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   19539篇
  免费   696篇
  国内免费   5篇
各国政治   880篇
工人农民   809篇
世界政治   1394篇
外交国际关系   780篇
法律   11822篇
中国共产党   8篇
中国政治   190篇
政治理论   4150篇
综合类   207篇
  2021年   111篇
  2020年   263篇
  2019年   332篇
  2018年   430篇
  2017年   499篇
  2016年   500篇
  2015年   360篇
  2014年   387篇
  2013年   2046篇
  2012年   513篇
  2011年   567篇
  2010年   484篇
  2009年   504篇
  2008年   584篇
  2007年   627篇
  2006年   610篇
  2005年   579篇
  2004年   552篇
  2003年   569篇
  2002年   521篇
  2001年   735篇
  2000年   614篇
  1999年   536篇
  1998年   301篇
  1997年   221篇
  1996年   231篇
  1995年   219篇
  1994年   249篇
  1993年   239篇
  1992年   360篇
  1991年   405篇
  1990年   368篇
  1989年   327篇
  1988年   346篇
  1987年   302篇
  1986年   350篇
  1985年   315篇
  1984年   259篇
  1983年   259篇
  1982年   208篇
  1981年   229篇
  1980年   157篇
  1979年   206篇
  1978年   151篇
  1977年   124篇
  1976年   127篇
  1975年   137篇
  1974年   147篇
  1973年   118篇
  1972年   111篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
We report a case of rapid death from thrombotic thrombocytopaenic purpura (TTP) in a young pregnant lady who developed full blown symptoms soon after caesarean section. Extensive intramyocardial confluent haemorrhages and widespread microthrombi in heart, brain, adrenals and kidney were found at autopsy. Thrombotic thrombocytopaenic purpura is an uncommon condition, which carries a high fatality rate if untreated. Awareness of this syndrome together with its high risk of sudden death underlines the importance of rapid diagnosis and treatment.  相似文献   
102.
A new solid-phase extraction procedure for the determination of cocaine and benzoylecgonine in amniotic fluid, using high flow co-polymeric sorbents is reported. The recoveries of cocaine and benzoylecgonine within the range 0.1-1 mg/l were 95.7% and 50.3%, respectively. The use of high-flow sorbents allowed the easy extraction of amniotic fluid regardless of sample viscosity or physical nature. The use of these solid-phase columns provided many advantages over the more commonly used solvent extraction, including an increase in extraction speed and efficiency, reduced operator time, reduced solvent use and disposal volumes and exceptional extract quality. Further, the determination of amniotic fluid obtained from pregnant cocaine users may provide important information about handling of cocaine by the fetus at various gestational ages. The procedure was successfully applied to amniotic fluid from suspected cocaine abusers.  相似文献   
103.
In many types of social situations, individuals defend their claims to a portion of the rewards by arguing that they are just. Although a great deal of research demonstrates that individuals differ in their distribution preferences and thus their beliefs about what is fair, the literature curiously omits consideration of the consequences of these differences, especially the conflict they may engender. This paper first reviews the few attempts to address such justice conflict. The limitations of these approaches suggest concerns to be addressed in an alternative framework. The paper presents a theoretical discussion of this alternative that integrates assumptions about distribution preferences, justice beliefs, conditions fostering the emergence of justice conflict, and elements of negotiation processes as a basic framework for predictions about the bargaining strategies individuals may employ to resolve competing justice claims.  相似文献   
104.
105.
106.
The legacy of severe environmental degradation inherited by the new Central and Eastern European (CEE) economies requires liability reform to aid the cleanup of existing pollution sources and create incentives for future environmental risk reduction. The paper analyzes a host of liability approaches to meet these goals, given economic and institutional characteristics specific to the CEE nations, and explores the impact of environmental liability rules on privatization and foreign investment. A principal conclusion of the analysis is that, for a host of efficiency-based reasons, liability should not be retroactively applied to the new owners of privatized firms. Also, the paper advocates the use of national liability funds to finance the cost of existing liabilities, while highlighting dangers associated with their use. In addition to the desirability of alternative privatization mechanisms, the paper also analyzes altemative liability rules to govern prospective environmental hazards.  相似文献   
107.
108.
109.
110.
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