Riothamus, a fifth-century king of the Britons, was betrayed by an associate, fought bravely against the Goths but was defeated, and disappeared mysteriously. Riothamus’ activities, and only those of Riothamus, match almost exactly those attributed to King Arthur. Therefore, Riothamus must be the historical model for the legendary King Arthur. The argument above requires at least one additional premise. Which of the following could be such a required premise
A. Modern historians have documented the activities of Riothamus better than those of any other fifth-century king.
B. The stories told about King Arthur are not strictly fictitious but are based on a historical person and historical events.
C. Riothamus’ associates were the authors of the original legends about King Arthur.
D. Legends about the fifth century usually embellish and romanticize the actual conditions of the lives of fifth-century nobility.
E. Posterity usually remembers legends better than it remembers the actual historical events on which they are based.
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Editorial: Critics of nuclear power complain about the allegedly serious harm that might result from continued operation of existing nuclear power plants. But such concerns do not justify closing these plants; after all, their operation has caused no more harm than that caused by pollution generated by coal and oilburning power plants, the most important other sources of energy. Which of the following is an assumption on which the argument depends
A. Existing nuclear power plants should be closed only if it can be conclusively demonstrated that their continued operation is likely to cause harm more serious than the harm their operation has already caused.
B. Closing existing nuclear power plants would require greatly increased reliance on coal and oil-burning power plants.
C. The harm that has resulted from operation of existing coal and oil-burning power plants has been significant.
D. The harm that a nuclear power plant is likely to cause as it continues to operate can be reliably predicted from the past history of nuclear power plants.
E. The only harm that has resulted from operation of existing coal and oil-burning power plants has resulted from the pollution generated by these plants.
Excluding purchases by businesses, the average amount spent on a factory-new car has risen 30 percent in the last five years. In the average household budget, the proportion spent on car purchases has remained unchanged in that period. Therefore the average household budget must have increased by 30 percent over the last five years. Which of the following is an assumption on which the argument relies
A. The average number of factory-new cars purchased per household has remained unchanged over the last five years.
B. The average amount spent per car by businesses buying factory-new cars has risen 30 percent in the last five years.
C. The proportion of the average household budget spent on all car-related expenses has remained unchanged over the last five years.
D. The proportion of the average household budget spent on food and housing has remained unchanged over the last five years.
E. The total amount spent nationwide on factory-new cars has increased by 30 percent over the last five years.
外墙一般抹灰施工的顺序。应由檐口开始自上而下进行施工。按规范要求需要做泛水、滴水线、滴水槽的檐口、窗台、阳台、雨罩等部位时，要按设计要求做好。( )
A. 对
B. 错
Last year, support for the social and behavioral sciences represented only about three percent of the government’s total budget for research funds in the United States. Thus, the particularly sharp reductions imposed on such programs this year seem dictated not by financial constraints but by social philosophy. Which of the following is an assumption on which the conclusion of the passage above is based
A. The government funds allocated for research in the, social and behavioral sciences are not sufficient for the work that needs to be done.
B. The social and behavioral sciences are as valuable as the physical and biological sciences.
C. The current reductions will stop research in the social and behavioral sciences.
D. Government funding is the primary source of research money in the United States.
E. Three percent is an insignificant portion of the government’s total budget for research funds.
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