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(西安建筑科技大学2008年考研试题)均匀流动中沿程水头损失与切应力成_________关系。
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(西南交通大学2003--2004学年第2学期期末考试试题B卷)圆管层流运动的动能修正系数α=( )。
Mr Mitsuyasu Ota, the Mayor of Hirate, in western Japan, made this week"s news columns after imposing a one-day-a-week ban on the use of computer equipment in the town"s municipal offices. The step was taken on the grounds that young staff "mistakenly think they are working" when sitting attentively at their computer screens. At the same time, Mr Ota lamented that "young people are not in the habit of writing by hand any more".One of the favourite arguments brought out by the opposition in technology wars is the notion that a technical short cut is simultaneously a kind of mental impoverishment, and that the man with the pen will think and write more effectively than the man with the Compaq.Leaving aside the question of whether advanced technology makes you think less dynamically, the idea that there should be recognisable stylistic discrepancies between the work of pen-pushers and key-tappers shouldn"t in the least surprise us. Historically, literary styles have always borne a strong relationship to the available technology. The quill pen, most obviously, allowed its owner only a certain number of words between refills, thereby encouraging all those lengthy Gibbonian sentences crammed with subordinate clauses. The fountain pen—which allowed you to write as many words as you wanted—and the manual typewriter created further revolutions. It is not particularly far-fetched, for example, to suggest that the elliptical prose of early-20th-century Modernist masters such as Hemingway derives in part from its having been typed, rather than written down.But what about the computer screen What effect does that have on the elemental patterns by which the writer downloads the words in his or her head Without wanting to sound like Mayor Ota, I suspect that to a certain kind of writer it is as much a hindrance as a help. A single glance at the average bookshop will demonstrate that novels are getting longer. There are excellent aesthetic reasons for that, of course, but there is also a technical explanation. Which is to say that computers allow you to write more words and to write them more quickly, without the restraint of having to alter everything by hand and then rewrite.Every so often, as a reviewer, one stumbles with a sinking heart across one of these enormous wordy affairs, which, however assiduous the attentions of its editor, betrays its origin as a screen-aided mental show-off. Perhaps, like the municipal employees of Mayor Ota"s Hirate, we should all try banning computers one day a week. The word "assiduous" in the last paragraph probably means ______
(西北工业大学2005--2006学年第1学期期末考试试题)水力损失可分为__________、__________。
The evolution of the social sciences has reached a crucial point that might be called a phase change in which old, atomistic, and impressionistic ways of doing research are superseded by a far more systematic and united methodology. To bring social science to the level of rigor already achieved by some of the physical sciences, a new type Of facility will be needed. This will be a transdisciplinary, Internet-based collaborative endeavour that will provide social and behavioral scientists with the databases, software and hardware tools, and other resources to conduct worldwide research that integrates experimental, survey, geographic, and economic methodologies on a much larger scale than was possible previously. This facility will enable advanced research and professional education in economics, sociology, psychology, political science, social geography, and related fields.In many branches of social science, a new emphasis on the rigor of formal laboratory experimentation has driven researchers to develop procedure and software to conduct online interaction experiment using computer terminals attached to local area networks. The opportunity to open these laboratories to the Internet will reduce the cost per research participant and increase greatly the number of institutions, researchers, students, and research participants who can take part. The scale of social science experimentation can increase by an order of magnitude or more, examining a much wider range of phenomena and ensuring great confidence in results through multiple replication of crucial studies.Technology for administering questionnaires to very large numbers of respondents over the Internet will revolutionize survey research. Data from past questionnaire surveys can be the springboard for new surveys with vastly larger numbers of respondents at lower cost than by traditional methods. Integrated research studies can combine modules using both questionnaire and experimental methods. Results can be linked via geographic analysis to other sources of data including census information, economic statistics, and data from other experiments and surveys. Longitudinal studies will conduct time-series comparisons across data sets to chart social and economic trends. Each new study will be designed so that the data automatically and instantly become part of the archives, and scientific publications will be linked to the data sets on which they are based so that the network becomes a universal knowledge system. The greatest advantage with the Internet-based collaborative endeavour may lie in ______
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