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   19182篇
  免费   1307篇
各国政治   884篇
工人农民   946篇
世界政治   1369篇
外交国际关系   667篇
法律   13085篇
中国共产党   2篇
中国政治   111篇
政治理论   3319篇
综合类   106篇
  2023年   100篇
  2021年   123篇
  2020年   489篇
  2019年   530篇
  2018年   673篇
  2017年   708篇
  2016年   771篇
  2015年   573篇
  2014年   630篇
  2013年   2124篇
  2012年   579篇
  2011年   582篇
  2010年   577篇
  2009年   601篇
  2008年   577篇
  2007年   586篇
  2006年   581篇
  2005年   470篇
  2004年   479篇
  2003年   394篇
  2002年   427篇
  2001年   695篇
  2000年   630篇
  1999年   502篇
  1998年   262篇
  1997年   181篇
  1996年   203篇
  1995年   204篇
  1994年   180篇
  1993年   186篇
  1992年   311篇
  1991年   321篇
  1990年   302篇
  1989年   278篇
  1988年   308篇
  1987年   269篇
  1986年   321篇
  1985年   321篇
  1984年   251篇
  1983年   230篇
  1982年   180篇
  1981年   157篇
  1980年   147篇
  1979年   220篇
  1978年   116篇
  1977年   95篇
  1975年   96篇
  1974年   128篇
  1973年   80篇
  1972年   82篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
The purpose of this study was to examine the relationship between job demands, job resources, and burnout, and to examine if burnout could predict both work and health-related outcomes among police officers. The participants were 223 Norwegian police officers, and data were collected using a questionnaire. The study was part of a national survey of both health care and non-health care professions. The overall level of burnout was low among police officers compared to other occupational groups tested in Norway. Both job demands and job resources were related to burnout, especially work-family pressure was an important predictor for all of the three burnout dimensions. Burnout predicted individual outcomes, such as psychosomatic complaints and satisfaction with life, as well as work outcomes, such as job satisfaction, intention to quit, and organizational commitment. Suggestions for potential interventions to reduce burnout and negative individual and organizational consequences are presented.  相似文献   
72.
73.
This paper investigates how North Korean behaviour towards boththe United States and South Korea is influenced by the popularityof the American President. The study applies theories relatingto strategic conflict avoidance and signalling to suggest thatthe American President is able to demonstrate a willingnessto use force when he is unpopular and as such is better ableto coerce Pyongyang. Using a time-series model, I demonstratethat the North Koreans become more cooperative towards the UnitedStates in response to decreases in presidential popularity andincreasing levels of US inflation. However, the study also showsthat the North Koreans do not alter their behaviour towardsthe South Koreans in response to low American President Popularityratings. The research, therefore, suggests that the North Koreansbelieve that the United States would be unable to launch a diversionaryattack in response to North Korean behaviour towards the South.This study provides a clear support for the strategic avoidanceof conflict hypothesis and suggests that the American Presidentsare best able to coerce North Korea when they are unpopularat home. Received for publication August 31, 2005. Accepted for publication December 21, 2005.  相似文献   
74.
75.
THE BOOKSHELF     
Books reviewed in this article:
G. Andrew Benjamin and Jackie Gollan, Family Evaluation in Custody Litigation: Reducing Risks of Ethical Infractions and Malpractice .  相似文献   
76.
In the statistical interpretation of forensic glass evidence it is standard practice to make the assumption of homogeneity of the refractive index (RI) of the source glass, or of localized homogeneity. However, the work of Locke and Hayes showed that, for toughened windscreen glass, this assumption might not be true. This work is well cited, but there appears to have been little follow-on published research. Furthermore, the toughening process is something known to affect the refractive index, and is a process that float glass does not undergo. Float glass is a major component of casework in New Zealand and for that reason it would be interesting to know whether the findings of Locke and Hayes apply when dealing with float glass. In this paper we describe an experiment similar to that of Locke and Hayes, systematically examining the variation of RI in a pane of float window glass. It was found that, although there were no systematic differences in refractive index, there were observable differences across the pane.  相似文献   
77.
Report of an unusual finding of bones on the shore of the Baltic Sea. Although the morphological findings appeared similar to a human foot skeleton, a quick identification as sea dog bone was possible.  相似文献   
78.
In many countries it is left to the discretion of the court to accept or reject conclusions based on sampling procedures as applied to the total drug exhibit. As an alternative to this subjective approach, a statistical basis is presented using binomial and hypergeometric distributions to determine a lower limit for the proportion of units in a population which contains a drug, at a given confidence level. A method for calculating the total weight of a drug present in a population within a given confidence interval is also presented. In the event of no failures (all units sampled contain a drug), a sample size of six or seven units is generally sufficient to state that a proportion of at least 0.70 of the population contains a drug at a confidence level of at least 90%. When failures do occur in the sample, point estimation is used as the basis for selecting the appropriate sample size.  相似文献   
79.
A case of the sudden death of a 14-month-old girl due to massive hemorrhage in a primitive neuroectodermal tumor (PNET) is presented along with a review of the relevant literature. PNET is a rare, malignant brain neoplasm occurring predominantly in children.  相似文献   
80.
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