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   26597篇
  免费   1421篇
各国政治   1109篇
工人农民   1155篇
世界政治   1822篇
外交国际关系   829篇
法律   17577篇
中国共产党   2篇
中国政治   167篇
政治理论   5181篇
综合类   176篇
  2021年   127篇
  2020年   494篇
  2019年   569篇
  2018年   728篇
  2017年   763篇
  2016年   833篇
  2015年   633篇
  2014年   690篇
  2013年   2693篇
  2012年   665篇
  2011年   738篇
  2010年   708篇
  2009年   757篇
  2008年   738篇
  2007年   736篇
  2006年   750篇
  2005年   658篇
  2004年   643篇
  2003年   564篇
  2002年   608篇
  2001年   998篇
  2000年   899篇
  1999年   711篇
  1998年   390篇
  1997年   289篇
  1996年   317篇
  1995年   312篇
  1994年   301篇
  1993年   306篇
  1992年   496篇
  1991年   520篇
  1990年   494篇
  1989年   497篇
  1988年   499篇
  1987年   456篇
  1986年   544篇
  1985年   541篇
  1984年   441篇
  1983年   424篇
  1982年   307篇
  1981年   275篇
  1980年   242篇
  1979年   344篇
  1978年   194篇
  1977年   197篇
  1976年   165篇
  1975年   159篇
  1974年   205篇
  1973年   158篇
  1972年   151篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
The extent to which local life circumstances influence criminal activity has been the focus of much theoretical debate. Although empirical research has been initiated, it remains limited. Herein, we use data on 524 serious offenders from the California Youth Authority for a seven‐year post‐parole period to examine the relationship between changes in local life circumstances and criminal activity. We extend previous research by employing a statistical model that accounts for the joint distribution of violent and nonviolent crime during the late teens and twenties in order to present information on patterns of criminal activity during a newly recognized developmental period of the life course, “emerging adulthood.”  相似文献   
93.
On the basis of the uncertainty management model, we argue here that when people are uncertain about an organization's trustworthiness, they may resolve the question how they should react toward the organization by relying on their perceptions of the organization's procedures. As a consequence, we predicted that the reactions of parents whose child was in a day care center would be strongly influenced by their perceptions of the procedures used by the organization that was responsible for their children's day care when the parents would be uncertain about the organization's trustworthiness. However, when parents would be certain that the organization could be trusted they would be less in need of procedural information, yielding less strong effects of perceived procedure on parents' reactions. The findings of a survey study corroborate this line of reasoning. In the discussion it is argued that these findings suggest that people especially rely on their perceptions of procedures when they are uncertain about important aspects of their lives, such as the trustworthiness of organizations that are responsible for their children's day care.  相似文献   
94.
This study presents an approach to harnessing the power of case studies for research evaluation calledR&D value mapping (RVM). While this method uses case studies in the traditional manner to provide in-depth insights, it also structures case studies through an analytical framework that yields quantitative data and less subjective “lessons learned”. When properly applied, RVM can yield an inventory of outcomes and empirical generalizations regarding the determining variables. A particular advantage of the approach is that it not only provides an indication of the type and amount (though not a single numerical index) of outcome, but also gives insight into the reasons outcomes are achieved. Thus, RVM is useful for policy management strategies seeking to replicate success. The specific steps associated with the RVM method are illustrated through studies that have applied the technique. The authors gratefully acknowledge support from of the Department of Energy, Basic Energy Sciences and previous contracts from Sandia National Laboratories and the New York State Energy Research & Development Authority. A number of persons have made useful comments on the RVM method. We are particularly grateful to David Roessner, Juan Rogers, Gretchen Jordan and Iran Thomas.  相似文献   
95.
96.
97.
Bone fragments were stored in water for 2 years at room temperature and investigated serologically using the following methods: Absorption-elution, extraction of blood group substances and immunohistochemistry (PAP). All 3 methods gave essentially specific results for fresh bone tissue but with putrid bone tissue unspecific reactions were found predominantly with the absorption-elution and PAP techniques. In contrast, more specific reactions were obtained from the extracts although they were much weaker. From this it can be concluded that pure physical binding plays a substantial role in the unspecific reaction between antibodies and bone material. It is suggested that the relevant physical properties are altered by putrification.  相似文献   
98.
99.
This paper addresses two neglected areas in the research on the relationship between family violence and violence outside the home: violence other than parent-child abuse and the effect of gender. Specifically, we consider both parental and sibling violence as independent variables, nonfamily violence as the dependent variable, and gender as the specification variable. The data were collected from a sample of 306 students in Introductory Sociology and Social Problems classes. The finding of particular importance is that the interaction between the gender of both the aggressor and the victim has a significant effect on the relationship between violence within the home and nonfamily violence.  相似文献   
100.
This paper explores the capacity of alternative theoretical perspectives to explain the self-reported criminality of black and white young adult females. When criminal involvement is regressed on the theory operation-alizations separately by race, a key difference emerges: For white women, significant effects are clustered in the social-psychological theory groups (bonding, attitudes, and maturation), but for the black women the social-psychological variables have only scattered and inconsistent eflects. Instead, for black women structural indicators emerge as the important predictors of criminal involvement.  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