单选题Distance education is enrollment and study with an educational institution that provides lesson materials prepared in a sequential and logical order for study by students on their own. When each lesson is completed, the student mails or transmits the assigned work to the institution for correction, grading, comment, and subject matter guidance by qualified instructors. Corrected assignments are returned promptly to the student. This exchange provides a personalized student-teacher relationship. If a student slows his or her pace or fails to send assignments, the school provides encouragement. Although some institutions provide employment placement information and assistance, no reputable school ever guarantees a job to graduates. Distance education and self-study are different. Self-study materials provide no instructional service. Corrected assignments, examinations, and special help provided by a qualified facility are vital to a good learning situation. However, these are not part of self-study. There are many self-study courses and recordings available, and they may have value, but they clearly are not correspondence or distance education courses. Some institutions offer combination courses that provide training-in-residence for students who complete their distance education lessons. In-service or on-the-job training is required or provided with other courses and is a feature of many vocational distance education programs. Quality distance education institutions screen prospective students to assure that only those who can benefit from the courses are enrolled. While there are educational prerequisites for some academic subjects, interest and aptitude are the primary factors leading to success in most distance education courses. Because they provide alternative educational opportunities, distance education institutions try not to deny a prospective student the opportunity to succeed in a course; interest and experience are good indicators of future Success. Distance education courses vary greatly in scope, level, and length. Some have few lessons and require only weeks to complete, while others have a hundred or more assignments requiring three or four years of conscientious study. Also, a wide variety of subjects is offered. Subjects include yacht design, accounting, medical transcription, nutrition, robotics, travel agent training, gun repair, gem identification, computer programming, catering and cooking, and earning an entire high school diploma, just to name a few. There is an increasing recognition of "distance education" and many colleges offer credit for their distance learning courses or accept some distance education credits of resident students working toward a degree. In fact, many distance education institutions award their own academic degrees. Acceptance of students and awarding of academic credit is the prerogative of the receiving academic institution. Also, the employing organization may set its own credit acceptance policies.

单选题The report was unusual in that it insinuated corruption on the part of the minister.

单选题We must learn to______ erroneous ideas through debate and reasoning.

单选题New and bizarre crimes have come into being with the advent of computer technology. Organized crime to has been directly involved; the new technology offers it unlimited opportunities, such as data crimes, theft of services, property-related crimes, industrial sabotage, politically related sabotage, vandalism, crimes against the individual and financially related crimes... Theft of data, or data crime, has attracted the interest of organized criminal syndicates. This is usually the theft or copying of valuable computer program. An international market already exists for computerized data, and specialized fences are said to be playing a key role in this rapidly expanding criminal market. Buyers for stolen programs may range from a firm's competitors to foreign nations. A competitor sabotages a company's computer system to destroy or cripple the firm's operational ability, thus neutralizing its competitive capability either in the private or the government sector. This computer sabotage may also be tied to an attempt by affluent investors to acquire the victim firm. With the growing reliance by firms on computers for their recordkeeping and daily operations, sabotage of their computers can result in internal havoc, after which the group interested in acquiring the firm can easily buy it at a substantially lower price. Criminal groups could also resort to sabotage if the company is a competitor of a business owned or controlled by organized crime. Politically motivated sabotage is on the increase; political extremist groups have sprouted on every continent. Sophisticated computer technology arms these groups with awesome powers and opens technologically advanced nations to their attack. Several attempts have already been made to destroy computer facility at an air force base. A university computer facility involved in national defence work suffered more than $ 2 million in damages as a result of a bombing. Computer vulnerability has been amply documented. One congressional study concluded that neither government nor private computer systems are adequately protected against sabotage. Organized criminal syndicates have shown their willingness to work with politically motivated groups. Investigators have uncovered evidence of cooperation between criminal groups and foreign governments in narcotics. Criminal groups have taken attempts in assassinating political leaders... Computers are used in hospital life-support system, in laboratories, and in major surgery. Criminals could easily turn these computers into tools of devastation. By sabotaging the computer of a life-support system, criminals could kill an individual as easily as they had used a gun. By manipulating a computer, they could guide awesome tools of terror against large urban centers. Cities and nations could become hostages. Homicide could take a now form. The computer may become the hit man of the twentieth century. The computer opens vast areas of crime to organized criminal groups, both national and international. It calls on them to pool their resources and increase their cooperative efforts, because many of these crimes are too complex for one group to handle, especially those requiting a vast network of fences. Although criminals have adapted to computer technology, law enforcement has not. Many still think in terms of traditional criminology.

单选题 Each year, millions of people in Bangladesh drink ground water that has been polluted by naturally high levels of arsenic poison. Finding safe drinking water in that country can be a problem. However, International Development Enterprises has a low-cost answer. This non-governmental organization has developed technology to harvest rainwater. People around the world have been harvesting rainwater for centuries. It is a safe, dependable source of drinking water. Unlike ground water, rainwater contains no minerals or salts and is free of chemical treatments. Best of all, it is free. The rainwater harvesting system created by International Development Enterprises uses pipes to collect water from the tops of buildings. The pipes stretch from the tops of buildings to a two-meter tall storage tank made of metal. At the top of the tank is a so-called "first-flush" device made of wire screen. This barrier prevents dirt and leaves in the water from falling inside the tank. A fitted cover sits over the "first-flush" device. It protects the water inside the tank from evaporating. The cover also prevents mosquito insects from laying eggs in the water. Inside the tank is a low coat plastic bag that collects the water. The bag sits inside another plastic bag similar to those used to hold grains. The two bags are supported inside the metal tank. All total, the water storage system can hold up to three-thousand-five-hundred liters of water. International Development Enterprises says the inner bags may need to be replaced every two to three years. However, if the bags are not damaged by sunlight, they could last even longer. International Development Enterprises says the water harvesting system should be built on a raised structure to prevent insects from eating into it at the bottom. The total cost to build this rainwater harvesting system is about forty dollars. However, International Development Enterprises expects the price to drop over time. The group says one tank can provide a family of five with enough rainwater to survive a five-month dry season.

单选题The child was so Uingenuous/U that even when she knocked the television off its stand so that it was irreparably damaged, her parents thought her to be charming.

单选题Which of the following is NOT mentioned as a factor shaping personality?

单选题There is a real possibility that we could finish the task ahead of schedule, ______ enough time.

单选题(While) smoking was associated with an attention of weight gain among black adults, (no such effect) occurred among white men or women, the latter (was) the group (most likely) to smoke for weight control.

单选题Some weeks ago, riding in a cab from Boston to Cambridge, my driver turned and asked me what I did for a living. "Teach English," I said. "Is that so?" The young man continued. "I was an English major." But then, instead of chatting idly about Joyce or dropping the subject altogether, this driver caught me short. "You guys," he said, turning back so that his furry face pressed into the glass partition, "ought to be shot." I think he meant it. The guilty party in this present state of affairs is not really the academic discipline. It is not the fault of English and philosophy and biology that engineering and accounting and computer science afford students better job opportunities and increased flexibility in career choice. Literature and an understanding of, say, man's evolutionary past are as important as ever. They simply are no longer perceived in today's market as salable. That is a harsh economic fact. And it is not only true in the United States. Employment prospects for liberal arts graduates in Canada, for example, are said to be the worst since the 1930s. What to do? I think it would be shortsighted for colleges and universities to advise students against majoring in certain subjects that do not appear linked (at least directly) to careers. Where our energies should be directed instead is toward the development of educational programs that combine course sequences in the liberal arts with course in the viable professions. Double majors--one for enrichment, one for earning one's bread--have never been promoted very seriously in our institutions of higher learning, mainly because liberal arts and professional-vocational faculties have long been suspicious or contemptuous of one another. Thus students have been directed to one path or the other, to the disadvantage of both students and faculty. A hopeful cue could be taken, it seems to me, from new attempts in the health profession (nursing and pharmacy, for example), where jobs are still plentiful, to give the humanities and social sciences a greater share of the curriculum. Why could not the traditional history major in the college of arts and sciences be pointed toward additional courses in the business school, or to engineering, or to physical therapy? This strategy requires a new commitment from both the institution and the student and demands a much harder look at the allocation of time and resources. But in an age of adversity, double majors are one way liberal arts students can more effectively prepare for the world outside.

单选题Inductive reasoning involves making useful generalization about the environment as a whole , based on a necessarily limited number of observations. As so , it is an important tool that people use to build the models of reality they need to function effectively. While conclusions can be wrong if observations are faulty or are drawn from an unrepresentative sample, if properly used, it can be incredibly powerful.

单选题His desire to ______ other people has caused trouble in his family.

单选题Dolphins' brains are particularly well-developed to ______.

单选题Questions 21—23 are based on a report about obesity. You now have 15 seconds to read Questions 21—23.

单选题Diamonds have little______value and their price depends almost entirely on their scarcity.(2011年四川大学考博试题)

单选题Scientists created ultra fine films of specialized crystals by means of ______.

单选题Yet it's easy to ______ on fat without changing your diet completely or giving up all your favorite foods.

单选题Different cultures are more prone to ______ certain illnesses because of the food that is characteristic in these cultures. A. contract B. conduct C. confine D. conquer