单选题A peculiarly pointed chin is his most memorable facial characteristic .

单选题The sun {{U}}encourages{{/U}} the growth of plants.

单选题The walls are made of (hollow) concrete blocks.

单选题The city was Uliterally/U destroyed.

单选题TV Goes Digital Coming soon to your TV: views of the hottest live basketball plays from any seat in the stadium. What a better look at that three-point shot? Call for a replay from behind the basket. Or better yet, follow the "view" of the ball as it goes through the net. While watching, you might use a built-in speakerphone to talk with a fan in the stands. Or send the score via e-mail to your father in Japan. Sounds impossible? It won't be when the computerized television industries combine to create digital TV-machines that receive, send, store, and manipulate TV programs the way computers now manipulate other data. Industry and government representatives recently reached an agreement on how this technology will take place. New digital TVs that allow current TVs to receive digital signals may hit stores by next spring. To understand how the digital revolution will change the way you watch TV it helps to know how TVs work now. Today, TV networks such as CBS and Fox broadcast TV shows as analogue electrical signals. These signals travel via the airwaves, satellites, or cable as a continuous stream of electromagnetic energy(like light and radio waves). But this system leaves a lot of room for error. The main problem is that interference can change the voltage of the signal as it travels. This may result in a distorted or miscolored picture. If we send out the signal in a form that is nearly free from interference-binary(两位数的)code, pictures and colors are not distorted. You'll need to buy a new TV to receive these signals. And the new sets may cost 1,000 US dollars more than today's TVs. But they'll come with other benefits that may make the price worthwhile. For one thing, the screens will be wider, like movie screens. In addition, the color will be richer. And you'll also get digital CD-quality sound. Besides these benefits, digital TVs can offer you a much wider choice of programs. Digital data can expand TV choices because computers can compress digital signals. Broadcasters will be able to send six times as much information on the same "channel".

单选题Better Control of TB Seen If a Faster Cure Is Found The World Health Organization estimates that about one-third of all people are infected with bacteria that cause tuberculosis . Most times, the infection remains inactive. But each year about eight million people develop active cases of TB, usually in their 1 . Two million people die 2 it. The disease has 3 with the spread of AIDS and drug-resistant forms of tuberculosis. Current treatments take at least six months. People have to 4 a combination of several antibiotic drugs daily. But many people stop 5 they feel better. Doing that can 6 to an infection that resists treatment. Public health experts agree that a faster-acting cure for tuberculosis would be more effective. Now a study estimates just how 7 it might be. A professor of international health at Harvard University led the study. Joshua Salomon says a shorter treatment program would likely mean not just more patients 8 It would also mean 9 infectious patients who can pass on their infection to others. The researchers developed a mathematical model to examine the effects of a two-month treatment plan. They 10 the model with current TB conditions in Southeast Asia. The scientists found that a two-month treatment could prevent about twenty percent of new cases. And it might 11 about twenty-five percent of TB deaths. The model shows that these 12 would take place between two thousand twelve and two thousand thirty. That is, if a faster cure is developed and in wide use by two thousand twelve. The World Health Organization 13 the DOTS program in nineteen ninety. DOTS is Directly Observed Treatment, Short-course. Health workers watch tuberculosis patients take their daily pills to make 14 they continue treatment. Earlier this year, an international partnership of organizations announced a plan to expand the DOTS program. The ten-year plan also aims to finance research 15 new TB drugs. The four most common drugs used now are more than forty years old. The Global Alliance for TB Drug Development says its long-term goal is a treatment that could work in as few as ten doses.

单选题The reporter was accused of unprofessional conduct .

单选题Young people all over the world are Ufascinated/U by science.

单选题Many of the normal - weight girls were trying to lose pounds

单选题Which of the following factors does NOT contribute to happiness?

单选题A physician "s sacred duty is to heal the sick.

单选题Our statistics show that we consume all that we are capable of producing.

单选题It is difficult to assess the importance of the decision.

单选题These aretheir motives for doing it.

单选题What do you think would be the {{U}}value{{/U}} of this ring, if I were to sell it?

单选题Pure feldspar is a colorless, transparent mineral, but impurities commonly make it opaque and colorful. A. truly B. rapidly C. periodically D. frequently

单选题 Obesity: the Scourge of the Western World Obesity is rapidly becoming a new scourge of the western world, delegates agreed at the 11th European Conference on the issue in Vienna Wednesday to Saturday. According to statements before the opening of the conference -- of 2,000 specialists from more than 50 countries -- 1.2 billion people worldwide are overweight, and 250 million are obese. Professor Bernhard Ludvik of Vienna General Hospital said, "Obesity is a chronic illness, fin Germany, 20 per cent of the people are already affected, but in Japan only one per cent." But he said that there was hope for sufferers thanks to the new scientific discoveries and medication. Professor Friedrich Hopichler of Salzberg said, "We are living in the new age (but) with the metabolism of a stone-age man." "I have just been to the United States. It is really terrible. A pizza shop is springing up on every corner. We have been overrun by fast food and Coca-Cola-ization. " Many of the experts stressed that obesity was a potential killer. Hopichler said, "Eighty percent of all diabetics are obese, also fifty per cent of all. patients with high blood pressure and fifty per cent with adipose tissue complaints." "Ten per cent more weight means thirteen per cent more risk of heart disease. Reducing one's weight by ten per cent leads to thirteen per cent lower blood pressure." Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs. "Though the health insurance pays for surgery (such as reducing the size of the stomach) when the body-mass index5 is more than 40. That is equivalent to a weight of 116 kilograms for a height of 1.70 meters. One should start earlier." Ludvik said that prevention should begin in school. "Child obesity ( fat deposits) correlates with the time which children spend in front of TV sets." The consequences were only apparent later on. No more than fifteen per cent of obese people lived to the average life expectancy for their population group.

单选题Obesity: the Scourge of the Western World Obesity is rapidly becoming a new scourge of the western world, delegates agreed at the 11th European Conference on the issue in Vienna Wednesday to Saturday. According to statements before the opening of the conference—of 2,000 specialists from more than 50 countries—1.2 billion people worldwide are overweight, and 250 million are obese. Professor Bernhard Ludvik of Vienna General Hospital said: "Obesity is a chronic illness. In Germany, 20 percent of the people are already affected, but in Japan only one percent." But he said that there was hope for sufferers thanks to the new scientific discoveries and medication. Professor Friedrich Hopichler of Salzberg said. "We are living in the new age (but) with the metabolism of a stone-age man." "I have just been to the United States. It is really terrible. A pizza shop is springing up on every corner. We have been overrun by fast food and Coca-Cola-ization." Many of the experts stressed that obesity was a potential killer. Hopichler said: "80 percent of all diabetics are obese, also 50 percent of all patients with high blood pressure and 50 percent with adipose tissue complaints." "10 percent more weight means 13 percent more risk of heart disease. Reducing one"s weight by 10 percent leads to 13 percent lower blood pressure." Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs. "Though the health insurance pays for surgery (such as reducing the size of the stomach) when the body-mass index is more than 40. That is equivalent to a weight of 116 kilograms for a height of 1.70 meters. One should start earlier." Ludvik said that prevention should begin in school. "Child obesity (fat deposits) correlates with the time which children spend in front of TV sets." The consequences were only apparent later on. No more than 15 percent of obese people lived to the average life expectancy for their population group.

单选题{{B}}第三篇{{/B}} {{B}} Relaxation{{/B}} During a state of deep relaxation, several physiological changes take place in the body: the body's oxygen consumption is reduced; the heart heat decreases; muscle tension and sweating ease, and there is decreased sympathetic(交感的) nervous system activity. This restful state not only allows the body to repair and restore itself, but it has a calming effect on the consciousness. How to achieve this state of relaxation, however, is a matter of opinion, and in some medical circles, a matter of controversy(争论). A recent report by Dr. David Holmes of the University of Kansas in the journal "American Psychologist" said that simply sitting in an armchair has just as many beneficial characteristics for the body as meditation(冥想) does. Researchers of other relaxation techniques disagree. These experts believe that more structured techniques, such as meditation, lead to a condition of deep relaxation. The debate goes on, but one thing appears to be clear that the relaxation response can be reached by a number of methods, and the methods themselves are not as important as getting there. One day, one method may work best; on another day, an alternative method may be more appropriate. Once you are aware of all the methods, you can find the one that works best for you. Some of the relaxation techniques are meditation, autoanalysis (自我心理分析) and progressive muscle relaxation. Although these techniques may not, in the end, produce more of a relaxation response than just sitting quietly in a chair, they have the added benefit of structure and discipline, and for these reasons appear to be more effective for most individuals.

单选题 The Ice Age Twenty thousand years ago, the earth was held in control by relentlessly (不宽容地) probing fingers of ice that drew power from frigid strongholds in the north and crept southwestward to bury forests, fields, and mountains. Landscapes that were violated by the slowly moving glaciers(冰川)would carry the scars of this advance far into the future. Temperatures dropped deeply, and land surfaces in many parts of the world were depressed by the unrelenting weight of the thrusting ice. At the same time, so much was drawn from the oceans to form these huge glaciers that sea levels around the world fell by three hundred and fifty feet, and large areas of the continental shelf became dry land. This period of the Earth's history had come to be called the Ice Age. In all, about eleven million square miles of land were covered with ice. The Ice Age terminated about fourteen thousand years ago when the ice sheets began to retreat. It took about seven thousand years for the ice to retreat to its present level.