单选题One student after another ______ up to answer the teacher"s questions.

单选题______a declining birth rate, there will be an over-supply of 35 000 primary school places by 2010, ______ leaving 35 schools idle. A. Coupled with, equals to B. Coupling with, equivalent to C. Coupled with, equivalent to D. Coupling with, equals to

单选题 Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man. They do not provide energy, {{U}}(21) {{/U}} do they construct or build any part of the body. They are needed for {{U}}(22) {{/U}} foods into energy and body maintenance. There are thirteen or more of them, and if {{U}}(23) {{/U}} is missing a deficiency disease becomes {{U}}(24) {{/U}} Vitamins are similar because they are {{U}}(25) {{/U}} of the same elements--usually carbon, hydrogen, oxygen, and {{U}}(26) {{/U}}. nitrogen. They are different {{U}}(27) {{/U}} their elements are arranged {{U}}(28) {{/U}}, and each vitamin {{U}}(29) {{/U}} one or more specific {{U}}(30) {{/U}} in the body. {{U}} (31) {{/U}} enough vitamins is essential to life, {{U}}(32) {{/U}} the body has no nutritional use for {{U}}(33) {{/U}} vitamins. Many people, {{U}}(34) {{/U}}, believe in being on the "safe side" and thus take extra vitamins. However, a {{U}}(35) {{/U}} diet will usually meet all the body's vitamin needs.

单选题The letter page of this newspaper is a ______ for public argument.

单选题Experimental sciences, based on the observation of the external world, cannot aspire to completeness; the nature of things, and the imperfection of our organs,______

单选题The story you read here can best be titled as ______.

单选题 Everybody loves a fat pay rise. Yet pleasure at your own can vanish if you learn that a colleague has been given a bigger one. Indeed, if he has a reputation for slacking, you might even be outraged. Such behaviors is regarded as "all too human", with the underlying assumption that other animals would not be capable of this finely developed sense of grievance. But a study by Sarah Bronson and Franks de Wail of Emory University in Atlanta, Georgia, which has just been published in Nature, suggests that it is all too monkey, as well. The researchers studied the behaviors of female brown capuchin monkeys. They look cute. They are good-natured, co-operative creatures, and they share their food readily. Above all, like their female human counterparts, they tend to pay much closer attention to the value of "goodsand services" than males. Such characteristics make them perfect candidates for Dr. Bronson’s and Dr. de Waal's study. The researchers spent two years teaching their monkeys to exchange tokens for food. Normally, the monkeys were happy enough to exchange pieces of rock for slices of cucumber. However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behaviour became markedly different. In the world of capuchins grapes are luxury goods (and much preferable to cucumbers). So when one monkey was handed a grape in exchange for her token, the second was reluctant to hand hers over for a mere piece of cucumber. And if one received a grape without having to provide her token in exchange at all, the other either tossed her own token at the researcher or out of the chamber, or refused to accept the slice of cucumber. Indeed, the mere presence of a grape in the other chamber ( without an actual monkey to eat it) was enough to induce resentment in a female capuchin. The researchers suggest that capuchin monkeys, tike humans, are guided by social emotions. In the wild, they are a co-operative, group-living species. Such co-operation is likely to be stable only when each animal feels it is not being cheated. Feelings of righteous indignation, it seems, are not the preserve of people alone. Refusing a lesser reward completely makes these feelings abundantly clear to other members of the group. However, whether such a sense of fairness evolved independently in capuchins and humans, or whether it stems from the common ancestor that the species had 35 million years ago, is, as yet, an unanswered question.

单选题European conservatives, until the end of the 19th century, rejected democratic principles and institutions. Instead they Uopted for/U monarchies or for authoritarian government.

单选题Eighty percent of mothers cradle their ______ in their left arms, holding them against the left side of their bodies.

单选题It______ on Fred that he would fail the course if he did not study harder.

单选题That wax dummy(假人)of a man is so ______ that people speak to it.

单选题We can infer from Paragraph 3 that ______.

单选题I decided to go to the cinema as soon as I ______.

单选题Each and every difference ______ contradiction.

单选题One hundred and thirteen million Americans have at least one bank-issued credit card. They give their owners automatic credit in stores, restaurants, and hotels, at home, across the country, and even abroad, and they make many banking services available as well. More and more of these credit cards can be read automatically, making it possible to withdraw or deposit money in scattered locations, whether or not the local branch bank is open. For many of us the "cashless society" is not on the horizon—it's already here. While computers offer these conveniences to consumers, they have many advantages for sellers too. Electronic cash registers can do much more than simply ring up sales. They can keep a wide range of records, including who sold what, when, and to whom. This information allows businessmen to keep track of their list of goods by showing which items are being sold and how fast they are moving. Decisions to reorder or return goods to suppliers can then be made. At the same time these computers record which hours are busiest and which employees are the most efficient, allowing personnel and staffing assignments to be made accordingly. And they also identify preferred customers for promotional campaigns. Computers are relied on by manufacturers for similar reasons. Computer-analyzed marketing reports can help to decide which products to emphasize now, which to develop for the future, and which to drop. Computers keep track of goods in stock, of raw materials on hand, and even of the production process itself. Numerous other commercial enterprises, from theaters to magazine publishers, from gas and electric utilities to milk processors , bring better and more efficient services to consumers through the use of computers.

单选题What we consider a luxury at one time frequently becomes a ______, many families find that ownership of two cars is indispensable.

单选题______through the attic and see if you can find anything for the jumble sale.

单选题 On September 7, 2001, a 68-year-old woman in Strasbourg, France, had her gall bladder (胆囊) removed by surgeons' operating, via computer from New York. It was the first complete telesurgery procedure performed by surgeons nearly 4, 000 miles away from their patient. In New York, Marescaux teamed up with surgeon Michel Gagner to perform the historic long-distance operation. A high-speed fiber-optic service provided by France Telecom made the connection between New York and Strasbourg. The two surgeons controlled the instruments using an advanced robotic surgical system, designed by Computer Motion Inc that enabled the procedure to be minimally invasive. The patient was released from the hospital after about 48 hours and regained normal activity the following week. The high-speed fiber-optic connection between New York and France made it possible to overcome a key obstacle to telesurgery time delay. It was crucial that a continuous time delay of less than 200 milliseconds be maintained throughout the operation, between the surgeon's movements in New York and the return video (from Strasbourg) on his screen. The delay problem includes video coding, decoding and signal transmission time. France Telecom's engineers achieved an average time delay of 150 milliseconds. "I felt as comfortable operating on my patient as if I had been in the room," says Marescaux. The successful collaboration (合作) among medicine, advanced technology, and telecomm unications is likely to have enormous implications for patient care and doctor training. Highly-skilled surgeons may soon regularly perform especially difficult operations through long-distance procedures. The computer systems used to control surgical movement can also lead to a breakthrough in teaching surgical techniques to a new generation of physicians. More surgeons-in-training will have the opportunity to observe their teachers in action in telesurgery operating rooms around the world. Marescaux describes the success of the remotely performed surgical procedure as the beginning of a "third revolution" in surgery within the last decade. The first was the arrival of minimally invasive surgery, enabling procedures to be performed with guidance by a camera, meaning that the abdomen (腹部) and thorax (胸腔) do not have to be opened. The second was the introduction of computer-assisted surgery, where complicated software algorithms (计算法) enhance the safety of the surgeon's movements during a procedure, making them more accurate, while introducing the concept of distance between the surgeon and the patient. It was thus natural to imagine that this distance--currently several meters in the operating room--could potentially be up to several thousand kilometers.