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   23289篇
  免费   644篇
各国政治   1051篇
工人农民   825篇
世界政治   1826篇
外交国际关系   859篇
法律   14033篇
中国共产党   3篇
中国政治   93篇
政治理论   4980篇
综合类   263篇
  2020年   266篇
  2019年   327篇
  2018年   432篇
  2017年   512篇
  2016年   547篇
  2015年   387篇
  2014年   451篇
  2013年   2373篇
  2012年   586篇
  2011年   603篇
  2010年   473篇
  2009年   511篇
  2008年   612篇
  2007年   609篇
  2006年   592篇
  2005年   513篇
  2004年   532篇
  2003年   556篇
  2002年   513篇
  2001年   910篇
  2000年   831篇
  1999年   683篇
  1998年   351篇
  1997年   332篇
  1996年   269篇
  1995年   274篇
  1994年   322篇
  1993年   284篇
  1992年   469篇
  1991年   509篇
  1990年   454篇
  1989年   479篇
  1988年   443篇
  1987年   451篇
  1986年   478篇
  1985年   440篇
  1984年   392篇
  1983年   419篇
  1982年   318篇
  1981年   303篇
  1980年   232篇
  1979年   332篇
  1978年   221篇
  1977年   196篇
  1976年   181篇
  1975年   179篇
  1974年   209篇
  1973年   184篇
  1972年   166篇
  1971年   145篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
This article discusses relevant literature on the potential benefits of sport, recreation, and leisure, and how these benefits relate to rehabilitation of juveniles. Many professionals involved in juvenile rehabilitation believe sport and recreation are beneficial adjuncts to treatment programming; however, it can be difficult to structure sport and recreation in ways that directly correspond to treatment goals. The purpose of this article is to provide insights for professionals working with juveniles on how sport and recreation programming can be an effective means of helping to achieve rehabilitation goals. Attention is given to approaches, particularly the Teaching Games for Understanding model (Bunker & Thorpe, 1982), which can be used to effectively link recreation and sport to the rehabilitation process.  相似文献   
73.
With new technically advanced methods and computers at our disposal, the efficient market hypothesis is once again being debated. At the same time, we are witnessing an unprecedented growth in both existing and new financial markets. These new markets are often in economies which have just recently embraced free market economics; we term these stock markets infant markets. Such stock markets are obviously not efficient in allocating the supply of savings to productive capital. We do not test whether or not these infant markets are informationally efficient, but instead examine whether and how they are becoming more efficient. We propose modelling the excess returns of individual securities using a multi-factor model with time-varying coefficients and generalised auto-regressive conditional heteroskedastic (GARCH) errors. If the markets are becoming more informationally efficient or the agents are learning, we would expect this to manifest itself as the time-varying coefficients becoming more stable as time increases. We test our model using data on four Bulgarian shares. First, we estimate an AR(2) model and a GARCH-M(1,1) model for the shares. Then, we estimated our AR(2) model with time varying coefficients and GARCH type errors. We find varying levels of efficiency and varying speeds of movement towards efficiency within our sample of four shares.  相似文献   
74.
75.
76.
77.
The Tax Reform Act of 1986 rewrote the federal income tax code, bringing it closer to policy professionals' vision of what constitutes an equitable and efficient income tax. Research on tax compliance suggests the law might have affected taxpayer compliance in three ways: by reducing opportunities to overstate deductions, by changing perceptions of fairness, and by altering tax liabilities. Changes in taxpayer perceptions, attitudes, and noncompliance intentions were examined in three bodies of survey data, each containing pre-and post-reform data from independent samples of the same population. The results show an improved normative climate for taxpayer compliance and point to both the feasibility and the importance of examining the effects of substantive tax policies on taxpayer perceptions, attitudes, and behavioral intentions.  相似文献   
78.
79.
80.
The formation of adequate mental health systems within prisons has accelerated as a result of successful class action lawsuits. Our recent national survey questioned all state correctional departments about the existence of standards in each system, compliance with such standards, prevalence of class action lawsuits involving the issue of providing adequate mental health services for inmates, issues related to consent decrees, available mental health resources within the correctional system, and the administrative structure of the mental health system. Our purpose was to identify those factors correlated with certified class action lawsuits involving issues related to mental health services. Twenty-one states were involved in such litigation. Only the presence of psychiatric hospitals operated by the department of corrections correlated with the presence of certified class action lawsuits involving mental health services. Prison systems larger than 15,000 inmates were at higher risk for such litigation. Smaller systems having psychiatric hospitals run by the state mental health agency appeared to be at less risk for such litigation.  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