单选题While big corporations______global business news, small companies are charging into overseas markets at a faster pace.

单选题The writer does not believe that ______.

单选题Their experiments show that the ______ strain of wheat grows more quickly and is resistant to disease.

单选题The car, and the roads it travels on, will be revolutionized in the twenty first century. The key to tomorrow's "smart cars" will be sensors. "We'll see vehicles and roads that see and hear and feel and smell and talk and act," predicts Bill Spreitzer, technical director of General Motors Corporation's ITS program, which is designing the smart car and road of the future. Approximately 40, 000 people are killed each year in the United States in traffic accidents. Fully half of these fatalities come from drunk drivers, and many others from carelessness. A smart car could eliminate most of theses car accidents. It can sense if a driver is drunk via electronic sensors that can pick up alcohol vapor in the air, and refuse to start up the engine. The car could also alert the police and provide its precise location if it is stolen. Smart cars have already been built which can monitor one's driving and the driving conditions nearby. Small radars hidden in the bumpers can scan for nearby cars. Should you make a serious driving mistake, the computer would sound an immediate warning. At the MIT Medial Lab, a prototype is already being built which will determine how sleepy you are as you drive, which is especially important for long-distance truck drivers. The monotonous, almost hypnotic process of staring at the center divider for long hours is a grossly underestimated, life-threatening hazard. To eliminate this, a tiny camera hidden in the dashboard can be trained on a driver's face and eyes. If the driver's eyelids close for a certain length of time and his or her driving becomes erratic, a computer in the dashboard could alert the driver. Two of the most frustrating things about driving a car are getting lost, and getting stuck in traffic. While the computer revolution is unlikely to cure theses problems, it will have a positive impact. Sensors in your car tuned to radio signals from orbiting satellites can locate your car precisely at any moment and warn of traffic jams. We already have twenty-four Navstar satellites orbiting the earth, making up what is called the Global Positioning System. They make it possible to determine your location on the earth to within about a hundred feet. At any given time, there are several GPS satellites orbiting overhead at a distance of about 11,000 miles. Each satellite contains four "atomic clocks" , which vibrate at a precise frequency, according to the laws of the quantum theory. As a satellite passes overhead, it sends out a radio signal that can be detected by a receiver in a car's computer. The car's computer can then calculate how far the satellite is by measuring how long it took for the signal to arrive. Since the speed of light is well known, any delay in receiving the satellite's signal can be converted into a distance. In Japan there are already over a million cars with some type of navigational capability.(Some of them locate a car's position by correlating the rotations in the steering wheel to its position on a map) With the price of microchips dropping so drastically, future applications of GPS are virtually limitless, " The commercial industry is poised to explode," says Randy Hoffman of Magellan Systems Corp. which manufactures navigational systems. Blind individuals could use GPS sensors in walking sticks, airplanes could land by remote control, hikers will be able to locate their position in the woods— the list of potential uses is endless.

单选题The jet quickly______into the sky and soon went out of our view.

单选题Don't ______ stocks as they are not appropriate investments for people who will need access to their money in the near future.

单选题A new enthusiasm for eating emerged in Britain ______.

单选题A growing number of companies are now trying to serve "segments of one". They attempt to______their offer and communication to each individual customer. This is understandable with large industrial companies that have only a few major customers.

单选题We tend to think the men we like are good for everything, and ______we don't, good for nothing.

单选题On the north bank of the Ohio River sits Evansville, Ind. , home of David Williams, 52 , and of a riverboat casino where gambling games are played. During several years of gambling in that casino, Williams, a state auditor earning $35,000 a year, lost approximately $175,000. He had never gambled before the casino sent him a coupon for $ 20 worth of gambling. He visited the casino, lost the $20 and left. On his second visit he lost $800. The casino issued to him, as a good customer, a Fun Card, which when used in the casino earns points for meals and drinks, and enables the casino to track the user's gambling activities. For Williams, these activities become what he calls electronic morphine.【R1】______. In 1997 he lost $ 21, 000 to one slot machine in two days. In March 1997 he lost $ 72,186. He sometimes played two slot machines at a time, all night, until the boat locked at 5 a. m. , then went back aboard when the casino opened at 9 a. m. Now he is suing the casino, charging that it should have refused his patronage because it knew he was addicted. It did know he had a problem. In March 1998, a friend of Williams's got him involuntarily confined to a treatment center for addictions, and wrote to inform the casino of Williams's gambling problems. The casino included a photo of Williams among those of banned gamblers, and wrote to him a " cease admissions" letter. Noting the medical/psychological nature of problem gambling behaviors, the letter said that before being readmitted to the casino he would have to present medical/psychological information demonstrating that patronizing the casino would pose no threat to his safety or well-being.【R2】______. The Wall Street Journal reports that the casino has 20 signs warning: "Enjoy the fun... and always bet with your head, not over it. " Every entrance ticket lists a toll-free number for counseling from the Indiana Department of Mental Health. Nevertheless, Williams's suit charges that the casino, knowing he was "helplessly addicted to gambling," intentionally worked to "lure" him to "engage in conduct against his will. " Well.【R3】______. The fourth edition of the Diagnostic and Statistical Manual of Mental Disorders(DSM-IV)says "pathological gambling" involves persistent, recurring and uncontrollable pursuit less of money than of thrill of taking risks in quest of a windfall. 【R4】______. Pushed by science, or what claims to be science, society is reclassifying what once were considered character flaws or moral failings as personality disorders akin to physical disabilities.【R5】______. Forty-four states have lotteries, 29 have casinos, and most of these states are to varying degrees dependent on — you might say addicted to — revenues from wagering. And since the first Internet gambling site was created in 1995, competition for gamblers' dollars has become intense. The Oct. 28 issue of Newsweek reported that 2 million gamblers patronize 1, 800 virtual casinos every week. With $3. 5 billion being lost on Internet wagers this year, gambling has passed pornography as the Web's most profitable business.[A] Although no such evidence was presented, the casino's marketing department continued to pepper him with mailings. And he entered the casino and used his Fun Card without being detected.[B] It is unclear what luring was required, given his compulsive behavior. And in what sense was his will operative?[C] By the time he had lost $ 5, 000 he said to himself that if he could get back to even, he would quit. One night he won $ 5, 500, but he did not quit.[D] Gambling has been a common feature of American life forever, but for a long time it was broadly considered a sin, or a social disease. Now it is a social policy: the most important and aggressive promoter of gambling in America is government.[E] David Williams's suit should trouble this gambling nation. But don't bet on it.[F] It is worrisome that society is medicalizing more and more behavioral problems, often defining as addictions what earlier, sterner generations explained as weakness of will.[G] The anonymous, lonely, undistracted nature of online gambling is especially conductive to compulsive behavior. But even if the government knew how to move against Internet gambling, what would be its grounds for doing so?

单选题"The project goal is for students to build complex and interesting sentences, and ______ , whole paragraphs," The teacher explains. A. foremost B. ultimately C. readily D. intimately

单选题If it is true that morality cannot exist without religion, then does not the erosion of religion herald the ______ of morality?

单选题Going through a tricky divorce would be enough to put anyone off marriage for life. But a new study shows that men are much more likely to ______ a stressful and complicated break-up than women.

单选题 Standing on the rim of the Grand Canyon, gazing across this giant wound in the Earth's surface, a visitor might assume that the canyon had been caused by some ancient convulsion.In fact the events that produced the canyon, far from being sudden and cataclysmic, simply add up to the slow and orderly process of erosion. Many millions of years ago the Colorado Plateau in the Grand Canyon area contained 10, 000 more feet of rock than it does today and was relatively level. The additional material consisted of some 14-layered formations of rock. In the Grand Canyon region these layers were largely worn away over the course of millions of years. Approximately 65 million years ago the plateau's flat surface in the Grand Canyon area bulged upward from internal pressure; geologists refer to this bulging action as upwarping; it was followed by a general elevation of the whole Colorado Plateau, a process that is still going on. As the plateau gradually rose, shallow rivers that meandered across it began to run more swiftly and cut more definite courses. One of these rivers, located east of the upwarp, was the ancestor of the Colorado. Another river system called the Hualapai, flowing west of the upwarp, extended itself eastward by cutting back into the upwarp; it eventually connected with the ancient Colorado and captured its waters. The new river then began to carve out the 277- mile-long trench that eventually became the Grand Canyon. Geologists estimate that this initial cutting action began no earlier than 10 million years go. Since then, the canyon forming has been cumulative. To the corrosive force of the river itself have been added other factors. Heat and cold, rain and snow, along with the varying resistance of the rocks, increase the opportunities for erosion. The canyon walls crumble; the river acquires a cutting tool, tons of debris, rainfall running off the high plateau creates feeder streams that carve side canyons. Pushing slowly backward into the plateau, the side canyons expose new rocks, and the pattern of erosion continues.

单选题To call someone bird-brained in English means you think that person is silly or stupid. But will this description soon disappear from use in the light of recent research? It seems the English may have been unfair in associating bird's brains with stupidity. In an attempt to find out how different creatures see the world, psychologists at Brown University in the USA have been comparing the behaviour of birds and humans. One experiment has involved teaching pigeons to recognize letters of the English alphabet. The birds study in "classrooms", which are boxes equipped with a computer. After about four days of studying a particular letter, the pigeon has to pick out that letter from several displayed on the computer screen. Three male pigeons have learnt to distinguish all twenty-six letters of the alphabet in this way. A computer record of the birds' four-month study period has shown surprising similarities between the pigeons' and human performance. Pigeons and people find the same letters easy, or hard, to tell apart. For example, 92 per cent of the time the pigeons could tell the letter D from the letter Z. But when faced with U and V(often confused by English children), the pigeons were right only 34 per cent of the time. The results of the experiments so far have led psychologists to conclude that pigeons and humans observe things in similar ways. This suggests that there is something fundamental about the recognition process. If scientists could only discover just what this recognition process is, it could be very useful for computer designers. The disadvantage of a present computer is that it can only do what a human being has programmed it to do and the programmer must give the computer precise, logical instructions. Maybe in the future, though, computers will be able to think like human beings.

单选题The prevailing wind is the wind direction most often observed during a given time period. Wind speed is the rate at which the air moves past a Ustationary/U object.

单选题An ambulance must have priority as it usually has to deal with some kind of______.

单选题Ricardo has shown great ______ in his determination to understand the theory of relativity. A. adherence B. persistence C. intuition D. fantasy

单选题The oldest adult human skull yet found belongs to the lowest grade of Homo erectus, and to the Australoid line. It is known as Pithecanthropus (Ape-Man) Number 4, because it was the fourth of its kind to be found. All four were unearthed in river banks in central Java. Number 4 is about 700,000 years old, and Numbers 1,2, and 3 between 600,000 and 500,000. We know this because tektites--small, glassy nodules from outer space--were found in the same beds as the first three, and the beds containing Number 4 lay underneath the tektite bed, along with the bones of a more ancient group of animals. These tektites have been picked up in large numbers in Java, the Philippines, and Australia, where they all fell in a single celestial shower. Their age--approximately 600,000 years--has been accurately measured in several laboratories by nuclear chemical analysis, through the so-called argon-potassium method. Pithecanthropus Number 4 consists of the back part of a skull and its lower face, palate, and upper teeth. As reconstructed by Weidenreich, it is a brutal-looking skull, with heavy crests behind for powerful neck muscle attachments, a large palate, and large teeth, as in apes. The brain size of this skull was about 900 cubic centimeters; modern human brains range from about 1,000 to 2,000 cc with an average of about 1,450 cc. The brains of apes and Australopithecines are about 350 to 650 cc. So Pithecanthropus Number 4 was intermediate in brain size between apes and living men. His fragmentary skull was not the only find made in the beds it lay in. Nearby were found the cranial vault of a two-year-old baby, already different from those of living infants, and a piece of chinless adult lower jaw. Two other jaws have been discovered in the same deposits which were much larger than any in the world certainly belonged to a Homo erectus. They are called Meganthropus (Big Man) and may have belonged to a local kind of Australopithecine, but this is not certain, If so, Homo erectus coexisted with, or overlapped, the Anstralopithecines in Java as well as in South Africa, which implies that man did not originate in either place, but somewhere in between.