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   19002篇
  免费   387篇
各国政治   555篇
工人农民   1509篇
世界政治   847篇
外交国际关系   648篇
法律   11462篇
中国共产党   34篇
中国政治   133篇
政治理论   4058篇
综合类   143篇
  2021年   73篇
  2020年   165篇
  2019年   157篇
  2018年   1472篇
  2017年   1429篇
  2016年   1287篇
  2015年   317篇
  2014年   270篇
  2013年   1023篇
  2012年   450篇
  2011年   1178篇
  2010年   1200篇
  2009年   853篇
  2008年   1067篇
  2007年   1041篇
  2006年   380篇
  2005年   388篇
  2004年   483篇
  2003年   415篇
  2002年   290篇
  2001年   370篇
  2000年   351篇
  1999年   273篇
  1998年   175篇
  1997年   135篇
  1996年   170篇
  1995年   145篇
  1994年   159篇
  1993年   133篇
  1992年   210篇
  1991年   261篇
  1990年   227篇
  1989年   208篇
  1988年   225篇
  1987年   205篇
  1986年   230篇
  1985年   208篇
  1984年   178篇
  1983年   173篇
  1982年   117篇
  1981年   127篇
  1980年   107篇
  1979年   109篇
  1978年   98篇
  1977年   89篇
  1976年   66篇
  1975年   65篇
  1974年   69篇
  1973年   81篇
  1969年   51篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
The present study examines the extent to which neighborhood and social psychological influences predict childhood violence among 867 African‐American youth. The results showed that neighborhood affluence was the only neighborhood‐level variable to exert a significant influence on childhood violence. Furthermore, childhood violence was significantly related to social psychological influences, such as adopting a street code, associating with violent peers, parental use of violence, and quality parenting. Overall, the findings suggested that simply living in a violent neighborhood does not produce violent children, but that family, peer, and individual characteristics play a large role in predicting violence in childhood.  相似文献   
102.
The social development model (SDM) is a theory of behavior that has proven useful in explaining the etiology of delinquency, violence, and substance use among adolescents as well as early antisocial behavior among pre-adolescents. A further test of the model is its generalizability across population groups. A section of the SDM representing prosocial influences in the etiology of problem behavior was compared for boys and girls and for children from low- and non low-income families using three waves of child, parent and teacher survey data on a sample of 851 elementary school students. Multiple group structural equation modeling was used to assess differences across groups in both measurement of model constructs and hypothesized structural paths between constructs. The results indicate overall similarity in the reliability of measurement models and validity of structural models.  相似文献   
103.
This article reviews the laws in Sweden concerning mentally disordered offenders. It also contains some figures on the relationship between mentally disordered offenders and other offenders sentenced to prison. The rules in Sweden are very different from other countries in that the responsibility concept has been abolished and thus there is no acquittal on a psychiatric basis.  相似文献   
104.
吕军书 《学习论坛》2005,21(12):33-34
进入21世纪,中国外经贸迎来了国际贸易规则的种种挑战,这些挑战虽已在人们的意料之中,但就其复杂程度而言,又出乎人们意料之外。种种迹象显示,正当中国企业发力进军海外市场之时,中国也步入了国际经贸摩擦的高发期。我们必须正视国际经贸摩擦问题,认真分析国际经贸摩擦产生的原因,从而更好地采取措施去应对国际经贸摩擦。  相似文献   
105.
This study examines a crucial question: What kind of effect do interdiction and other drug enforcement activities have on drug smuggling? Do they actually deter smuggling, or is their effect more one of disruption and displacement?...  相似文献   
106.
107.
108.
In order to cooperate with voluntary screening programs aimed at the surveillance of the HIV epidemic in Finland, we have studied medicolegal autopsies for HIV antibodies since 1986 using an enzyme immunoassay on postmortem sera. The investigation covered 47.4% and 39.2%, respectively, of all deaths under the age of 65 years in the metropolitan areas of Helsinki and Turku--two cities on the densely populated southern coast of Finland from which most HIV infections have thus far been detected. Nine HIV-positive cases (0.12%) were detected among the 7305 medicolegal autopsies tested in 1986 to 1990. This figure is higher than the prevalence of 0.01 to 0.03% in voluntary screening programs for the general population would suggest. Seven of our cases had previously tested positive, and two were previously unknown cases, indicating that people at high risk are clustered in the medicolegal autopsy series. Of the six cases in an early stage of infection, three committed suicide suggesting the importance of HIV-screening in suicide cases in tracing symptomless HIV carriers. Five of the cases were detected in 1990, a year when the number of new HIV infections had more than doubled compared to the previous two years. This suggests that testing of medicolegal autopsies as surrogate tests for the population gives useful information even in low-prevalence areas like Finland. Such testing has none of the ethical problems of many other back-up surveys, and may be particularly sensitive to early changes in epidemiology.  相似文献   
109.
Distinctive blunt force injuries caused by a crescent wrench.   总被引:1,自引:0,他引:1  
  相似文献   
110.
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