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   2155篇
  免费   64篇
各国政治   169篇
工人农民   108篇
世界政治   127篇
外交国际关系   91篇
法律   1385篇
中国政治   23篇
政治理论   300篇
综合类   16篇
  2023年   12篇
  2022年   13篇
  2020年   47篇
  2019年   42篇
  2018年   67篇
  2017年   86篇
  2016年   82篇
  2015年   39篇
  2014年   50篇
  2013年   252篇
  2012年   60篇
  2011年   71篇
  2010年   55篇
  2009年   57篇
  2008年   65篇
  2007年   61篇
  2006年   57篇
  2005年   63篇
  2004年   61篇
  2003年   66篇
  2002年   46篇
  2001年   73篇
  2000年   53篇
  1999年   50篇
  1998年   20篇
  1997年   19篇
  1996年   21篇
  1995年   12篇
  1994年   19篇
  1993年   21篇
  1992年   32篇
  1991年   36篇
  1990年   39篇
  1989年   42篇
  1988年   36篇
  1987年   27篇
  1986年   38篇
  1985年   28篇
  1984年   21篇
  1983年   18篇
  1982年   12篇
  1981年   18篇
  1980年   12篇
  1979年   19篇
  1978年   21篇
  1977年   18篇
  1971年   18篇
  1970年   17篇
  1968年   19篇
  1967年   12篇
排序方式: 共有2219条查询结果,搜索用时 15 毫秒
991.
992.
Contemporary music is a category of cultural capital that is employed by symphonies and opera especially inefficiently. Considering its quantity, presumed relevance to social needs, and programming, this is surprising. The authors present a model of the programming decision for an ensemble that indicates that increasing the use of contemporary music's capital stock (i.e., increasing on-stage performances of contemporary music and thus listeners' exposure to and appreciation of it) is more difficult than in other artistic fields. Since redirecting audience attention to this cultural endowment will require retiring many resources from common use, standard recommendations for subsidies should be reassessed.  相似文献   
993.
994.

Constitution? Wetin be that? Me a never see constitution before o. Na wetin e bi? Na book or na food? Abi na di name of one new govnor? My broda, a beg make you talk the one wey poor man pikin fit sabi. But on a serious note, who are these chaps in the PRC (Provisional Ruling Council)? When did they get the mandate of the Nigerian people to give us a constitution? That will not be said to be the constitution of the Nigerian people … … it is a political mistake to call the document they are handing over a constitution. This is because, it has nothing to do with the will of the people of Nigeria. It was done based on the way the military wants it, it is only a guideline and therefore the civilians should regard it as a guideline.  相似文献   
995.
This article critiques and expands upon the jurisprudence of law’s violence from feminist and lesbian/gay/queer perspectives. The incorporation of gender and sexuality into the jurisprudence of law’s violence, via the social experiences of women and gay men, highlights the masculine and heteronormative character of law’s violence, while bringing into view particular forms of law’s violence, and forms of extra-legal but thoroughly legitimate heterosexual male violence, that have remained invisible in previous accounts. A feminist analysis of violence also suggests that law’s regime of violence is neither totalising nor inevitable, and that possibilities for resistance, if not avoidance, do exist.  相似文献   
996.
Analyzes the relief of the hard palate mucosa, depending on the shape of osseous base. Presents data on the prevalence of various morphological shapes of lateral folds in the hard palate mucosa and the levels of their disposition in the ipsiloid, ellipsoid, and parabolic osseous base of the hard palate. Demonstrates the possibility of using the characteristics of the hard palatal mucosa relief as an extra test for personality identification by the oral status.  相似文献   
997.
998.
999.
1000.
Latent fingerprints were successfully visualized using fluorescence lifetime imaging (FLIM) on paper which emits strong fluorescence with a lifetime close to that of fingerprints and thus from which it is difficult for time-resolved spectroscopy to visualize fingerprints. Latent fingerprint samples on paper were excited using a 450 nm or 532 nm nanosecond pulsed-laser, and time-resolved fluorescence images were obtained at a delay time of 6–16 ns in intervals of 1 ns, to the excitation pulse. The excitation beam was expanded using a lens, and the fluorescence from the fingerprints was captured using an intensified CCD camera. Because of the large fluorescence intensity of the background paper of approximately two to four orders of magnitude larger than that of the fingerprint, the fingerprint was not visualized on each fluorescence image by time-resolved spectroscopy. However, the fingerprint was visualized in a FLIM image constructed using a series of the fluorescence images for the case with the fluorescence intensity of the background paper being four orders of magnitude larger than that of the fingerprint. The difference in fluorescence lifetime in the FLIM image of the visualized fingerprint and background paper was in the order of 0.1 ns, which was an order of magnitude smaller than the inherent fluorescence lifetime of a few nanoseconds for the fingerprints and paper. It was demonstrated that, at a background fluorescence intensity with a certain order of magnitude larger than that of fingerprints, FLIM has the potential to visualize latent fingerprints which cannot be visualized by time-resolved spectroscopy.  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