单选题The police are doing all he can to bring those responsible for the bombing to ______. A. evidence B. hearing C. justice D. rule

单选题The word science is heard so often in modern times that almost everybody has some notion of its meaning. On the other hand, its definition is difficult for many people. The meaning of the term is confused, but everyone should understand its meaning and objectives. Just to make the explanation as simple as possible, suppose science is defined as classified knowledge (facts). Even in the true sciences distinguishing fact from fiction is not always easy. For this reason great care should be taken to distinguish between beliefs and truths. There is no danger as long as a clear difference is made between temporary and proved explanations. For example, hypotheses (假设) and theories are attempts to explain natural phenomena. From these positions the scientist continues to experiment and observe until they are proved or discredited (使不相信). The exact status of any explanation should be clearly labeled to avoid confusion. The objectives of science are primarily the discovery and the subsequent understanding of the unknown. Man cannot be satisfied with recognizing that secrets exist in nature or that questions are unanswerable, he must solve them. Toward that end specialists in the field of biology and related fields of interest are directing much of their time and energy. Actually, two basic approaches lead to the discovery of new information. One, aimed at satisfying curiosity, is referred to as pure science. The other is aimed at using knowledge for specific purposes, for instance, improving health, raising standards of living, or creating new consumer products. In this case knowledge is put to economic use. Such an approach is referred to as applied science. Sometimes practical-minded people miss the point of pure science in thinking only of its immediate application for economic rewards. Chemists responsible for many of the discoveries could hardly have anticipated that their findings would one day result in applications of such a practical nature as those directly related to life and death. The discovery of one bit of information opens the door to the discovery of another. Some discoveries seem so simple that one is amazed they were not made years ago, however one should remember that the construction of the microscope had to precede the discovery of the cell. The host of scientists dedicating their lives to pure science are not apologetic (抱歉) about ignoring the practical side of their discoveries, they know from experience that most knowledge is eventually applied.

单选题Congressional debate over the passage of this controversial bill is inevitable.

单选题No one hopes that he will ______ his usefulness.

单选题The writer's second marriage is different from the first one in all the following way except ______.

单选题These national parks are very important for preserving many animals, who would otherwise nm the risk of becoming______.

单选题The principle underlying all treatment of developmental difficulties in children ______.

单选题Fill in each of the following blanks with ONE Word to complete the meaning of the passage. The great chariot of society, which for so long had run down the gentle slope of tradition, now found itself powered by an internal combustion engine. Transactions and gain{{U}} 51 {{/U}}a new and startling{{U}} 52 {{/U}}force. What forces could have been{{U}} 53 {{/U}}powerful to smash a comfortable and{{U}} 54 {{/U}}world and institute in its place this new society? There was no single massive{{U}} 55 {{/U}}. It was not great events, single adventures, individual laws, or charming{{U}} 56 {{/U}}which{{U}} 57 {{/U}}about the economic revolution. It was a process of internal growth. First, there was the gradual emergence of national political{{U}} 58 {{/U}}in Europe. A second great current of change was to be found in the slow decay of the religious spirit under the{{U}} 59 {{/U}}of the skeptical, inquiring, humanist views of the Italian Renaissance. Still another{{U}} 60 {{/U}}current lies in the slow social changes that eventually rendered the market system possible. In the course of this change, power naturally began to gravitate into the hands of those who understood money matters--the merchants.

单选题Television is one of today's most powerful and widespread means of mass communication. It directly influences our lives on both a short and long-term basis; it brings worldwide situations into our homes; it affords extensive opportunities for acquiring higher education; and it performs these tasks in a convenient yet effective manner. We are all aware of the popularly accepted applications of television, particularly those relative to entertainment and news broadcasting. Television, however, has also been a vital link in unmanned deep space exploration (such as the Voyager I and Ⅱ missions), in providing visions from hazardous areas (such as proximity to radioactive materials or environments) in underwater research, in viewing storms moving across a metropolitan area (the camera being placed in a weather-protective enclosure near the top of a tower), etc. The earth's weather satellites also use television cameras for vie- wing cloud cover and movements from 20,000 miles in space. Infrared filters are used for night views, and several systems include a spinning mirror arrangement to permit wide-area views from the camera. Realizing the unlimited applications for today's television, one may thus logically ponder the true benefits of confining most of our video activities to the mass-entertainment field. Conventional television broadcasting within the United States centres around free enterprise and public ownership. This requires funding by commercial sponsors, and thus functions in a revenue-producing business manner. Television in USSR-subjected areas, conversely, is a government-owned and maintained arrangement. While such arrangements eliminate the need for commercial sponsorship, it also has the possibility of limiting the type of programs available to viewers (a number of purely entertainment programs similar to the classic "Bewitched", however, have been seen on these government -controlled networks. All isn't as gray and dismal as the uninformed might unnecessarily visualize). A highly modified form of television called Slow-Scan TV is presently being used by many Amateur Radio operators to provide direct visual communications with almost any area of the world. This unique visual mode recently allowed people on the tiny South Pacific country of Pitcairn Island to view, for the first time in their lives, distant areas and people of the world. The chief radio Amateur and communications officer of Pitcairn, incidentally, is the legendary Tom Christian-great, great grandson of Tom Christian of "Mutiny on the Bounty" fame. Radio Amateurs in many lands worked together for several months establishing visual capabilities. The results have proven spectacular, yet the visual capabilities have only been used for health education, or welfare purposes. Commercial TV is still unknown to natives of that tiny country. Numerous other forms of television and visual communication, have also been used on a semi-restricted basis. This indicates the many untapped areas of video and television which may soon be exploited on a more widespread basis. The old clich of a picture being worth a thousand words truly has merit.

单选题It is reported that the latest outbreak of the bird flu in Pennsylvania in the United States has prompted China to slap a ban on poultry imports from the sate.

单选题When we watch a play or a film, we all realize that the characters are sometimes ______.

单选题It is not enough to observe behaviors and ______ them with physiological events that occur at the same time.

单选题The plainer a bowerbird's plumage, the more brightly it decorates its nest to attract a mate.

单选题______ the way, we set off on foot into the dark night.

单选题What is happening is a survival-of-the-fittest struggle affecting ______ smaller factories in relatively low-tech, labor-intensive industries.

单选题The old musician decided to move to her country home______her advanced age and poor health. A. with regard to B. by virtue of C. on account of D. at the verge of

单选题War, chiefly the Civil War, in U. S. history has been a vital force in the rise of industrial capitalism, in the change of America from a dominantly agrarian and ______ country to one chiefly manufacturing in nature.

单选题{{B}}Passage 2{{/B}} Don't call him just a college professor. Internet entrepreneur, TV personality, advisor to presidents, and friend to the rich and powerful would be more accurate. Henry Louis "Skip" Gates Jr. is better known for his activities outside the academy. This week he sold Africana com, a website he created with a fellow Harvard University professor, to Time Warner. Terms of the deal weren't revealed, though the Wall Street Journal pegged the price at more than $10 million, with Gates reaping up to $1 million. Time Warner will incorporate the site, a portal with news and information about people of African descent, into America Online when the two merge as expected. The sense is that Gates got a very good deal. The site is a rich source of scholarship but hardly a rich source of revenue. As recently as the late 1980s Gates, who turns 50 this week, was an obscure professor, penning books on literary theory only a graduate student could love. Now he can't be avoided. He hosted a series about Africa on public television, writes occasional articles for the New Yorker, and even advises the Gore presidential campaign. He counts director Steven Spielberg, Microsoft's Bill Gates and President Clinton as friends. "They're not intimate friends," he insists. Indeed, Gates has evolved into a kind of expert on everything African-American. "He remains the go-to person on the state of African-American affairs," said Perry Steinberg, head of American Program Bureau, a lecture agency. The 30 or so speeches Gates delivers each year are another source of income for the professor. With fame comes controversy. Several other black intellectuals have taken him to task for not being confrontational enough. Gates has heard it before. '"Me? Critics? Oh, what a shock." But he considers himself more a descendent of historian and educator W. E.B. Du Bois than of Malcolm X. His ultimate goal is to build the field of Afro-American studies. "Fifty years from now I want there to be at least 10 great centers of Afro-American studies," he says. If working as a consultant on Spielberg's historical film Amistad or giving A1 Gore advice helps, so be it.