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   896篇
  免费   37篇
各国政治   40篇
工人农民   70篇
世界政治   54篇
外交国际关系   52篇
法律   450篇
中国政治   7篇
政治理论   243篇
综合类   17篇
  2021年   7篇
  2020年   14篇
  2019年   20篇
  2018年   31篇
  2017年   40篇
  2016年   37篇
  2015年   24篇
  2014年   37篇
  2013年   150篇
  2012年   25篇
  2011年   30篇
  2010年   18篇
  2009年   15篇
  2008年   29篇
  2007年   37篇
  2006年   28篇
  2005年   23篇
  2004年   30篇
  2003年   24篇
  2002年   20篇
  2001年   13篇
  2000年   20篇
  1999年   13篇
  1998年   8篇
  1997年   12篇
  1996年   10篇
  1995年   12篇
  1994年   10篇
  1993年   10篇
  1992年   6篇
  1991年   14篇
  1990年   9篇
  1989年   12篇
  1988年   11篇
  1987年   4篇
  1986年   8篇
  1985年   10篇
  1984年   11篇
  1983年   9篇
  1982年   9篇
  1981年   12篇
  1980年   11篇
  1979年   9篇
  1978年   5篇
  1977年   8篇
  1976年   7篇
  1973年   4篇
  1972年   3篇
  1971年   3篇
  1970年   3篇
排序方式: 共有933条查询结果,搜索用时 15 毫秒
151.
In this interview Harry Howe Ransom, a leading American scholar of intelligence studies over the past 50 years, discusses how he entered the field and his views regarding some key intelligence topics. Foremost on his research agenda has been the study of whether in democratic societies secret agencies can operate side-by-side with an otherwise open government without violating basic civil liberties – the difficult balancing act between the need for security, on the one hand, and the cherished value of liberty, on the other. He has also been a leading critic of intelligence politicization, noting in this interview that there is a tendency for intelligence systems to provide information they think their top bosses want to hear, and for the top bosses – more often than not – to do what they wish in spite of intelligence to the contrary. Professor Ransom began his research into intelligence as a young political scientist at Harvard University and continued this work throughout his subsequent distinguished career at Vanderbilt University and into his retirement years.  相似文献   
152.
153.
154.
155.
From 1954 to 1958, the Greek government sought to raise the issue of self‐determination for Cyprus at the United Nations as a means of pressing for the union of the island with the Greek state ‐ enosis. The British government's objective was to ensure if possible that Cyprus was not debated using the legal argument that it was a domestic issue in which the UN had no rights. The British accepted, however, that other political and strategic arguments would be needed to defeat the Greeks and looked to the US government to support them in the UN forums. This article examines the positions of the British and Americans governments and shows the difficulties which the issue created for both in the UN in the period.  相似文献   
156.
157.
158.
We examined the utility of CT scans in the evaluation of degree of ectocranial suture closure. Five cranial points (left and right midcoronal positions, left and right midlambdoidal positions, and the lambda) were evaluated in 231 CT scans using a three‐point scoring system (open, partial closed, and closed). The slice increment and thickness varied between three groups of the scans. The results showed a good correlation between degree of suture closure and increasing age in each group. Young individuals (<40 years) and old individuals (>60 years) could be clearly distinguished from the middle‐aged individuals. ANOVA test revealed no difference between two groups of scans and between left and right sides (> 0.05). Interobserver agreement was good, especially considering the score by sides. The results of this study create the base for developing a robust and simple method to estimate the age at death using CT scans.  相似文献   
159.
160.
Abstract: In developing latent prints on cartridge casings and shotgun shells, multiple chemical processes should be used in order to obtain the best results. In Phase I, this study established an optimal chemical sequence for both Brass and Nickel cartridge casings based on six sequences involving four chemicals: Cyanoacrylate, Black Powder, Rhodamine 6G and Acidified Hydrogen Peroxide. Phase II was a validation study of Phase I involving a random sample of both Brass and Nickel cartridge casings, which were processed according to the determined optimal sequences. In addition, ribbed shotgun shells were processed under Phase I results and determined to be dependent upon the utilization of a CrimeScope at 515 nm. Consideration should be given to the type of cartridge case being examined. Although limitations exist, some chemical sequences undeniably work better than others. All photographs were manipulated with Adobe® Photoshop®. All results were verified by a senior latent print examiner.  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