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   11487篇
  免费   352篇
各国政治   380篇
工人农民   449篇
世界政治   775篇
外交国际关系   388篇
法律   7713篇
中国政治   69篇
政治理论   2006篇
综合类   59篇
  2020年   145篇
  2019年   183篇
  2018年   231篇
  2017年   251篇
  2016年   269篇
  2015年   175篇
  2014年   241篇
  2013年   1030篇
  2012年   278篇
  2011年   304篇
  2010年   246篇
  2009年   265篇
  2008年   294篇
  2007年   322篇
  2006年   332篇
  2005年   252篇
  2004年   272篇
  2003年   301篇
  2002年   242篇
  2001年   496篇
  2000年   467篇
  1999年   355篇
  1998年   145篇
  1997年   126篇
  1996年   122篇
  1995年   116篇
  1994年   132篇
  1993年   111篇
  1992年   253篇
  1991年   250篇
  1990年   255篇
  1989年   262篇
  1988年   261篇
  1987年   268篇
  1986年   231篇
  1985年   253篇
  1984年   197篇
  1983年   205篇
  1982年   140篇
  1981年   137篇
  1980年   105篇
  1979年   146篇
  1978年   107篇
  1977年   88篇
  1976年   86篇
  1975年   72篇
  1974年   92篇
  1973年   85篇
  1971年   70篇
  1970年   70篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
143.
144.
145.
Programme based on mathematical model of the process of dead body temperature changing was developed for estimation of postmortem interval. Automatic retrieval of problem solution was performed on programmable microcalculators of "Electronica MK-61" type using adaptive approach. Diagnostical accuracy in case of dead body being preserved in permanent cooling conditions is +/- 3%.  相似文献   
146.
So far, the law in the Federal Republic of Germany still allows the injection of fresh-cell preparations from animals as a roborant to increase the vitality of the organism and to strengthen the body's immune defense system. The use of "sicca-cell" preparations was provisionally forbidden in 1987 by the Federal Health Organization (Bundesgesundheitsamt; BGA). Prohibition of fresh-cell injections would have exceeded the authority of this office, although the same serious reservations also applied in the case of this treatment method. Several publications that have appeared since 1955 have reported serious complications of this therapy, some life-threatening and some even lethal. Two further cases are now added: (1) A woman aged 69 had been receiving treatment with cell injections for 9 years. Immediately after an injection of sicca cells she collapsed and was hospitalized; 7 days thereafter she developed an ascending paralysis with increasing inability to swallow or breathe. She died 25 days after the injection as a consequence of central and peripheral respiratory failure. Autopsy revealed the alterations typical for acute Landry-Guillain-Barré-Strohl syndrome. (2) A 76-year-old healthy woman had been receiving treatment with fresh-cell preparations for several years. After an injection of cell suspensions a painful local swelling was observed. The symptoms were interpreted as the consequence of an iatrogenic local hematoma, and repeated punctures were performed to obtain blood. The patient was transferred to a surgical department for further therapy. Two days after the injection she suddenly died with signs of acute cardiovascular failure. Autopsy revealed the signs of a fulminating clostridial infection and also the characteristic signs of Landry-Guillain-Barré syndrome with involvement of the autonomic nervous system. In both cases the development of an inflammatory process in the peripheral nervous system could be interpreted as an immune-mediated allergic disease, related to the repeated injection of heterologous antigenic material containing nervous tissues. This hypothesis would also explain the two other cases already published and would be consistent with the observed perivenous leukoencephalopathy of the central nervous system. The human disease pictures correspond to the well-established animal models of EAEM (experimental allergic encephalomyelitis) and EAN (experimental allergic neuritis). The pathogenesis is discussed; the major role of the central and peripheral nervous system is stressed, with special reference to the risk of acute autonomic failure. The need for specific autopsy techniques for the investigation of the entire nervous system, including spinal cord, roots, spinal ganglia and peripheral nerves with sympathetic chains, is raised.  相似文献   
147.
148.
149.
150.
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