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   21540篇
  免费   453篇
各国政治   802篇
工人农民   1472篇
世界政治   1201篇
外交国际关系   804篇
法律   12341篇
中国共产党   2篇
中国政治   101篇
政治理论   5140篇
综合类   130篇
  2020年   143篇
  2019年   222篇
  2018年   1492篇
  2017年   1459篇
  2016年   1286篇
  2015年   287篇
  2014年   280篇
  2013年   1517篇
  2012年   452篇
  2011年   1206篇
  2010年   1250篇
  2009年   892篇
  2008年   1057篇
  2007年   1014篇
  2006年   361篇
  2005年   398篇
  2004年   483篇
  2003年   453篇
  2002年   357篇
  2001年   492篇
  2000年   442篇
  1999年   351篇
  1998年   223篇
  1997年   192篇
  1996年   188篇
  1995年   204篇
  1994年   205篇
  1993年   183篇
  1992年   266篇
  1991年   300篇
  1990年   272篇
  1989年   294篇
  1988年   252篇
  1987年   254篇
  1986年   300篇
  1985年   295篇
  1984年   265篇
  1983年   261篇
  1982年   192篇
  1981年   175篇
  1980年   146篇
  1979年   192篇
  1978年   123篇
  1977年   135篇
  1976年   124篇
  1975年   87篇
  1974年   108篇
  1973年   101篇
  1972年   90篇
  1971年   80篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
A final course, or project is a standard requirement in Master of Public Administration (MPA) programs. This requirement is intended to permit the student to demonstrate advanced ability in the discipline. This article examines one such course at Florida State University. The course included readings, exercises, oral presentations, and a written report. This author assesses the merits and drawbacks of the course as well as notes the unintended consequences that resulted. In concluding the article, the author makes several recommendations for future courses based on the experiences gained in the Florida state model.  相似文献   
122.
123.
124.
The concentration of thyreoglobulin (tg) was determined for death caused by hanging, strangulation by ligature, and throttling. Cases of sudden death (traumatic aortic rupture, penetrating wounds of the heart) were used for comparison. The mean values in cases of hanging (149.9±202.3 ng/ml), strangulation by ligature (193.1±173.3), manual strangulation (561.6±173.9) are distinguishable from violent acute deaths (23.3±27.6) and living healthy individuals (17.3±16.1). By means of statistical comparisons, significant differences were found between throttling and strangulation by ligature and between throttling and hanging (adjusted P<0.001). In connection with examination of the bodies high tg values can be regarded as a vital reaction in obstructive asphyxia.  相似文献   
125.
126.
A number of recent studies have explored the consequences ofinterracial peer effects on the academic and social performanceof minority students. This article contributes to that discussion,focusing, however, on perceptions rather than behaviors. Theanalysis suggests that exposure to white peers is associatedwith declining perceptions of racial justice among black andLatino high school students. While cautioning against causalinterpretations of this finding, the article suggests that theintegrationist aims of Brown v. Board of Education will notbe satisfied without more thoughtful and vigorous desegregationefforts.  相似文献   
127.
"Brain death," the determination of human death by showing the irreversible loss of all clinical functions of the brain, has become a worldwide practice. A biophilosophical account of brain death requires four sequential tasks: (1) agreeing on the paradigm of death, a set of preconditions that frame the discussion; (2) determining the definition of death by making explicit the consensual concept of death; (3) determining the criterion of death that proves the definition has been fulfilled by being both necessary and sufficient for death; and (4) determining the tests of death for physicians to employ at the patient's bedside to demonstrate that the criterion of death has been fulfilled. The best definition of death is "the cessation of functioning of the organism as a whole." The whole-brain criterion is the only criterion that is both necessary and sufficient for death. Brain death tests are used only in the unusual case in which a patient's ventilation is being supported. Brain death critics have identified weaknesses in its formulation. But despite its shortcomings, the whole-brain death formulation comprises a concept and public policy that make intuitive and practical sense and that has been well accepted by many societies.  相似文献   
128.
129.
This paper describes an effort by industry and university partners to centralize manufacturing decision making through the development of generic simulation tools. This ongoing, cooperative process improvement initiative between the Industrial and Systems Engineering faculty at the University of Alabama in Huntsville (UAH) and Chrysler’s Huntsville Electronics Division (HED) permits the involved faculty to broaden their experience and technical expertise in electronics fabrication, while the industry partner benefits from the transfer of technical knowledge and advanced analysis methodologies from the university. The focus of the project is the definition of generic electronic manufacturing models that can be easily defined and implemented through common user-oriented interfaces, allowing users who are not familiar with simulation and simulation languages to address the needs of their particular functional areas.  相似文献   
130.
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