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   20313篇
  免费   614篇
各国政治   823篇
工人农民   760篇
世界政治   1629篇
外交国际关系   693篇
法律   12519篇
中国共产党   2篇
中国政治   117篇
政治理论   4198篇
综合类   186篇
  2020年   248篇
  2019年   294篇
  2018年   385篇
  2017年   469篇
  2016年   482篇
  2015年   349篇
  2014年   398篇
  2013年   1916篇
  2012年   479篇
  2011年   528篇
  2010年   411篇
  2009年   457篇
  2008年   530篇
  2007年   531篇
  2006年   527篇
  2005年   474篇
  2004年   485篇
  2003年   505篇
  2002年   451篇
  2001年   824篇
  2000年   725篇
  1999年   594篇
  1998年   317篇
  1997年   284篇
  1996年   237篇
  1995年   249篇
  1994年   284篇
  1993年   267篇
  1992年   408篇
  1991年   433篇
  1990年   400篇
  1989年   396篇
  1988年   387篇
  1987年   406篇
  1986年   420篇
  1985年   422篇
  1984年   355篇
  1983年   384篇
  1982年   282篇
  1981年   269篇
  1980年   196篇
  1979年   274篇
  1978年   197篇
  1977年   168篇
  1976年   146篇
  1975年   149篇
  1974年   180篇
  1973年   140篇
  1972年   136篇
  1971年   122篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
A 22-year-old Korean soldier, who had received blows to the neck and epigastrium from an officer 10 h earlier, suddenly died after massive hematemesis. He had been in relatively good health except for episodes of blood-tinged vomiting approximately 5 and 7 months prior to this event. Postmortem examination revealed angiodysplasia involving the gastroesophageal junction, and the stomach was distended with blood. No abnormal findings were present around the whole viscera, and the duodenum was free of blood. The pathologic significance of upper gastrointestinal angiodysplasia as a potential source of bleeding and a chronologic correlation between the trauma and bleeding are discussed.  相似文献   
112.
Conclusion So can the Scots learn from Woolf? The answer must be in the affirmative, for his review points up similar problems to those we encounter here. There is no room for complacency in the civil justice system in Scotland, particularly in the field of Information Technology, where court systems and expertise are sadly lacking. It is clear that there is a need for a system of case management in all civil courts, targeted in particular areas or on particular cases, but only after a rigorous reappraisal of court timetabling; and that the public will lose confidence in a civil justice system which does not meet their needs for speedy and affordable decisions, perhaps by turning their backs on it and seeking means of Alternative Dispute Resolution. As for written pleadings, perhaps the most that can be said is that the case for their complete abolition is “not proven”, but that thestatus quo should not be maintained is beyond reasonable doubt. Sheriff of Lothian and Borders at Edinburgh; Member, Sheriff Court Rules Council.  相似文献   
113.
European Journal of Law and Economics - In this article I try to find answers for three questions: Which functions are exercised by the Court of Audit in the Netherlands, and what kinds of...  相似文献   
114.
The primary aim of this paper is to review the literature on preadolescent friendships in order to examine the relationship between preadolescent friendships and social support in adulthood. Social supports are important to health, both directly and as a stress buffer. Few studies, however, have specifically examined adult social supports from the perspective of their developmental precursors and critical developmental periods. Some data indicate that the preadolescent period may be of particular importance to the development of adult social skills and ties. Observational and empirical studies of preadolescent peer relationships, and in particular best friendships, suggest unique and critical contributions to adult social relatedness. Present research is suggestive but is insufficient to validate preadolescence as a critical period in adult social relatedness. Our review has implications for better understanding the mechanisms by which preadolescent friendships effect adult social support—an important mediator of the effects of stress on health. Further longitudinal study is needed.Received Ph.D. from University of Maryland. Research interests are social supports and psychological responses to trauma and disaster.Received M.D. from Yale University. Research interests are social supports and traumatic stress.  相似文献   
115.
116.
117.
118.
A simple and rapid method is described for processing organ and water samples for the identification of diatoms so that they can be studied and recorded for taxonomic and diagnostic purposes. Samples are treated with concentrated nitric acid; the fluid obtained is centrifuged, and its sediment is dried, coated, and examined under the scanning electron microscope. The method does not alter the morphology of diatoms and allows the study of freshwater and seawater species present in the organs of bodies found in the water, making possible the diagnosis of drowning under specific conditions.  相似文献   
119.
苏联解体的原因与后果   总被引:3,自引:1,他引:2  
1991年12月8日俄罗斯领导人Б.Н.叶利钦、乌克兰领导人Л.М.克拉夫丘克和白俄罗斯领导人С.С.舒什克维奇签署了别洛韦日协议,导致了苏联的解体;苏联解体是20世纪世界史上最重大的历史事件之一,这大概是大多数历史学家和政治学家对此的一致评价,而其他所有有关苏联解体的原因、后果等问题则一直是激烈争论的对象。  相似文献   
120.
Observations of high velocity bloodspatter on adjacent objects   总被引:1,自引:0,他引:1  
In a recent homicide investigation, high velocity backspatter was observed on the sleeve cuff of the accused. These minute droplets were discovered only after microscopic examination and were limited in number. A study was initiated to determine if these were truly backspatter droplets or transferred blood produced from light contact with a bloody item. It was observed that the backspattered blood was primarily limited to contact or near contact shots. An exception was a shot into an already bloody surface. It was found that backspattered blood would deposit on the shooter's shirt sleeve irrespective of the weave pattern. Transferred blood was observed only on the fiber tops. This information was found to be useful in reconstruction of events in suicides as well as possible homicides.  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