,always knew all about them;as indeed she knew practically everything that ever happened. She used to draw us into the servants' hall to tell us privately: "Her Ladyship had a nasty fall yesterday; she cut both her knees and sprained her wrist. But don't let her know I told you. "So we never dared say anything. Similar little accidents used to occur when, at the age of nearly seventy, she insisted on learning to drive a car. She never mastered the art of reversing,and was in every way an unconventional and terrifying driver. Mrs, Phillips used then to tell us:" Her Ladyship ran into the back of a milk-cart yesterday;but it wasn't much hurt";or "A policeman stopped her Ladyship because she was on the wrong side of the road;but she said she didn't know what the white line on the road meant, so he explained and let her go on. "Mrs Phillips must have had an excellent Intelligence Service at her command,for the stories were always true enough.

单选题Smart Window Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch. "It took us a long time to figure out what a window really is," says Claes Granqvist. He"s a professor of solid-state physics at Uppsala University in Sweden. "It"s contact with the outside world. You have to have visual contact with the surrounding world to feel well." So, windows and natural light are important for improving the way people feel when they"re stuck indoors. Yet, windows are the weak link in a building when it comes to energy and temperature control. In winter, cold air leaks in. When it"s hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Producing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world. Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color. Electrochromic windows use electricity to change color. For example, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed, that is, when the amount of voltage is decreased, the window darkens until it"s completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark. One important feature that makes a smart window so smart is that it has a sort of "memory". All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future," Granqvist says, "our buildings may look different."

单选题The fuel tanks had a capacity of 140 liters.

单选题The horrible news really made us sad.A. attractiveB. terribleC. interestingD. serious

单选题Fruit and Vegetable Juices A European study has revealed that 100 percent fruit and vegetable juices are as effective as their whole fruit/vegetable counterparts in reducing risk factors related to certain diseases. The conclusion is the result of the study designed to question traditional thinking that 100 percent juices play a less significant role in reducing risk for both cancer and cardiovascular disease than whole fruits and vegetables. Juices are comparable in their ability to reduce risk compared to their whole fruit/vegetable counterparts, according to several researchers in the United Kingdom who conducted the literature review. The researchers analyzed a variety of studies that looked at risk reduction attributed to the effects of both fiber and antioxidants. As a result, they determined that the positive impact fruits and vegetables offer come not just from the fiber but also from antioxidants which are present in both juice and the whole fruits and vegetables. "When considering cancer and coronary heart diseases prevention, there is no evidence that pure fruit and vegetable juices are less beneficial than whole fruit and vegetables," the researchers said. The researchers added that the positioning of juices as being nutritionally inferior to whole fruits and vegetables in relationship to chronic disease development is "unjustified" and that policies, which suggest otherwise about fruit and vegetable juices, should be re-examined. The researchers who authored the paper suggest that more studies in certain area are needed to bolster their findings. "Although this independent review of the literature is not designed to focus on any particular 100 percent juice, it does go a long way in demonstrating that fruit and vegetable juices do play an important role in reducing the risk of various diseases, especially cancer and cardiovascular disease," said Sue Taylor. Her opinion is in agreement with the Juice Products Association, a non-profit organization not associated with this research. She added that appropriate amounts of juices should be included in the diet of both children and adults, following guidelines established by leading health authorities. Taylor also points to a large epidemiological study, published in the September 2006 issue of the Journal of Medicine, which found that consumption of a variety of 100 percent fruit and vegetable juices was associated with a reduced risk for Alzheimer"s disease. In fact, that study found that individuals who drank three or more servings of fruit and vegetable juices per week had a 76 percent lower risk of developing Alzheimer"s disease than those who drank juice less than once per week. The study was published in the Inter national Journal of Food Science and Nutrition (2006).

单选题The inconvenience to users and economic cost to the nation escalate rapidly.A. decreaseB. fallC. increaseD. decline

单选题Smoke particles and other air pollutants are often trapped in the atmosphere, thus forming smog.A. caughtB. burnedC. dirtiedD. covered

单选题This auditorium can seat 2,000 people.A. sitB. holdC. hideD. stock

单选题The government is debating the education laws.

单选题The manager {{U}}allocate{{/U}} duties to the clerks.

单选题The Social Insurance Number(SIN) card is the primary mode of identification for Canadians.

单选题Sleepless at Night It was a normal summer night. Humidity (湿气) hung in the thick air. I couldn't go to sleep, partly because of my cold and partly because of my expectations for the next day. My mum had said that tomorrow was going to be a surprise. Sweat stuck to my aching body. Finally, I gathered enough strength to sit up. I looked out of my small window into the night. There was a big bright moon hanging in the sky, giving off a magic light. I couldn't stand the pressure anymore, so I did what I always do to make myself feel better. I went to the bathroom and picked up my toothbrush and toothpaste. I cleaned my teeth as if there was no tomorrow. Back and forth, up and down. Then I walked downstairs to look for some signs of movement, some life. Gladiator, my cat frightened me as he meowed (喵喵地唱出) his sad song. He was on the old orange couch (长沙发), sitting up on his front legs, waiting for something to happen. He looked at me as if to show "I'm lonely, pet me. I need a good hug (紧抱) ." Even the couch begged me to sit on it. In one movement I settled down onto the soft couch. This couch represented my parents' marriage, my birth, and hundreds of other little events. As I held Gladiator, my heart started beating heavily. My mind was flooded with questions: What's life? Am I really alive? Are you listening to me? Every time I moved my hand down Gladiator's body, I had a new thought; each touch sang a different song. I forgot all about the heat and the next day's surprise. The atmosphere was so full of warmth and silence that I sank into its arms. Falling asleep with the big cat in my arms, I felt all my worries slowly move away.

单选题She's one of the smartest students in the whole school.A. most beautifulB. cleverestC. cunningD. hardest

单选题The road was covered with snow and ice. So I {{U}}slithered{{/U}} very often.

单选题Free Statins With Fast Food Could Neutralize Heart Risk Fast food outlets could provide statin drugs free of 1 so that customers can reduce the heart disease dangers of fatty food, researchers at Imperial College London (帝国理工大学) 2 in a new study. Statins reduce the 3 of unhealthy "LDL" cholesterol in the blood. A wealth of trial data has proven them to be highly effective at lowering a person"s heart attack 4 . In a paper published in the American Journal of Cardiology, Dr. Darrel Francis and colleagues calculate that the reduction in heart attack risk offered by a statin is 5 to offset the increase in heart attack risk from 6 a cheeseburger and drinking a milkshake. Dr. Francis, from the National Heart and Lung Institute at Imperial College London, who is the senior author of the study, said : "Statins don"t cut out all of the 7 effects of cheeseburgers and French fries. It"s better to avoid fatty 1hod altogether. But we"ve worked out that in terms of your 8 of having a heart attack, taking a statin can reduce your risk to more or less the same 9 as a fast food meal increases it." "It"s ironic that people are free to take as many unhealthy condiments in fast food outlets as they 10 , but statins, which are beneficial to heart health, have to be prescribed. It makes sense to make risk-reducing statins available just as easily as the unhealthy condiments that are 11 free of charge. It would cost less than five pence per 12 —not much different to a sachet of sugar." Dr. Francis said. When people are engaged in risky behaviors like driving or smoking, they"re encouraged to take 13 that lower their risk, like 14 a seatbelt or choosing cigarettes with filters. Taking a statin is a rational way of 15 some of the risks of eating a fatty meal.

单选题The Empire State Building was conceived on a grander scale than previous skyscrapers.A. executedB. designedC. financedD. applauded