单选题Why was Kohoutek referred to as" the comet of the century"?

单选题 Questions 11--13 are based on the following passage. You now have 15 seconds to read Questions 11--13.

单选题Learning disabilities are very common. They (21) perhaps 10 percent of all children. Scientists now know there are many different kinds of learning disabilities and that they are (22) by many different things. There is no longer any (23) that all learning disabilities (24) differences in the way the brain is organized. Since there is no (25) sign of the disorder, some researchers began looking at the brain itself to learn what might be wrong. In one study, researchers (26) the brain of a learning-disabled person. They found two unusual things. One (27) cells in the left side of the brain, which control language. These cells (28) are white, in the learning disabled person, (29) , these cells were gray. The researchers also found that many of the nerve cells were not in a line the (30) they should have been. The nerve cells were mixed together. The study was carded out (31) the guidance of Norman Geschwind, an expert on learning disabilities. Doctor Geschwind (32) that learning disabilities resulted mainly from problems in the left side of the brain, and this part of brain failed to develop normally. Probably, he said, nerve cells there did not connect (33) they should. So the brain was like an electrical device in which the wires were (34) . Other researchers did not examine brain (35) Instead, they measured the brain's electrical activity and made a map of the electrical (36) . Frank Duffy experimented with this (37) and found large differences in the brain activity of normal children and those with reading problems. The differences appeared (38) the brain. Doctor Duffy said his research is (39) that reading disabilities involve (40) to a wide area of the brain, not just the left side.

单选题______receives more visitors every year.

单选题______is Australia's second largest city, the cultural and sports center of the country. [A] Sydney [B] Canberra [C] Melbourne [D] Brisbane

单选题Questions 17—20 are based on the following discussion with Dr. Jane Richard about premarital contracting. You now have 20 seconds to read Questions 17—20.

单选题The author points out the rise of mass media of communication is a complex factor, because

单选题 By the 1820's in the United States, when steamboats were common on western waters, these boats were mostly powered by engines built in the West (Pittsburgh, Cincinnati, or Louisville), and of a distinctive western design specially suited to western needs. The first steam engines{{U}} (21) {{/U}}practical use in England and the United States were{{U}} (22) {{/U}}low-pressure design. This was the type first{{U}} (23) {{/U}}by James Watt, then manufactured by the firm of Boulton and Watt. Steam was{{U}} (24) {{/U}}in a large, double-acting vertical cylinder, but the steam reached only a few pounds of pressure per square inch. It was low-pressure engines of this type that{{U}} (25) {{/U}}first introduced into the United States by Robert Fulton. He{{U}} (26) {{/U}}such a Boulton and Watt engine from England to run the Clermont. But this type of engine was ,expensive and complicated,{{U}} (27) {{/U}}many precision-fitted moving parts. The engine that became standard on western steamboats was of a different and{{U}} (28) {{/U}}design. It was the work primarily of an unsung hero of American industrial progress, Oliver Evans (1755-1819), the{{U}} (29) {{/U}}son of a Delaware farmer. Evans early became{{U}} (30) {{/U}}by the possibilities of mechanized production and steam power. As early as 1802 he{{U}} (31) {{/U}}a stationary steam engine of high-pressure design in his mill. Engines of this type were not{{U}} (32) {{/U}}, but before Evans they were generally considered{{U}} (33) {{/U}}and dangerous. Within a decade the high-pressure engine, the new type, had become standard on western waters. Critics{{U}} (34) {{/U}}of western conditions often attacked it as wasteful and dangerous. But people who really knew the Ohio, the Missouri, and the Mississippi{{U}} (35) {{/U}}, with good reasons, that it was the only engine for them. In{{U}} (36) {{/U}}western rivers the weight of vessel and engine{{U}} (37) {{/U}}important; a heavy engine added to the problem of navigation. The high-pressure engine was{{U}} (38) {{/U}}lighter in proportion to horsepower, and, with less than half as many moving parts, was much easier and cheaper to repair. The main advantages of low-pressure engines were safe operation and {{U}}(39) {{/U}}of fuel consumption,{{U}} (40) {{/U}}of which meant much in the West..

单选题 Questions 17～20 are based on a conversation about hunting un apartment. You now have 20 seconds to read Questions 17～20.

单选题We are often cheated by some words because ______.

单选题{{B}}Passage 1{{/B}} Lacking a cure for AIDS, society must offer education, not only by public pronouncement but in classrooms. Those with AIDS or those at high risk of AIDS suffer prejudice; they are feared by some people who find living itself unsafe, while others conduct themselves with a "bravado" that could be fatal. AIDS has {{U}}afflicted{{/U}} a society already short on humanism, open-handedness and optimism. Attempts to strike it out with the offending microbe are not abetted by pre-existing social ills. Such concerns impelled me to offer the first university level undergraduate AIDS course, with its two important aims. To address the fact the AIDS is caused by a virus, not by moral failure of societal collapse. The proper response to AIDS is compassion coupled with an understanding of the disease itself. We wanted to foster (help the growth of) the idea of a humane society. To describe how {{U}}AIDS tests institutions upon which our society rests{{/U}}. The economy, the political sys- tem, science, the legal establishment, the media and our moral ethical-philosophical attitudes must respond to the disease. Those responses, whispered, or shrieked, easily accepted or highly controversial, must be put in order if the nation is to manage AIDS. Scholars have suggested that how a society deals with the threat of AIDS describes the extent to which that society has the right to call itself civilized. AIDS, then, is woven into the tapestry of modem society; in the course of explaining that tapestry, a teacher realizes that AIDS may bring about changes of historic proportions. Democracy obliges its educational system to prepare students to become informed citizens, to join their voices to the public debate inspired by AIDS. Who shall direct just what resources of manpower and money to the problem of AIDS? Even more basic, who shall formulate a national policy on AIDS? The educational challenge, then, is to enlighten the individual and the societal, or public responses to AIDS.

单选题The phrase" seeding the center' eye'" means

单选题According to :the text, which is the right description about people with I. Q. 's below 90?

单选题What does "greater discomfort accrues to us" in Paragraph 1 mean here?

单选题 Often referred to as "the heart of a factoring organization", the credit department is responsible for granting credit to clients' customers and for collecting the accounts receivable purchased by the factor. When factored clients submit customer orders for credit approval, the credit department analyzes the financial condition and credit worthiness of the customer, and then makes a decision to approve or decline the order. The department must then monitor the condition of approved customers and collect all due receivables. Careful credit checking and effective collection procedures in this department can greatly reduce the risks inherent in factoring. As the head of the credit department, the credit manager is responsible for seeing that the department operates effectively. He must develop the factor's credit policies in consultation with senior factoring associates, and he is in overall command of everything from credit and collections to bankruptcy and liquidations. If the factor is a commercial bank division, the credit manager is a bank's vice president, and credit policy must also be approved by top management of the bank. Assisting the credit manager may be several supervisors who have credit responsibilities of their own and who also oversee the analysis and approval of customer orders by the credit specialists. Credit supervisors typically spend about eighty percent of their time handling large customer orders. If a customer order exceeds a supervisor's credit authority, he is responsible for making recommendations to the credit manager. A supervisor also reviews a subordinate's credit decision if the subordinate is unsure of the extent of the credit risk or if a client questions a particular credit decision. In extremely large credit exposures, supervisors bear the responsibility for analyzing the credit position of the customers and deciding on credit limits. To do this, they must regularly obtain current data from various credit information sources. They must also have extensive contact with each customer to determine operational performance and progress. Frequently, supervisors are called upon to give advice on what should be done to improve a company's financial condition. Meeting all these responsibilities requires that each supervisor continuously observe and study the industries with which he is concerned, so that he is capable of anticipating market changes which may affect his accounts. A supervisor's major challenge is to maintain a fine balance between the demands of clients that all their customer orders be approved and the questionable financial position of some of the customers. In reviewing any credit decision, a supervisor must be capable of weighing a variety of elements, including the possibility of losing the client, the customer's credit position, and the extent of any possible loss.

单选题Every business has trouble sooner or later, and it is the chief executive officer's responsibility to set things right. Good executives (21) themselves in touch with their companies — they know what is going on at every level. Yes, they delegate, (22) they also follow up to make certain (23) each delegated task has been completed. No major (24) should be made in a company (25) the president's knowledge. Even though the president or CEO is (26) responsible for the failure or success of his company, a smart CEO (27) himself with competent workers at all levels, especially (28) the administrative level. He then consults with his executives and supervisors (29) he has to make an important decision. He (30) their input and creates an open atmosphere where all may feel comfortable to share (31) ideas. By (32) this practice, a president knows that when a decision has been made, his administrators will feel (33) they have had a part in it, or at least they will understand (34) the decision was made. He can then (35) them to support the decision at their level. (36) is considered poor practice for an administrator to (37) about an executive decision after it has been discussed openly and decided upon in committee. The time to (38) disagreement is during committee discussion or with the president privately. Publicly, an administrator is expected to support the president (39) the company has become involved in an illegal activity. Americans consider this public support (40) form of professional behavior.

单选题The passage primarily concerns which of the following?