首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   11441篇
  免费   324篇
各国政治   688篇
工人农民   367篇
世界政治   1085篇
外交国际关系   576篇
法律   5948篇
中国政治   81篇
政治理论   2931篇
综合类   89篇
  2021年   60篇
  2020年   142篇
  2019年   206篇
  2018年   262篇
  2017年   263篇
  2016年   279篇
  2015年   182篇
  2014年   265篇
  2013年   1517篇
  2012年   286篇
  2011年   319篇
  2010年   262篇
  2009年   273篇
  2008年   347篇
  2007年   402篇
  2006年   326篇
  2005年   303篇
  2004年   341篇
  2003年   308篇
  2002年   281篇
  2001年   411篇
  2000年   389篇
  1999年   284篇
  1998年   204篇
  1997年   174篇
  1996年   157篇
  1995年   133篇
  1994年   118篇
  1993年   124篇
  1992年   193篇
  1991年   227篇
  1990年   208篇
  1989年   193篇
  1988年   188篇
  1987年   211篇
  1986年   183篇
  1985年   143篇
  1984年   164篇
  1983年   152篇
  1982年   123篇
  1981年   122篇
  1980年   81篇
  1979年   116篇
  1978年   86篇
  1977年   71篇
  1976年   50篇
  1975年   62篇
  1974年   75篇
  1973年   86篇
  1972年   61篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
This paper reports results of a study based on a nationally representative sample of U.S. youth (N = 11,549) that asked two questions: (1) How does family structure affect the likelihood of adolescent death beyond that of race/ethnicity, sex, socioeconomic status, personal behavior, and other structural factors and (2) under what conditions might appeals for social justice be warranted for relative mortality statuses and for absolute gains in mortality? The study found that marital instability increases the likelihood of dying when controlling for a variety of other factors including class, race/ethnicity, sex, and unemployment rate in area of residence. The author argues that this finding lends support to social justice arguments to redistribute resources in such a way as to ensure the likelihood of absolute gains in mortality. The study also found, however, that race/ethnicity/sex also accounted for the likelihood of dying independently of family structure when controlling for socioeconomic and other factors. The author argues that this finding lends support to social justice arguments to redistribute resources on the basis of relative mortality statuses.  相似文献   
23.
Fibres used in forensic casework suffer from a disadvantage common to other forms of trace evidence--it is not possible to state with absolute certainty that they originate from a specific source. Target fibre studies, population studies and research on 'blocks of colour' have effectively demonstrated the polymorphism of textile fibres (particularly man-made ones) and have shown that when a fibre is believed to have a specific putative source, the chance that it has originated from a different source purely by coincidence is extremely remote. A study by Houck MM (Houck MM, Inter-comparison of unrelated fibre evidence. Forensic Science International 2003; 135: 146-149) has shown that no coincidental matching fibres were recovered from items of clothing examined in 20 unrelated crimes. The study involved over two million comparisons. This work goes a step further, and using the example of blue polyester fibres shows that even within a very narrow segment of the whole general fibre population, many examples of a specific colour/type of man-made fibre taken from random sources can be compared and the chance of any two being the same is very low. These studies should help to show the specificity and value of transferred fibres in providing forensic evidence.  相似文献   
24.
25.
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning.  相似文献   
26.
Archibald T. Strong, born in Melbourne, was the son of an Australian scholar who went to an academic post at Liverpool. The younger Strong received his secondary and tertiary education in England. There, he became proficient in modern European languages and literature. He initially planned a career in the law, but for health reasons returned to Australia to the Department of English at the University of Melbourne. Prior to the First World War, Strong became prominent in Melbourne literary circles and also a prolific commentator on world affairs. As an early member of the Round Table group in Australia, Strong assessed Imperial Germany as posing an existential threat to the British Empire and hence to Australia's security. The nation's future, he believed, lay in unwavering defence of the Empire. Strong evinced a distinct impatience with fellow citizens, especially on the socialist left, who failed, in his view, to understand the realities of Australia's position in the world and what was at stake in the Great War.  相似文献   
27.
Drawing on the strategic surprise, warning-response, and foreign policy literature, this article argues that the September 11 terror attacks should be regarded as a strategic surprise and examines a number of key factors that contributed to vulnerability and inhibited vigilance. Three broad explanatory "cuts" derived from the literature—psychological, bureau-organizational, and agenda-political—are deployed to sift through the rapidly expanding empirical record in an effort to shed light on the processes and contextual factors that left the United States vulnerable to the attacks. The article aims to improve our understanding of generic processes and practices that enhance or detract from vulnerability and vigilance.  相似文献   
28.
Decomposition studies were conducted using two carcasses of domestic pigs, Sus scrofa L., 8.4 kg and 15.1 kg in weight, to determine the effects of carcass size on the rate of decomposition, composition of the arthropod fauna, and succession patterns. A total of 46 arthropod taxa were recovered during this study. No size-related differences were observed between carcasses with respect to composition of the arthropod fauna or patterns of succession. A greater number of arthropods were observed attracted to the 15.1-kg carcass, and the rate of decomposition observed was more rapid for the 15.1-kg carcass than for the 8.4-kg carcass. Internal temperatures of the 8.4-kg carcass were more directly related to external ambient temperatures during the fresh and bloated stages of decomposition. During the decay stage, both carcasses generated internal temperatures significantly above ambient temperatures. Following this stage, internal temperatures fell to approximate ambient temperatures during the postdecay and remains stages.  相似文献   
29.
30.
Conclusion In 1984, after years of study and thorough debate, a bipartisan majority of the Congress enacted perhaps the most far-reaching reform of the federal criminal justice system in the history of the United States. The Sentencing Reform Act and the federal sentencing guidelines are now beginning to produce data indicating that the objectives of avoiding unwarranted disparity and invidious discrimination are being achieved.After an uncertain beginning, the guidelines are gaining acceptance by courts and criminal justice practitioners. As one appellate court observed in admonishing lower courts that the guidelines must be respected:We have embarked on a new course. Only time will tell whether the use of the guidelines will result in an improvement over the old system. But unless we follow the spirit and written directions of the guidelines, we will never know if they have been given a fair test. They at least deserve that.Indeed, the bold new approach to sentencing that is being followed today in federal courthouses throughout the United States deserves an opportunity to succeed, given its many beneficial features and the lofty goals toward which the reforms are directed. While ample work remains for the United States Sentencing Commission to monitor and improve the guidelines, indications at this still early date are that the experiment is succeeding.An earlier version of this paper was presented at the fifth conference of the Society for the Reform of Criminal Law, Parliament House, Edinburgh, Scotland, August 5–9, 1990. The views expressed herein are those of the authors and do not necessarily represent the official position of the United States Sentencing Commission.B.A., Davidson College 1964; J.D., University of South Carolina School of Law 1967.B.A., Ohio State University 1974; M.S., Arizona State University 1980; M.A., University of California, Santa Barbara, 1983.B.S., Clemson University 1971; M.S., Clemson University 1975; J.D., University of South Carolina School of Law 1978.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号