The subject of a dream can change if————————————一．

A . OLTPs B . transactions C . data sarts D . OLAPs

A . informative B . confusing C . distracting D . amusing

A . at high water B . when there is a following current C . at slack water D . at flood

A . bottom B . middle C . top D . none of the above

A．2-3-4-1-2-3 B．1-2-3-4-3-2 C．1-2-3-4-1-2 D．3-4-1-2-3-4

The journey to the moon has been the first step towards future explorations in space. The distance between the moon and the Earth is very short indeed when compared with the distances between Earth and the other planets. Mars, the nearest planet to Earth is of miles away ! Traveling to the planets or travels between planets will be man’ s next aim. Such travels will be more difficult than the trip to the moon and certainly more exciting. Recently, two American unmanned spacecraft, Vikings 1 and 2, landed on Mars in an attempt to discover whether that planet had any life on it. So far the presence of life on Mars has neither been proved nor ruled out. Russian space-probes have discovered that the surface of Venus is so hot that it is almost certain that there is no life there. Also the atmosphere of Venus is extremely, dense and the pressure is nearly a hundred times greater than the pressure of the Earth’s atmosphere. Scientists believe that in the future, space stations can be built in space. These stations can act as stop-over points in space. Spacecraft can refuel at these stations and get their supply of air, food and water. Spaceships of the future will be bigger and faster. They will be able to carry passengers for trips to the moon or planets. Man may in the future find planets which have the same conditions as those we have on Earth, and make them his home. However such a possibility is still in the distant future. At the same time, Man should realize that the Earth will be his only home for a long time and begin to value and care for it. Which of the following statements is true？ A．Recently, two American astronauts have landed on Mars. B．The surface of Mars is very hot. C．The journey to the moon started the future exploration in space. D．There is life in Venus.

A.What caused his death remains a mystery. B.Half of the candidates failed to pass. C.Seven plus five makes twelve. D.Two pedestrians as much as the truck driver are responsible for the accident.

No clear-cut distinction can be drawn between professionals and amateurs in science: exceptions can be found to any rule. Nevertheless, the word "amateur" does carry a connotation that the person concerned is not fully integrated into the scientific community and, in particular, may not fully share its values. The growth of specialisation in the nineteenth century, with its consequent requirement of a longer, more complex training, implied greater problems for amateur participation in science. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United Kingdom. A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper. Thus, in the nineteenth century, local geological studies represented worthwhile research in their own right; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate and reflect on the wider geo logical picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the wide spread introduction of refereeing, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way. Although the process of professionalisation and specialisation was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however, the nineteenth century must be reckoned as the crucial period for this change in the structure of science. The growth speeialisation in the 19th century might be more clearly seen in sciences such as ______. A．sociology and chemistry B．physics and psychology C．sociology and psychology D．physics and chemistry

A．large B．total C．small D．Big

No man ever looks at the world with pristine(未受外界影响的) eyes. He sees it edited by a definite set of customs and institutions and ways of thinking. Even in his philosophical probings he cannot go behind these stereotypes(固定的模式); his very concepts of the true and the false will still have reference to his particular traditional customs. John Dewey has said in all seriousness that the part played by custom in shaping the behavior. of the individual as over against any way in which he can affect traditional custom, is as the proportion of the total vocabulary of his mother tongue over against those words of his own baby talk that are taken up into the language of his family. When one seriously studies social orders that have had the opportunity to develop independently, the figure(这种比喻) becomes no more than an exact and matter-of- fact observation. The life history of the individual is first and foremost an adjustment to the patterns and standards traditionally handed down in his community. From the moment of his birth the customs into which he is born shape his experience and behavior. By the time he can talk, he is the little creature of his culture, and by the time he is grown and able to take part in its activities, its habits are his habits, its beliefs his beliefs, its impossibilities his impossibilities. The author thinks the reason why custom has been ignored in the academic world is that______. A．custom reveals only the superficial nature of human behavior B．the study of social orders can replace the study of custom C．people are still not aware of the important role that custom plays in forming our world outlook D．custom has little to do with our ways of thinking