单选题There were ______.

单选题Precise calculations are ______.

单选题This is a very big hotel and it can______more than 1,000 people.

单选题The room was full of people and smoke. She started to feel______ with the heat inside.(2003年清华大学考博试题)

单选题They demand to set up an organization flexible enough to cope with any emergency.

单选题When a Scottish research team startled the world by revealing 3 months ago that it had cloned an adult sheep, President Clinton moved swiftly. Declaring that he was opposed to using this unusual animal husbandry technique to clone humans, he ordered that federal funds not be used for such an experiment—although no one had proposed to do so—and asked an independent panel of experts chaired by Princeton President Harold Shapiro to report back to the White House in 90 days with recommendations for a national policy on human cloning. That group—the National Bioethics Advisory Commission (NBAC)—has been working feverishly to put its wisdom on paper, and at a meeting on 17 May, members agreed on a near-final draft of their recommendations. NBAC will ask that Clinton"s 90-day ban on federal funds for human cloning be extended indefinitely, and possibly that it be made law. But NBAC members are planning to word the recommendation narrowly to avoid new restrictions on research that involves the cloning of human DNA or cells—routine in molecular biology. The panel has not yet reached agreement on a crucial question, however, whether to recommend legislation that would make it a crime for private funding to be used for human cloning. In a draft preface to the recommendations, discussed at the 17 May meeting, Shapiro suggested that the panel had found a broad consensus that it would be "morally unacceptable to attempt to create a human child by adult nuclear cloning." Shapiro explained during the meeting that the moral doubt stems mainly from fears about the risk to the health of the child. The panel then informally accepted several general conclusions, although some details have not been settled. NBAC plans to call for a continued ban on federal government funding for any attempt to clone body cell nuclei to create a child because current federal law already forbids the use of federal funds to create embryos (the earliest stage of human offspring before birth) for research or to knowingly endanger an embryo"s life, NBAC will remain silent on embryo research. NBAC members also indicated that they will appeal to privately funded researchers and clinics not to try to clone humans by body cell nuclear transfer. But they were divided on whether to go further by calling for a federal law that would impose a complete ban on human cloning. Shapiro and most members favored an appeal for such legislation, but in a phone interview, he said this issue was still "up in the air".

单选题Any earthquake that takes place in any area is certainly regarded as a kind of a ______ event. A. cholesterol B. charcoal C. catastrophic D. chronic

单选题He always did well at school ______ having to do part-time jobs every now and then.

单选题Hunger is no novelty. We can discount legends of golden ages, lands of Cockayne, and Megasthenes" statement that before Alexander"s invasion of India, there had never been famine or food shortage there. Trustworthy historical records show that during the Renaissance one year in ten in Britain, and one in five in Europe, was a famine year. China, with a greater area and more diverse climate, had a famine in some region every year. Famine is a state of affairs in which people are dying in the streets: It therefore attracts the notice of historians and is recorded. The fact that it strikes people who are aware of having been properly fed and well is more important. Not only are the survivors more adjustable, they are also angry at the breakdown of the system and eager to do something about it though it is obvious from the record that they do not always have the means. Malnutrition is much more underhanded. It is a chronic state in which the total food supply or, more often, the supply of certain components such as protein or some of the vitamins, is inadequate. It seems probable that, either constantly or seasonally, it used to be the usual condition of mankind and was regarded as normal. The unhealthy appearance of the figures in medieval paintings and drawings is often put down to the incompetence of the artist: it is as likely that most people really did look like that. The plentifulness with which poets greeted the merry month of May, in our dull climate, has had a climatic basis: it is just as likely that in May, after six months" shortage, there was now an adequate vitamin supply. The promptness with which some sailors died of scurvy (坏血病) after leaving port suggests that they were normally on the edge of scurvy and needed only a slight worsening of conditions to get it acutely. Others will think of other examples. Hunger and malnutrition are components of a classic example of a vicious circle. They lead to enfeeblement or unfeelingness in which nothing either can be done, or seems to be worth doing, to alter the state of affairs; this leads to more hunger and malnutrition. There is good reason to think that, in much of the developing world, if the circle could once be broken, it need never return.

单选题Joseph’s car has a flat tire. now is to walk to the nearest telephone.

单选题To facilitate entry into fine art thinking and avoid being misled in fundamental ways, archaeologists must understand the principles that define and govern each art category, whether utilitarian, fine or decorative. The traditional intent of a craft like ceramics is to serve a utilitarian function and its ability to act in this capacity is essentially dependent upon the skill of properly shaping a vessel to correspond to its task, so neither its exact manner of construction (by hand or wheel, coil or slab) nor the significance of imagery glazed on its surface changes its primary role "to contain", though it may add to its value. While ceramicists must think and construct art according to certain patterns of utilitarian form, following a prototypal model that relates to the artwork"s purpose, fine art has no such requirement. Fine artists often work in mixed or new media, evidenced by the example of vases created during the Greek Archaic period, which were an anomaly to the paradigm of earlier vases because the later ones not only served "to contain", but also to communicate ideas. An examination of this apparent inconsistency reveals both the Greek"s high regard for aesthetics and the explanation that fine artists usually created the paintings on the vases made by potters. Though Greek vase painting differs greatly from the work of modern artist Pablo Picasso, he too painted on ceramic objects made by others. Contrasting ancient fine art forms such as paintings and stone or metal sculptures with contemporary fine art forms such as computer art, video imagery, and holograms, it is possible to see that as the culture"s technology transforms, its changes are visible in the structural forms of fine art. At the same time, changes in fine art indicate its mandate to both reflect and create new perceptions of the culture, but form alone is insufficient to classify objects into art categories. Frequently, art that serves a decorative function is confused with both utilitarian and fine art because of its similar appearance, but the function of decorative art is the form itself, it is not compelled to fulfill either a utilitarian task or address concepts that exemplify its historic period. Communication would appear redundant if fine artists, like utilitarian and decorative artists, were to produce unlimited numbers of the same object. Once an idea is assimilated into the culture there is no longer a need to discuss it unless artists are more clearly defining or redefining it. Therefore, archaeologists should be aware that an artifact produced in any way by formula is not fine art. The fine artist"s process is continuous from the moment of conception until a piece is complete, and thus everything is though of in terms of context, so that, as a general guide, archaeologists should consider no mark within a work unimportant and only define its meaning in relation to the whole piece.

单选题The two psychologists had to modify the American Sign Language somewhat in order to accommodate the chimpanzees' spontaneous gestures.

单选题Recent studies have posed the question as to whether there is a link between film violence and real violence.

单选题It is very plain that such a life as this is far more ______ to health than that of the man who can afford little leisure for necessary rest in the course of the day. A. conductive B. constructive C. conciliate D. conducive

单选题The winter is already here and ______to be a most severe one.