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   2946篇
  免费   106篇
各国政治   241篇
工人农民   120篇
世界政治   185篇
外交国际关系   135篇
法律   1825篇
中国政治   31篇
政治理论   495篇
综合类   20篇
  2023年   15篇
  2022年   18篇
  2021年   22篇
  2020年   67篇
  2019年   73篇
  2018年   111篇
  2017年   138篇
  2016年   118篇
  2015年   63篇
  2014年   80篇
  2013年   427篇
  2012年   86篇
  2011年   100篇
  2010年   95篇
  2009年   82篇
  2008年   101篇
  2007年   95篇
  2006年   76篇
  2005年   90篇
  2004年   79篇
  2003年   71篇
  2002年   79篇
  2001年   76篇
  2000年   60篇
  1999年   60篇
  1998年   31篇
  1997年   26篇
  1996年   31篇
  1995年   17篇
  1994年   20篇
  1993年   24篇
  1992年   31篇
  1991年   40篇
  1990年   44篇
  1989年   47篇
  1988年   41篇
  1987年   31篇
  1986年   39篇
  1985年   31篇
  1984年   24篇
  1983年   19篇
  1982年   16篇
  1981年   23篇
  1980年   14篇
  1979年   21篇
  1978年   23篇
  1977年   20篇
  1971年   18篇
  1970年   18篇
  1968年   18篇
排序方式: 共有3052条查询结果,搜索用时 15 毫秒
981.
982.
Rules governing the global environment and the international economy are currently decided in separate arenas. Yet, environmental agreements can have strong economic implications, particularly with the growing use of market mechanisms. Economic liberalization rules, meanwhile, may limit the effectiveness of environmental agreements. This paper assesses the potential interaction between one important market-based environmental mechanism – the Clean Development Mechanism of the Kyoto Protocol on climate change – and the framework of international investment law.  相似文献   
983.
984.
985.
Possible use of monoclonal antibodies anti-H in absorption-elution reaction was studied. Blood and secretion stains on gauze were analysed. Practical usefulness of monoclonal antibodies anti-H for investigation of human blood and secretions was stated. Differences in interaction of monoclonal antibodies with traces of different origin were found.  相似文献   
986.
987.
Faced with evidence of an appallingly low standard of living which the vast majority of men and women in Nigeria have despite two decades of development and cooperative movements, the Federal and State Governments now attempt to ensure that the real target of development are the human beings who will remain central to all redefinitions and to all revised strategies. This study proposes a theoretical framework for cooperative education and training programmes in the rural areas of Nigeria in order to raise the level of understanding and performance of cooperative members. The approach is primarily an amalgam of the general process model of organization systems and McGrath's problem - based/problem - solving systems. Application of the approach subsequently suggests a method of scientific inquiry which this paper conceives as the Cooperative Education Working Model. To be most effective, Nigerian cooperators must regard cooperative education and training as a vital benefit which their membership provides for them.  相似文献   
988.
A 19-year-old drug-dependent man tried to commit suicide by intravenous self-injection of 5 ml concentrated mercury II chloride solution. He arrived at an intensive-care unit 2 h later with predominantly gastrointestinal symptoms and died 70 h later, despite hemodialysis and antidote therapy. The pathologic-anatomical picture was dominated by severe acute sublimate nephrosis and a coagulation disorder. The highest Hg content was found in the kidneys (5.69 mg%); in the gastrointestinal tract the Hg concentration lay between 1.12 and 3.26 mg%.  相似文献   
989.
Drug packets are usually detected by ordinary abdominal radiographs, which is of major importance in the apprehension and prosecution of drug body packers, but false negatives may occur. We report the case of a cocaine body packer who had used the prograde route and in whom the initial abdominal plain films were normal. The diagnosis of cocaine body packing was assessed by seldom-described complementary methods of detection, including drug detection in the urine and contrast study of the bowel.  相似文献   
990.
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