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   74842篇
  免费   3012篇
各国政治   4549篇
工人农民   3048篇
世界政治   6427篇
外交国际关系   3887篇
法律   37126篇
中国共产党   11篇
中国政治   768篇
政治理论   21095篇
综合类   943篇
  2021年   417篇
  2020年   1183篇
  2019年   1536篇
  2018年   1781篇
  2017年   2070篇
  2016年   2262篇
  2015年   1858篇
  2014年   2120篇
  2013年   10582篇
  2012年   1792篇
  2011年   1931篇
  2010年   1919篇
  2009年   2141篇
  2008年   1916篇
  2007年   1935篇
  2006年   2116篇
  2005年   1981篇
  2004年   1863篇
  2003年   1638篇
  2002年   1717篇
  2001年   2053篇
  2000年   1759篇
  1999年   1528篇
  1998年   1196篇
  1997年   1035篇
  1996年   1017篇
  1995年   989篇
  1994年   992篇
  1993年   1009篇
  1992年   1156篇
  1991年   1187篇
  1990年   1130篇
  1989年   1120篇
  1988年   1125篇
  1987年   1115篇
  1986年   1159篇
  1985年   1184篇
  1984年   1070篇
  1983年   1075篇
  1982年   930篇
  1981年   873篇
  1980年   701篇
  1979年   803篇
  1978年   629篇
  1977年   561篇
  1976年   514篇
  1975年   452篇
  1974年   478篇
  1973年   463篇
  1972年   398篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
351.
352.
353.
354.
355.
356.
Ministerial reshuffles are complex exercises requiring careful handling. A frequent occurrence in British government, their significance is usually seen in political terms. Prime Ministers attach great importance to maximizing the political advantages to be gained from them. This factor is the chief determinant of their logistics, the principal characteristics of which are secrecy in advance and the speed with which ministerial changes are executed. These features - as much as the frequency of ministerial changes per se - may disrupt the policy process and have serious implications for minister-civil servant power relations. Such problems could be alleviated by giving ministers advance notice of changes of post. The institution of a process of ministerial handovers would strengthen the position of incoming ministers by making them less dependent on their officials, upon whom they rely heavily for initial briefing at present.  相似文献   
357.
Report of an unusual finding of bones on the shore of the Baltic Sea. Although the morphological findings appeared similar to a human foot skeleton, a quick identification as sea dog bone was possible.  相似文献   
358.
In many countries it is left to the discretion of the court to accept or reject conclusions based on sampling procedures as applied to the total drug exhibit. As an alternative to this subjective approach, a statistical basis is presented using binomial and hypergeometric distributions to determine a lower limit for the proportion of units in a population which contains a drug, at a given confidence level. A method for calculating the total weight of a drug present in a population within a given confidence interval is also presented. In the event of no failures (all units sampled contain a drug), a sample size of six or seven units is generally sufficient to state that a proportion of at least 0.70 of the population contains a drug at a confidence level of at least 90%. When failures do occur in the sample, point estimation is used as the basis for selecting the appropriate sample size.  相似文献   
359.
During the past decade the field of psychology of law has changed considerably. Accompanying the growth of research and practice, there has been an increase in offerings of courses in this field. The courses are offered at both undergraduate and graduate levels and cover a wide spectrum of interests. The types of courses currently being offered and the student samples enrolling in the courses are examined. In addition, a review of the major textbooks used in the courses is provided.  相似文献   
360.
A case of the sudden death of a 14-month-old girl due to massive hemorrhage in a primitive neuroectodermal tumor (PNET) is presented along with a review of the relevant literature. PNET is a rare, malignant brain neoplasm occurring predominantly in children.  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