单选题The course gives you basic instruction in car maintenance.

单选题阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}Smoking{{/B}} Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy. Cigarette smoking is believed by most research workers, in this field to be an important factor in the development of cancer of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from heart disease than non-smoking males. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply. Apart from statistics, it might be helpful to look at what smoking tobacco does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is powerful poison, and black tar. As smoke is breathed in, all those components form deposits on the membranes of the lungs. One point of concentration is where the air tube and bronchus divides. Most lung cancer begins at this point. Filters and low tar tobacco are claimed to make smoking to some extent safer, but they can only slighfiy reduce, not eliminate the hazards.

单选题He talks tough but has a tender heart. A．heavy B．mild C．kind D．wild

单选题The" smart grid" is a catchall phrase for the power grid of the future, with various test projects underway in Colorado, Massachusetts, New York, Illinois, and Hawaii. The idea is to make a system that will stop power surges from causing blackouts: It would create more energy, efficient power lines to carry electricity longer distances without losing voltage (current grids lose about 8 percent of power over distance). It would incorporate wind and solar energy into existing power grids. And it would let customers monitor the electricity they use in their homes, paying less for power consumed in off-hours. All the following words can be used to describe the "smart grid", EXCEPTA. more efficient.B. greener.C. consumer-friendly.D. cheaper.

单选题What is Turner likely to study next?

单选题The Pullman Strike of 1894 tied up transportation and was finally ended only by government intervention.

单选题 Losing Weight Girls as young as 10 years old are dieting and in danger of developing unhealthy attitudes about weight, body image and food, a group of Toronto researchers reported Tuesday. Their study of 2,279 girls aged 10 to 14 showed that while the vast majority had healthy weights, nearly a third felt they were overweight and were trying to lose pounds. Even at the tender age of 10, nearly 32 percent of girls felt "too fat" and 31 percent said they were trying to diet. McVey, a researcher at the Hospital for Sick Children in Toronto, and her colleagues analyzed the data collected in a number of surveys of southern Ontario school girls between 1993 and 2003, reporting their findings in Tuesday's issue of the Canadian Medical Association Journal. Nearly 80 percent of the girls had a healthy body weight and only 7.2 percent were considered overweight using standard weight-to-height ratios. Most researchers suggest the rate of overweight children in this country is several times higher than that figure. Nearly 30 percent of the girls reported they were currently trying to lose weight, though few admitted to dangerous behavior such as self-induced vomiting. Still, a test that measured attitudes towards eating showed 10.5 percent of survey participants were already at risk of developing an eating disorder. "We're not talking about kids who've been prescribed a diet because they're above average weight or overweight. We're talking about children who are within a healthy weight range. And they have taken it upon themselves to diet to lose weight," McVey said, acknowledging she found the rates disturbing. She said striking a balance between healthy weights and healthy attitudes towards food and body image is a complex task, with no easy solutions.

单选题The government is {{U}}debating{{/U}} the education laws. A. discussing B. defeating C. delaying D. declining

单选题 The Iceman On a September, day in 1991, two Germans were climbing the mountain between Austria and Italy. High up on a mountain pass, they found the body of a man lying on the ice. At that height (10,499 feet, or 3,200 meters), the ice is usually permanent, but 1991 had been an especially warm year. The mountain ice had melted more than usual and so the body had come to the surface. It was lying face downward. The skeleton (骨架) was in perfect condition except a wound on the head. There are still on the bones and remains of some clothes. The hands were still holding the wooden handle of an ax and on the feet there were very simple leather and cloth boots. Nearby was a pair of gloves made of tree bark (树皮) and a holder for arrows. Who was the man? How and when had he died? Everybody had a different answer to these questions. Some people thought that it was from this century, perhaps the body of a soldier who died in World War I, since several soldiers had already been found in this area. A Swiss woman who believed it might be her father, who had died in those mountains twenty years before and whose body had never been found. The scientists who rushed to look at the body thought it was probably much older, maybe even a thousand years old. With modern dating techniques, the scientists soon learned that the iceman was about 5,300 years old. Born in about 3300 B.C., he lived during the Bronze Age in Europe. At first scientists thought he was probably a hunter who had died from an accident in the high mountains. More recent evidence, however, tells a different story. A new kind of X-ray shows an arrowhead still stuck in his shoulder. It left only a tiny hole in his skin, but it caused internal damage and bleeding. He almost certainly died from this wound, and not from the wound oil the back of his head. This means that he was probably in some kind of battle. It may have been part of a large war, or he may have been fightiing bandits. He may even have been a bandit himself. By studying his clothes and tools, scientists have already learned a great deal from the Iceman about the times he lived in. we may never know the full story of how he died, but he has given us important clues to the history of those distant times.

单选题Come out, or I'll {{U}}bust{{/U}} the door down. A. shut B. set C. break D. beat

单选题Their marketing Upolicy/U for the product involves obtaining as much free publicity as possible.

单选题From my standpoint , you know, this thing is just funny.

单选题Sue was distraught waiting for her mother to {{U}}come to{{/U}} last night.

单选题I recommend you buy a computer. A. force B. advise C. ask D. require

单选题Losing Weight Girls as young as 10 years old are dieting and in danger of developing unhealthy attitudes about weight, body image and food, a group of Toronto researchers reported Tuesday. Their study of 2,279 girls aged 10 to 14 showed that while the vast majority had healthy weights, nearly a third felt they were overweight and were trying to lose pounds. Even at the tender age of 10, nearly 32 per cent of girls felt "too fat" and 31 per cent said they were trying to diet. McVey, a researcher at the Hospital for Sick Children in Toronto, and her colleagues analyzed data collected in a number of surveys of southern Ontario school girls between 1993 and 2003, reporting their findings in Tuesday"s issue of the Canadian Medical Association Journal. Nearly 80 percent of the girls had a healthy body weight and only 7.2 per cent were considered overweight using standard weight-to-height ratios. Most researchers suggest the rate of overweight children in this country is several times higher than that figure. Nearly 30 percent of the girls reported they were currently trying to lose weight, though few admitted to dangerous behavior such as self-induced vomiting. Still, a test that measured attitudes towards eating showed 10.5 per cent of survey participants were already at risk of developing an eating disorder. "We"re not talking about kids who"ve been prescribed a diet because they"re above average weight or overweight. We"re talking about children who are within a healthy weight range. And they have taken it upon themselves to diet to lose weight," McVey said, acknowledging she found the rates disturbing. She said striking a balance between healthy weights and healthy attitudes towards food and body image is a complex task, with no easy solutions.

单选题His claims seem credible to many people.

单选题The sports meet was postponed owing to the heavy rain.

单选题Living with Computer After too long on the Net, even a phone call can be a shock. My boyfriend's Liverpudlian accent suddenly becomes hard to understand after the clarity of his words on screen; a secretary's tone seems more rejecting than I'd imagined it would be. Time itself becomes fluid—hours become minutes, and alternately seconds stretch into days. Weekends, once a highlight of my week, are now just two ordinary days. For the last three years, since I stopped working as a producer for Charlie Rose, I have done much of my work as a tele-commuter (远程交谈者). I submit articles and edit them via E-mail and communicate with colleagues on Internet mailing lists. My boyfriend lives in England, so much of our relationship is computer-mediated. If I desired, I could stay inside for weeks without wanting anything. I can order food, and manage my money, love and work. In fact, at times I have spent as long as three weeks alone at home, going out only to get mail and buy newspapers and groceries. I watched most of the blizzard (风) of '96 on TV. But after a while, life itself begins to feel unreal. I start to feel as though I've merged with my machines, taking data in, spitting them back out, just another node (节点) on the Net. Others on line report the same symptoms. We start to strongly dislike the outside forms of socializing. It's like attending an A.A. meeting in a bar with everyone holding a half-sipped drink. We have become the Net opponents' worst nightmare. What first seemed like a luxury, crawling from bed to computer, not worrying about hair, and clothes and face, has become an avoidance, a lack of discipline. And once you start replacing real human contact with cyber-interaction (网上交流), coming back out of the cave can be quite difficult. At times, I turn on the television and just leave it to chatter in the background, something that I'd never done previously. The voices of the programs soothe (安危) me, but then I'm jarred (使感不快) by the commercials. I find myself sucked in by soap operas, or compulsively (强制性地) needing to keep up with the latest news and the weather. "Dateline," "Frontline," "Nightline," CNN, every possible angle of every story over and over and over, even when they are of no possible use to me. Work moves from foreground to background.

单选题Which of the following is NOT true of Britain?

单选题At what temperature does the superconducting ceramic lose its resistance?