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   69713篇
  免费   3036篇
各国政治   4599篇
工人农民   2896篇
世界政治   6053篇
外交国际关系   3908篇
法律   32515篇
中国共产党   12篇
中国政治   763篇
政治理论   21023篇
综合类   980篇
  2021年   403篇
  2020年   1174篇
  2019年   1530篇
  2018年   1700篇
  2017年   2007篇
  2016年   2218篇
  2015年   1842篇
  2014年   2122篇
  2013年   10795篇
  2012年   1642篇
  2011年   1754篇
  2010年   1868篇
  2009年   2103篇
  2008年   1805篇
  2007年   1771篇
  2006年   1934篇
  2005年   1822篇
  2004年   1727篇
  2003年   1529篇
  2002年   1606篇
  2001年   1489篇
  2000年   1337篇
  1999年   1195篇
  1998年   1124篇
  1997年   1011篇
  1996年   983篇
  1995年   932篇
  1994年   924篇
  1993年   956篇
  1992年   979篇
  1991年   1017篇
  1990年   936篇
  1989年   986篇
  1988年   964篇
  1987年   1006篇
  1986年   965篇
  1985年   1032篇
  1984年   932篇
  1983年   1000篇
  1982年   896篇
  1981年   844篇
  1980年   658篇
  1979年   688篇
  1978年   596篇
  1977年   542篇
  1976年   495篇
  1975年   418篇
  1974年   424篇
  1973年   440篇
  1972年   381篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
271.
272.
273.
274.
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   
275.
Lancaster  Thomas D. 《Publius》1997,27(4):115-134
Acknowledging Spain's diversity, this article assesses the impactof nationalism, regionalism, and other factors on public opinionabout the country's young democratic institutions. Utilizingsurvey data, the analysis focuses on national and regional variationsin public preferences for central state institutions and federalistor other designs for state-regional relations. It concludesthat a strong base of support exists for the current democraticsystem and the institutions through which it is implemented.Nevertheless, some doubts remain about the basic state structureof central-regional relations.  相似文献   
276.
277.
Correlation between plasma and bone marrow tricyclic antidepressants has not been studied before. Two groups of rabbits were given 10 and 20 mg of desipramine/kg body weight, respectively. Desipramine was administered to the animals once daily by mouth for 5 days. On the fifth day the animals were sacrificed and blood and bone marrow samples were collected and analyzed using a high performance liquid chromatographic (HPLC) method. Data showed that a correlation exists between bone marrow and blood desipramine. The bone marrow desipramine concentration increased as its blood levels increased. The average ratio of bone marrow to blood desipramine +/- S.D. (standard deviation) in both dosage groups was 37.2 +/- 4.46 with a range of 30.99-44.82. This investigation is promising and shows that bone marrow could be used as an alternative tissue in the absence of a suitable blood sample.  相似文献   
278.
279.
280.
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