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   17747篇
  免费   1175篇
各国政治   712篇
工人农民   875篇
世界政治   1155篇
外交国际关系   549篇
法律   12366篇
中国共产党   2篇
中国政治   106篇
政治理论   3059篇
综合类   98篇
  2023年   80篇
  2021年   89篇
  2020年   434篇
  2019年   453篇
  2018年   580篇
  2017年   591篇
  2016年   667篇
  2015年   511篇
  2014年   544篇
  2013年   1842篇
  2012年   492篇
  2011年   515篇
  2010年   537篇
  2009年   569篇
  2008年   532篇
  2007年   522篇
  2006年   528篇
  2005年   441篇
  2004年   442篇
  2003年   370篇
  2002年   409篇
  2001年   687篇
  2000年   609篇
  1999年   484篇
  1998年   243篇
  1997年   174篇
  1996年   196篇
  1995年   193篇
  1994年   174篇
  1993年   181篇
  1992年   310篇
  1991年   312篇
  1990年   294篇
  1989年   283篇
  1988年   309篇
  1987年   268篇
  1986年   323篇
  1985年   320篇
  1984年   251篇
  1983年   231篇
  1982年   182篇
  1981年   156篇
  1980年   148篇
  1979年   220篇
  1978年   116篇
  1977年   95篇
  1975年   94篇
  1974年   124篇
  1973年   79篇
  1972年   78篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
Ridley M 《Time》2000,155(8):84
  相似文献   
963.
All pumped up     
Horowitz JM 《Time》2000,155(8):107
  相似文献   
964.
965.
966.
967.
This paper analyzes the work of Mosquitia Pawisa (MOPAWI) in relation to the development of its strategic linkages among the grassroots, the state, and ultimately the international level of politics in practice. Over the years, MOPAWI has developed a large and complex program addressing many aspects of development in La Mosquitia. Working strategically at two levels, MOPAWI has endeavored to change government policy for the region through continued lobbying and advocacy. It has also worked alongside with local communities to find ways of improving livelihoods without harming the environment. The key strength of the MOPAWI work has been the high level of community participation and mobilization by managing their own development in a time of profound change. Overall, the experience of MOPAWI suggests that nongovernmental organizations can play a strategic role in obtaining environmental protection, government recognition of ethnic diversity, and rights for indigenous people.  相似文献   
968.
A 33 year-old Polish field-worker was found by his colleagues kneeling in front of his trailer, with a bloody stab wound in the heart region. In spite of prompt surgical intervention, the man died from his injury a few hours later. Upon examination of the dead man's trailer a blood-smeared vegetable-knife was found in the sink, and on the floor, a pullover with a slit-like cut. On the wall hung a jacket on a hook with a cut in the inner surface of the left breast pocket but not in the outside layer. The examination of the clothes, the autopsy and a reconstruction of the sequence of events led to the following conclusion: The knife had been placed into the breast pocket of the jacket with the tip facing downwards. As the man put down a sack of potatoes, the knife hooked into a pre-existing gap in the sack and was driven into the chest cavity by the pressure weight of the heavy sack.  相似文献   
969.
DNA contamination by examination instruments   总被引:1,自引:0,他引:1  
Using DNA-analysis systems in forensic examination, conditions without any (iatrogenic) contamination are necessary for analysis of evidence. Failing these conditions a contamination is possible and interpretation of the results may be difficult. Our experiments demonstrated a relevant transfer of DNA-material if contaminated instruments were used.  相似文献   
970.
A 40 year-old woman was killed by fist and chop blows and buried in a forest area far away from the scene of the homicide. Before covering the body with soil the perpetrator poured 25 kg of tile cement powder over it. When the victim was retrieved 6 weeks later, the cement had hardened covering the body like a plate and encasing it like a sheath. The surface of the tile cement facing towards the body was found to contain two kinds of traces: detailed cast-like reproduction of the textile structures of the victim's clothing and wallpaper-like epidermal adhesions. By means of sequencing the mitochondrial DNA the adherent horny scales could be related to the victim.  相似文献   
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