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   16272篇
  免费   521篇
  国内免费   5篇
各国政治   653篇
工人农民   722篇
世界政治   1067篇
外交国际关系   534篇
法律   10526篇
中国共产党   6篇
中国政治   153篇
政治理论   2967篇
综合类   170篇
  2020年   220篇
  2019年   268篇
  2018年   331篇
  2017年   386篇
  2016年   392篇
  2015年   291篇
  2014年   299篇
  2013年   1464篇
  2012年   445篇
  2011年   475篇
  2010年   390篇
  2009年   408篇
  2008年   493篇
  2007年   534篇
  2006年   513篇
  2005年   463篇
  2004年   453篇
  2003年   484篇
  2002年   417篇
  2001年   663篇
  2000年   538篇
  1999年   475篇
  1998年   242篇
  1997年   165篇
  1996年   200篇
  1995年   170篇
  1994年   196篇
  1993年   194篇
  1992年   321篇
  1991年   353篇
  1990年   338篇
  1989年   281篇
  1988年   319篇
  1987年   270篇
  1986年   317篇
  1985年   280篇
  1984年   229篇
  1983年   218篇
  1982年   175篇
  1981年   190篇
  1980年   127篇
  1979年   171篇
  1978年   122篇
  1977年   106篇
  1976年   96篇
  1975年   123篇
  1974年   132篇
  1973年   103篇
  1972年   100篇
  1969年   98篇
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
401.
The National Institute of Forensic Toxicology, Oslo, receives blood and urine samples from all Norwegian drivers apprehended on suspicion of driving under the influence of alcohol or drugs. In 1983 we received samples from 1446 drug-suspected drivers, out of which 445 underwent toxicological analysis. The drugs found most frequently were tetrahydrocannabinol (THC) (n = 199), diazepam (n = 166) and amphetamine (n = 102). A cautious interpretation of the data indicate that about 200 of the 445 subjects selected for toxicological analysis drove under severe influence of drugs. Because of the high percentage of submitted cases not analysed for drugs, this figure represents a minimum estimate. Compared with the results from 1978, we found a several-fold increase in detections of THC and amphetamine in 1983. The number of diazepam detections did not increase in a similar way, but we estimated that the diazepam detections would have increased 3-fold if we had analysed as frequent for this drug in 1983 as in 1978.  相似文献   
402.
The aims of the authors in this paper has been to check the diagnostic ability of the Cathepsin A, B and D concentrations in the skin wound edges to the differential diagnosis between vital and postmortem wounds. We have studied 56 domestic pigs grouped in seven experimental series consisting of 8 animals in each, according to the time (0, 5, 15, 30 min and 1, 3 and 6 h) after the injury. The enzymatic activities were investigated following the methods by Bowen and Davison Biochem. J., 131 (1973) 417-419, Suhar and Marks J. Biochem., 101 (1979) 23-30 and by Anson (modified by Yamamoto, Eur. J. Biochem., 95 (1979) 459-467) for Cathepsin A, B and D, respectively. For the differential diagnosis between vital and postmortem wounds, our results showed that the most useful markers studied are the Cathepsin A and D activities, Cathepsin D that of the first one.  相似文献   
403.
An alternative simplified procedure for the genetic analysis of salivary protein complex (SPC) which eliminates the need for a specific concentrated parotid sample is proposed. After the technique is applied isoelectric focusing and protein detection is carried out by silver staining. The chance of exclusion of non-fathers for these systems in our population is 0.161711 for Pr, 0.07948 for Db, 0.07836 for Pa and 0.00995 for PIF. The total exclusion rate for these systems is 0.30042.  相似文献   
404.
This paper examines Scottish licensing law, in particular the granting of licenses to supply alcoholic liquor. Any application for a license must be granted unless one or more of four conditions are fulfilled. One of these, that the award would lead to overprovision, is the central concern of this study. The paper does not investigate why the consumption and distribution of alcohol are regulated nor why regulatory control takes the form it does. 1 The starting point is rather that regulation exists and takes a particular form. Attention is focused on the operation of this regulatory control and with how it might be improved.In the next section, some of the key features of the licensing law and its appeals are reviewed, establishing the importance of evidence of the presence or otherwise of overprovision. Section II discusses the use of density of licensed premises as a measure of provision, indicates the problems, and argues that a measure might be refined and validated by entering it in an equation explaining the retail price of alcoholic beverages. Section III examines empirically the relationship between price and licensing density.  相似文献   
405.
Abstract

The current study surveyed a random sample of Texas law enforcement officers (n?=?109) about their knowledge regarding behaviors indicative of deception. The officers were not highly knowledgeable about this topic, overall performing at a chance level in assessing how various behavioral cues relate to deception. Confidence in one's skill was unrelated to accuracy, and officers who reported receiving the most training and utilizing these skills more often were more confident but no more accurate in their knowledge of the behaviors that typically betray deception. The authors compare these results to previous studies that have examined officers’ beliefs in other countries and discuss the implication of these results in terms of developing future training programs that may debunk the common misconceptions that officers possess.  相似文献   
406.
407.
408.
<正>Everyone is probably familiar with stock cultural figures of the Tiger Mom,or the obnoxiously loud,pushy sports-obsessed dad.If you are a Westerner and have participated in Little League Baseball as player,fan,or coach,you will know the scene only too well:a parent publicly berating his or her youngster for a lackluster performance.Sympathetic onlookers know better than to intervene,preferring  相似文献   
409.
ABSTRACT

Federal funding streams, the International Association of Chiefs of Police, and policing executives and scholars alike have advocated for more researcher-practitioner partnerships in American law enforcement. While a few studies have explored the growth and prevalence of research partnerships in policing, less attention has been placed on the organizational correlates of such collaborative relationships. Using a nationally representative sample of US law enforcement agencies, the current study investigated participation in what we term ‘rigorous partnerships’ – more formal, long-term relationships between researchers and practitioners with increased opportunity for interactive knowledge exchange. Policy implications and directions for future research are discussed, with a specific focus on the barriers and impediments that both parties face for successful collaborative efforts and research translation.  相似文献   
410.
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