单选题In early 2004 eight tiny sensors were dropped from a plane near a military base in California. After hit ting the ground, the sensors—also known as smart dust sensors organized themselves into a network and quickly detected a fleet of military vehicles on the ground. They determined the direction, speed and size of a series of military vehicles traveling along the road and later transmitted the data to a computer at a nearby base camp. Smart dust sensors are minicomputers—as small as a grain of rice in some cases—that can monitor and evaluate their physical environment and can relay the information via wireless, communication. They can monitor elements such as temperature, moisture, humidity, pressure, energy use, vibration, light, motion, radiation, gas, and chemicals. These devices will soon have many applications, such as use in emergency rescue. Software has been developed to run these minicomputers. A key feature of the software is the ability of the sensors to automatically organize themselves into a communications network and talk to each other via wireless radio signals. If any one connection is interrupted, the sensors will self-correct and pass the information on to the next available sensor. Each sensor has a chip that does the computing work recording things like temperature and motion at its location. Each sensor also has a tiny radio transmitter that allows it to talk to other sensors within 100 feet or so. With a single network of 10,000 sensors—thought to be the biggest array (排列) of sensors currently possible, you could cover 9 square miles and get information about each point along the way. The data finally works its way to a base station that can send the information to a computer or to a wireless network. The scientists who are working with this technology say smart dust sensors can be used to detect the location or movement of enemy troops in areas too dangerous or remote for soldiers to operate. Scattering hundreds of self-networking sensors from a manned or unmanned plane onto the battlefield, in theory, could produce critical information and lead to strategic advantage. Sensors could also be used to detect the presence of chemical weapons and could give troops the time needed to put on protective gear.

单选题 There is no denying the fact that many young people finally get the jobs quite by accident, not knowing what lies in the way of opportunity for promotion, happiness and security. As a result, they are employed doing jobs that afford them little or no satisfaction. Our school leavers face so much competition that they seldom care what they do as long as they can earn a living. Some stay long at a job and learn to like it, others quite from one to another looking for something to suit them, the young graduates who leave the university look for jobs that offer a salary up to their expectation. Very few go out into the world knowing exactly what they want and realizing their own abilities. The reason behind all this confusion is that there never has been a proper vocational guidance in our educational institution. Nearly all grope in the dark and their chief concern when they look for a job is to ask what salary is like. They never bother to think whether they are suited for the job or even more important, whether the job suits them, Having a job is more than merely providing yourself and your dependants with daily bread and some money for leisure and entertainment, It sets a pattern of life and, in many ways, determines social status in life, selection of friends, leisure and interest. In choosing a career you should first consider the type of work which will suit your interest. Noting is more pathetic than taking on a job in which you have no interest, for it will not only discourage your desire to succeed in life but also ruin your talents and ultimately make you an emotional wreck and a bitter person.

单选题Burn rate is the speed at which a startup business consumes money. My rate would be $ 50,000 a month when my new media company started. So, I began looking around for individuals who would be my first investors. "Angel money" it was called. But when I reviewed my list of acquaintances to find those who might be able to help, I found the number got small. With no other choices, I began meeting with the venture-capital companies. But I was warned they took a huge share of your company for the money they put in. And if you struggled, they could drop you cold. As I was searching for "angel money", I started to build a team who trusted me even though I didn"t have money for paychecks yet. Bill Becker was an expert in computer programming and image processing at a very famous Media Lab at MIT. With his arrival, my company suddenly had a major technology "guy" in house. Katherine Henderson, a filmmaker and a former real-estate dealer, joined us as our director of market research. Steve White came on as operating officer. He had worked for the developer of a home-finance software, Quicken. We grabbed him. We had some really good people, but we still didn"t have enough money. One night, my neighbor, Louise Johnson, came for a visit. She and I were only nodding acquaintances, but her boys and ours were constant companions. She ran a very good business at the time. Louise was brilliant and missed nothing. She had been watching my progress closely. She knew I was dying for money and I had prospects but could offer no guarantees of success. She told me that her attorney had talked to mine and the terms had been agreed upon. She handed me an envelope. Inside was a check for $ 500,000. I almost fell down. I heard her voice as if from heaven. "I have confidence in your plan," she said. "You"ll do well. You"re going to work hard for it, but it"s satisfying when you build your own company. " Who would have thought I"d find an angel so close to home? There were no words sufficient for the moment. We just said good night. She left and I just stood there, completely humbled and completely committed. (385 words)

单选题To one' s boss, an employee should dress neatly, be______and show interest in the job. A. instant B. timely C. punctual D. quick

单选题Although punctual himself, Dr. Smith was quite used ______ late for the appointments. A. for patients' to be B. for patients' being C. to have patients' D. to patients' being

单选题Cindy: Thanks for all your help. Joe: No problem. Have a good day! Cindy: ______. Thanks again. Bye.

单选题Michael: Hi, mom. I'd like you to meet my girlfriend, Susan Lee. Susan, this is my mother.Susan: How do you do, Mrs. Miller.Mother: How do you do, Susan. I'm glad you can join us. ______.

单选题A: Hi, Daddy. Can I help you make the cake? B: ______ Hand me two eggs from the refrigerator. A. No, thanks anyway. B. Do you really want to help me? C. Yes, indeed. D. Maybe not now.

单选题(Some) methods (to prevent) soil erosion(侵蚀) ) (are) plowing parallel with the slopes of hills, (to plant) trees on unproductive land, and rotating crops.A. SomeB. to preventC. areD. to plant

单选题A good writer is ______ who can express the commonplace in an uncommon way. A. he B. one C. that D. what

单选题Operations which left patients______ and in need of long periods of recovery time now leave them feeling relaxed and comfortable.

单选题{{B}}Passage Five{{/B}} After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll could have been much worse. More than 60 people died in this earthquake. By comparison, an earthquake of similar intensity that shook America in 1988 claimed 25 000 victims. Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4: 31 a.m. on a holidays, when traffic was light on the city' s highways. In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city's buildings and highways, making them more resistant to quakes. Despite the good news, civil engineers aren't resting on their successes. Pinned(别住，钉住) to their drawing boards are blueprints (蓝图) for improved quake-resistant (抗震的) buildings. The new designs should offer even greater security to cities where earthquakes often take place. In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations. The most recent designs give buildings brains as well as concrete and steel supports. Called smart buildings, the structures respond like living organisms to an earthquake's vibration. When the ground shakes and the building tips forward, the computer would force the building to shift in the opposite direction. The new smart structures could be very expensive to build. However, they would save many lives and would be less likely to be damaged during earthquakes.

单选题A virus, often too small to be seen except with a powerful microscope, ______ diseases.

单选题(Not one) in one hundred children exposed to the disease (are) (likely) (to develop) symptoms of it.A. Not oneB. areC. likelyD. to develop

单选题Passage One Wow! Women now make up 57 per cent of university entrants, and they outnumber men in every subject — including maths and engineering. Speaking as an ardent feminist, I expect that this will have many wonderful results: a culture that is more feng shui and emotionally literate and altogether nicer, and an economy that benefits from unleashing the phenomenal energy and talents of British women who are — if GCSEs, A-levels and university entrance results mean anything -- currently giving the male sex a good old intellectual whipping. Obviously a corner of my heart worries about some aspects of the coming feminisation. Will we all become even more safety-conscious, regulation-prone and generally incapable of beating the Australians at anything than we already are? And even if the feminist revolution is good and unstoppable, we should perhaps consider some of the downsides — and the most interesting is that greater equality between the sexes is actually leading to greater division between the classes. Here's how. Since the emergence of our species, it has been a brutally sexist feature of romance that women on the whole — and I stress on the whole — will want to mate with men who are either on a par with themselves, or their superior, in socio-econ0mic and intellectual attainment. A recent study shows that if a man's IQ rises by 16 points, his chances of marrying increase by 35 per cent; if a woman's IQ rises by 16 points, her chances of getting hooked decline by the same amount. As a result of the same instinct — female desire to procreate with their intellectual equals — the huge increase in female university enrolments is leading to a rise in what the sociologists call assortative mating. The more middle-class graduates we create, the more they seem to settle down with other middle-class graduates, very largely because of the feminine romantic imperative already described. The result is that the expansion of university education has actually been accompanied by a decline in social mobility, and that is because these massive enrolments have been overwhelmingly middle-class. It is one of the sad failures of this Government that relatively few bright children from poor backgrounds have been encouraged to go to university, partly because of weaknesses in primary and secondary education, partly because of the withdrawal of the ladder of opportunity provided by academic selection. Once they have failed to go to university, the boom in the number of middle-class female students only intensifies their disadvantages. The result is that we have widening social divisions, and two particularly miserable groups: the female graduates who think men are all useless because they can't find a graduate husband, and the male non-graduates who feel increasingly domineered by the feminist revolution, and resentful of all these proud female graduates who won't give them the time of day. (474 words)

单选题In the 1950s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our housework. But as useful as computers are, they're nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior. Never mind something as complex as conversation: the most powerful computers struggle to reliably recognize the shape of an object, the most elementary of tasks for a ten-month-old kid. A growing group of AI researchers think they know where the field went wrong. The problem, the scientists say, is that AI has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step programs. A new movement in AI, on the other hand, takes a closer look at the more roundabout way in which nature came up with intelligence. Many of these researchers study evolution and natural adaptation instead of formal logic and conventional computer programs. Rather than digital computers and transistors, some want to work with brain cells and proteins. The results of these early efforts are as promising as they are peculiar, and the new nature-based AI movement is slowly but surely moving to the forefront of the field. Imitating the brain's neural (神经的) network is a huge step in the fight direction, says computer scientist and biophysicist Michael Conrad, but it still misses an important aspect of natural intelligence. "People tend to treat the brain as if it were made up of color-coded transistors," he explains. "But it's not simply a clever network of switches. There are lots of important things going on inside the brain cells themselves." Specifically, Conrad believes that many of the brain's capabilities stem from the pattern-recognition proficiency of the individual molecules that make up each brain cell. The best way to build an artificially intelligent device, he claims, would be to build it around the same sort of molecular skills. Right now, the notion that conventional computers and software are fundamentally incapable of matching the processes that take place in the brain remains controversial. But if it proves true, then the efforts of Conrad and his fellow AI rebels could turn out to be the only game in town.

单选题Guest: I've hooked a double room for 3 nights under Fowler.Receptionist: ______

单选题Tom was extremely angry, but cool-headed enough to ______ storming into the boss's office.

单选题______ of neglecting our education, my father sent my sister and me to an evening school. A. Accused B. Accusing C. To be accused D. That he was accused