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   16407篇
  免费   470篇
各国政治   711篇
工人农民   574篇
世界政治   1156篇
外交国际关系   514篇
法律   10051篇
中国政治   128篇
政治理论   3596篇
综合类   147篇
  2020年   169篇
  2019年   242篇
  2018年   323篇
  2017年   336篇
  2016年   335篇
  2015年   251篇
  2014年   283篇
  2013年   1610篇
  2012年   351篇
  2011年   419篇
  2010年   351篇
  2009年   397篇
  2008年   411篇
  2007年   404篇
  2006年   420篇
  2005年   375篇
  2004年   371篇
  2003年   379篇
  2002年   364篇
  2001年   587篇
  2000年   503篇
  1999年   426篇
  1998年   247篇
  1997年   199篇
  1996年   198篇
  1995年   197篇
  1994年   198篇
  1993年   204篇
  1992年   324篇
  1991年   372篇
  1990年   347篇
  1989年   366篇
  1988年   332篇
  1987年   348篇
  1986年   378篇
  1985年   372篇
  1984年   341篇
  1983年   331篇
  1982年   235篇
  1981年   211篇
  1980年   191篇
  1979年   235篇
  1978年   151篇
  1977年   159篇
  1976年   155篇
  1975年   125篇
  1974年   148篇
  1973年   138篇
  1972年   125篇
  1969年   114篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Comparison of a suspected biter's dental arches with the patterned injury of a bite mark is especially difficult when the bite occurs in an anatomic location with a small radius of curvature or with complex or compound curves. The authors present two case reports in which human skin was used as a template for the reproduction of a bite. In one case the victim's skin was used; in the other, the skin of a anatomically similar person was used. The use of inked dental casts, photography, and transparent overlays significantly reduced the errors common to analysis of bite marks in these highly curved areas.  相似文献   
63.
The population-adjusted rate of teenage suicide in King County, Washington, was reviewed for the 26 years from 1959 to 1984. For the entire period, the rate did not change significantly. An abrupt change did occur during the middle of this period, but, for reasons discussed in the text, this may well represent a change in procedures and philosophy of death certification rather than a real change in rate. Reasons for the apparent discrepancy with national statistics are discussed.  相似文献   
64.
65.
66.
In the statistical interpretation of forensic glass evidence it is standard practice to make the assumption of homogeneity of the refractive index (RI) of the source glass, or of localized homogeneity. However, the work of Locke and Hayes showed that, for toughened windscreen glass, this assumption might not be true. This work is well cited, but there appears to have been little follow-on published research. Furthermore, the toughening process is something known to affect the refractive index, and is a process that float glass does not undergo. Float glass is a major component of casework in New Zealand and for that reason it would be interesting to know whether the findings of Locke and Hayes apply when dealing with float glass. In this paper we describe an experiment similar to that of Locke and Hayes, systematically examining the variation of RI in a pane of float window glass. It was found that, although there were no systematic differences in refractive index, there were observable differences across the pane.  相似文献   
67.
68.
This article argues that, despite environmental issues climbing higher on the political agenda and considerable recent policy activity, rhetoric is not matched by reality in our efforts to manage the Australian environment. We integrate the imperatives emerging from the policy and sustainability literatures and from actual policy, with detailed work on wildlife conservation in Victoria's Central Highlands. Our analysis demonstrates that, rather than undertaking the more intensive policy and 'adaptive management' that is needed, governments are often doing less and may actually be 'taking their hands of their wheel'. Some public policy and administration implications of the emerging policy field of sustainability are illustrated.  相似文献   
69.
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   
70.
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   
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