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   7458篇
  免费   271篇
各国政治   295篇
工人农民   379篇
世界政治   425篇
外交国际关系   302篇
法律   4769篇
中国政治   59篇
政治理论   1455篇
综合类   45篇
  2021年   54篇
  2020年   118篇
  2019年   119篇
  2018年   243篇
  2017年   228篇
  2016年   268篇
  2015年   162篇
  2014年   151篇
  2013年   587篇
  2012年   302篇
  2011年   276篇
  2010年   171篇
  2009年   187篇
  2008年   220篇
  2007年   178篇
  2006年   199篇
  2005年   547篇
  2004年   262篇
  2003年   171篇
  2002年   161篇
  2001年   244篇
  2000年   177篇
  1999年   149篇
  1998年   80篇
  1997年   71篇
  1996年   62篇
  1995年   81篇
  1994年   66篇
  1993年   75篇
  1992年   123篇
  1991年   133篇
  1990年   129篇
  1989年   117篇
  1988年   126篇
  1987年   118篇
  1986年   148篇
  1985年   152篇
  1984年   112篇
  1983年   100篇
  1982年   60篇
  1981年   49篇
  1979年   53篇
  1978年   48篇
  1975年   48篇
  1974年   68篇
  1973年   44篇
  1972年   47篇
  1971年   54篇
  1970年   45篇
  1968年   48篇
排序方式: 共有7729条查询结果,搜索用时 14 毫秒
41.
Collaborative Environmental Management: What Roles for Government?   总被引:1,自引:0,他引:1  
  相似文献   
42.
Abstract. Palle Svensson in this issue of EJPR has objected to the characterisation of Danish voters made by Franklin and others who, in various publications, expounded the thesis that on issues of low salience, referendum votes tend to follow party lines. Svensson finds evidence that the Maastricht Treaty was not an issue of low salience to Danish voters in the ratification referendums conducted there, and gives other details of the evolution of public opinion regarding Europe that clarify the circumstances in which our thesis should apply. In the light of his arguments, this Comment presents a more nuanced version of the thesis that learns from the Danish case, and should be of greater utility than our earlier version in helping to interpret the role of government standing in referendum outcomes.  相似文献   
43.
Current research suggests that a husband's substance abuse is correlated with severity of physical abuse and the woman's decision to leave a violent situation. Often, only the battered woman's report of abuse is available. This study compares women's reports of their partners' substance use/abuse with their partners' report using a brief measure of polydrug and alcohol abuse, the Substance Abuse Subtle Screening Inventory (SASSI) and the Conflict Tactics Scale (CTS). Data were analyzed for 25 recovery couples and 25 nonrecovery couples. The correlations for all 50 couples between the male's reported use and the female's report of her partner's use on the SASSI and the CTS were significant on all but one of the CTS scales. They ranged on SASSI from .73 to .33 and from .31 to .06 on the CTS. This suggests that the SASSI and possibly the CTS could be used as valuable tools for assessing women's reports of their partner's substance use/abuse.  相似文献   
44.
45.
46.
47.
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP).  相似文献   
48.
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling.  相似文献   
49.
Toxicologic findings in the USS Iowa disaster.   总被引:5,自引:0,他引:5  
The toxicologic results from the 47 victims of the explosion on the USS Iowa are presented. Good correlation between carboxyhemoglobin saturations and cause of death was found. There were no correlations between blood cyanide concentrations and causes of death. Volatile analysis suggested postmortem ethanol production rather than antemortem ethanol ingestion. No drugs except nicotine were detected in any of the victims.  相似文献   
50.
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