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   10718篇
  免费   330篇
各国政治   326篇
工人农民   524篇
世界政治   631篇
外交国际关系   318篇
法律   6890篇
中国共产党   34篇
中国政治   142篇
政治理论   2043篇
综合类   140篇
  2023年   175篇
  2021年   94篇
  2020年   158篇
  2019年   136篇
  2018年   210篇
  2017年   250篇
  2016年   283篇
  2015年   235篇
  2014年   235篇
  2013年   886篇
  2012年   254篇
  2011年   293篇
  2010年   229篇
  2009年   300篇
  2008年   344篇
  2007年   355篇
  2006年   342篇
  2005年   313篇
  2004年   305篇
  2003年   247篇
  2002年   254篇
  2001年   357篇
  2000年   336篇
  1999年   261篇
  1998年   159篇
  1997年   120篇
  1996年   144篇
  1995年   116篇
  1994年   133篇
  1993年   131篇
  1992年   199篇
  1991年   257篇
  1990年   216篇
  1989年   203篇
  1988年   227篇
  1987年   202篇
  1986年   223篇
  1985年   194篇
  1984年   166篇
  1983年   163篇
  1982年   103篇
  1981年   128篇
  1980年   103篇
  1979年   108篇
  1978年   92篇
  1977年   78篇
  1976年   64篇
  1975年   65篇
  1974年   65篇
  1973年   77篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
951.
Private nonprofit organizations play a major role in delivering a range of publicly funded social services. Aggregate data from a recent Urban Institute study reveal that recent federal cutbacks have affected the services, programs and clients of NPOs. An examination of specific agencies in Maricopa County (Phoenix) reveals that many service providers have adopted a business approach to their services and clients, treating them as commodities. In general, agencies serving clients with Resource Mobilization Potential-youth and elderly-have fared better than those dealing primarily with poor adults.  相似文献   
952.
953.
The intradural sagittal diameter at the second cervical vertebra (SD/C2) of 62 SIDS cases was measured myelographically. This SD/C2 proved to be dependent on body size, body weight, and age. A clear, age-dependent difference is to be found in the primarily narrow spinal canal. This parameter (SD/C2), which is more precisely defined in adults on the basis of clinical, radiological, and autopsical findings is assumed to have the value of 0.5 cm in the first 2 months, 0.6 cm in the third month, and 0.65 cm in the fourth month. The resulting potential danger to infants is dependent upon their position. The SD/C2, was significantly decreased in extension as compared to a neutral posture. With consideration of the primarily narrow spinal canal in the infant, there is, according to our measurements, a potential hazard for the infant in any further, significant shortening of the SD/C2. This is independent of the width of the spinal canal under maximal extension. We found individual cases in which the SD/C2 was decreased by almost 50% from the normal value in neutral position. No correlation was found between the primary width of the spinal canal and the degree of luminal reduction upon extension.  相似文献   
954.
The sentencing literature generally has been characterized by an inability to explain Significant amounts of the variance in sentencing outcomes. Two major theoretical explanations have addressed this issue: structural-contextual theory and the “liberation hypothesis.” Structural-contextual theory suggests that the components of the justice system traditionally work somewhat independently of one another. This theory suggests that variance explained in sentence outcomes will increase appreciably when components function with greater interdependence—a so-called “tightening” or “coupling” effect. Such tightening supposedly takes place when particular cases are given high priority for investigation and prosecution. An example of this situation might be domestic terrorism. The liberation hypothesis suggests that the greater the severity of an offense, the less likely judges or juries will feel free to follow their own sentiments regarding guilt and punishment. As a consequence, the ability of legal variables to predict variation in sentence length will be greater as crime severity increases. This study compares a sample of officially designated terrorists matched with nonterrorists convicted of the same federal offenses. OLS regression and structural equation modeling procedures are used to compare the levels of explained variance for the two groups. The results indicate strong support for the basic premises of both theories. Explained variance for the terrorist sample is more than four times greater than the explained variance for the nonterrorist sample. Further analysis shows that explained variance is highest for terrorists who have committed a high-severity offense and lowest for nonterrorists who have committed a low-severity offense. The subsequent addition of other predictor variables available only for the terrorist sample further increases the explained variance and provides additional support for the liberation hypothesis.  相似文献   
955.
A case is presented involving a patient who underwent an intrapericardial pneumonectomy for lung cancer and died of cerebral hypoxia due to herniation of the heart. The etiology and pathophysiology of cardiac herniation are reviewed.  相似文献   
956.
957.
958.
The dermal surface (after enzymatic digestion of the dermo-epidermal junction) in electric and heat lesions is described. There do not appear to be elements that help in forming a precise differential diagnosis. It is possible, however, to differentiate these lesions from all traumatic cutaneous injuries and some limited nontraumatic lesions (e.g., verrucae). Remarkably good preservation of the dermal surface even in an advanced state of decomposition does suggest the possibility of certain diagnosis of electric and heat lesions even when postmortem phenomena have greatly damaged or even totally removed the epithelial part of the skin.  相似文献   
959.
The growth of mass media has complicated the relatioship between the courts and the media. Free press and fair trial rights are kept in balance by the use of judicial restraints and remedies such asvoir dire, change of venue, and gag orders. This balance has shifted back and forth during the past two decades. Current case law and legal codes are inconsistent and provide insufficient guidance to judges in their use of restraints and remedies. Nor is there a body of empirical research on the impact of news coverage and juror behavior capable of informing the courts at this time. In this paper, we review and critically assess the empirical social science literature as it pertains to the legal issues involving free press and fair trial. We argue that carefully conducted empirical research could provide important information to the courts. We suggest research directions and methodological caveats to increase legal relevance and scientific validity.  相似文献   
960.
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