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   24469篇
  免费   1421篇
各国政治   1031篇
工人农民   1095篇
世界政治   1755篇
外交国际关系   847篇
法律   16591篇
中国共产党   2篇
中国政治   148篇
政治理论   4281篇
综合类   140篇
  2023年   120篇
  2021年   143篇
  2020年   529篇
  2019年   589篇
  2018年   750篇
  2017年   806篇
  2016年   883篇
  2015年   633篇
  2014年   728篇
  2013年   2602篇
  2012年   690篇
  2011年   724篇
  2010年   689篇
  2009年   703篇
  2008年   712篇
  2007年   748篇
  2006年   735篇
  2005年   588篇
  2004年   618篇
  2003年   549篇
  2002年   556篇
  2001年   904篇
  2000年   827篇
  1999年   657篇
  1998年   324篇
  1997年   238篇
  1996年   267篇
  1995年   257篇
  1994年   238篇
  1993年   237篇
  1992年   430篇
  1991年   435篇
  1990年   406篇
  1989年   403篇
  1988年   417篇
  1987年   389篇
  1986年   431篇
  1985年   436篇
  1984年   346篇
  1983年   340篇
  1982年   261篇
  1981年   234篇
  1980年   200篇
  1979年   295篇
  1978年   176篇
  1977年   148篇
  1976年   127篇
  1975年   132篇
  1974年   180篇
  1973年   135篇
排序方式: 共有10000条查询结果,搜索用时 633 毫秒
91.
The study presents a method for the demonstration of esophageal varices at autopsy by gastroesophageal phlebography. The veins visible on the radiographs were controlled and evaluated by studying the gross appearance of sections of the esophagus at the level of the varicose veins and by histologic examination of the sections. The phlebography was found to be useful in estimating the varicose and normal veins of the esophagus. The study indicates further that the degree of varicosity is not always proportional to the severity of cirrhosis of the liver, and there may be varicose esophageal veins in patients with liver or heart disorders without hepatic cirrhosis.  相似文献   
92.
This study examined the nature of police response to domestic violence incidents with a focus on the identification of areas of police intervention that female victims of domestic abuse find “most” helpful and “least” helpful. The first part of the study was based on the analysis of a random sample of incident reports of domestic abuse cases recorded in 2000 and 2001. These reports were examined to obtain information about the characteristics of domestic abuse victims and summary information about the incidents of domestic abuse offenses. The second stage of the research study involved a telephone survey conducted with a random sample of fifty female domestic abuse victims who called the police. The study examined female victims' perceptions of how the police responded to the domestic abuse incidents, how helpful or not so helpful victims found the police to be when they responded to their calls, and how their cases were handled by the legal system.  相似文献   
93.
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   
94.
95.
This study probes the interconnections among distrust of government, the historical context, and public support for the death penalty in the United States with survey data for area-identified samples of white and black respondents. Multilevel statistical analyses indicate contrary effects of government distrust on support for the death penalty for blacks and whites, fostering death penalty support among whites and diminishing it among blacks. In addition, we find that the presence of a "vigilante tradition," as indicated by a history of lynching, promotes death penalty support among whites but not blacks. Finally, contrary to Zimring's argument in The Contradictions of Capital Punishment , we find no evidence that vigilantism moderates the influence of government distrust on support for the death penalty, for either whites or blacks. Our analyses highlight the continuing influence of historical context as well as contemporary conditions in the formation of public attitudes toward criminal punishment, and they underscore the importance of attending to racial differences in the analysis of punitive attitudes.  相似文献   
96.
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   
97.
98.
99.
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   
100.
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   
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