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   2528篇
  免费   70篇
各国政治   82篇
工人农民   205篇
世界政治   99篇
外交国际关系   95篇
法律   1659篇
中国政治   15篇
政治理论   434篇
综合类   9篇
  2021年   17篇
  2020年   17篇
  2019年   27篇
  2018年   122篇
  2017年   63篇
  2016年   135篇
  2015年   58篇
  2014年   44篇
  2013年   190篇
  2012年   159篇
  2011年   126篇
  2010年   41篇
  2009年   61篇
  2008年   51篇
  2007年   55篇
  2006年   63篇
  2005年   420篇
  2004年   127篇
  2003年   60篇
  2002年   36篇
  2001年   34篇
  2000年   23篇
  1999年   29篇
  1998年   13篇
  1997年   15篇
  1996年   14篇
  1994年   9篇
  1992年   32篇
  1991年   35篇
  1990年   44篇
  1989年   50篇
  1988年   35篇
  1987年   31篇
  1986年   40篇
  1985年   36篇
  1984年   20篇
  1983年   23篇
  1982年   13篇
  1980年   11篇
  1979年   14篇
  1978年   12篇
  1975年   15篇
  1974年   28篇
  1973年   17篇
  1972年   17篇
  1971年   20篇
  1970年   14篇
  1968年   12篇
  1967年   9篇
  1965年   8篇
排序方式: 共有2598条查询结果,搜索用时 15 毫秒
921.
国际反毒专家预测 :苯丙胺类毒品将是二十一世纪全世界范围内滥用最为广泛的毒品。福建省苯丙胺类毒品犯罪的特点 :1、呈现区域化特征 ;2、境内外毒贩勾结 ,团伙犯罪突出 ;3、摇头丸走私入境 ,出现了摇头丸的制造。呈上升趋势的原因 ;1、国际非法市场需求量增加 ;2、地理位置、人文因素 ;3、禁毒经费紧缺 ,力量薄弱 ;4、破案方法简单。  相似文献   
922.
Partial absence and fatty replacement of the myocardial compacta of the right ventricular wall was observed in five young male adults, four of whom died suddenly and unexpectedly and one in a car accident. In one of these cases there was only one coronary orifice. Four cases of the so-called Uhl anomaly had histological findings indicating dysmorphic myocardial cells associated with minimal lymphohistiocytic infiltrates within the fatty tissue. In one case, chronic destructive inflammation was a prominent feature. Marked dysmorphic alterations in the myocardial fibers suggested the occurrence of arrhythmic episodes as the main cause of sudden heart failure and death.  相似文献   
923.
This article addresses the post-Cold War security and defence discourse in Norway, focusing on the impact of the transformation of NATO, an increasingly ambitious EU within security matters and the transatlantic tensions in the War on Terror. The article argues that changes or continuity in policy result from the discursive battle between various power constellations, which are forcing conflicting understandings of reality on each other. In this battle, the dominant representation frames NATO's transformation as a precondition for national defence with reference to alliance solidarity, loyalty and interoperability. The alternative representation, on the other hand, has framed NATO's transformation as negative for national defence, claiming that forces trained for global, warlike missions are neither capable nor available for national defence tasks such as containment of Russia's strategic interests in the Barents Sea. The EU has been brought into the security and defence discourse only when new integration steps, such as the European security and defence policy and EU Battle Groups, put the question of how far Norway may participate, to a test. However, developments like the slow withering away of NATO and unilateralist US foreign policy on Iraq are contributing to pushing the Norwegian discourse, and hence policy, closer to Europe.  相似文献   
924.
This article considers whether English law should allow a director to argue that if the company is unable to exploit a corporate opportunity, the director should be free to exploit it personally. The article supports the view of the Company Law Review Steering Group that the answer should remain no. In so doing it analyses US practice to show that, even where such arguments are recognised, they are difficult to prove and their potential application is curtailed through the development of satellite rules. Indeed, in practical terms there may be no significant difference between the Steering Group's recommendations and the position towards which US law appears to be moving.  相似文献   
925.
926.
Optimal conditions of metronidazole extraction from aqueous solutions by different solvents using a mathematical method of experiment planning (latin square) were studied. It was stated that optimal conditions of metronidazole extraction from aqueous solutions were: extraction time (5 min.), pH medium-6, extractant-isoamyl spirit in saturation of aqueous phase with ammonium sulfate.  相似文献   
927.
928.
Legal context: The standard term of a US utility patent is twenty years fromits filing date, but the term may be extended for various reasons.The statutory Patent Term Adjustment (PTA) scheme automaticallyextends the term of a patent by the number of days of delayin prosecution attributable to the United States Patent andTrademark Office (USPTO), minus the number of days of delayattributable to the applicant. By avoiding actions or inactionsthat result in delay, a US patent applicant may maximize theterm of the resulting patent. This article is intended particularlyfor practitioners outside the US who are instructing a US practitioner. Key points: Delay by the applicant chiefly results when more than threemonths elapses from the mailing of a USPTO action or requirementto receipt of the applicant's response or when a paper is filedat an inappropriate time. Such delays may be avoided or minimizedby promptly sending instructions and required documents to theUS patent attorney or agent in charge of the case. Time spentin an ultimately successful appeal of a final rejection willincrease PTA. Errors in PTA calculations by the USPTO may becorrected upon filing a request. Practical significance: PTA can be a potent source of extended US patent term, especiallywhen the applicant takes care not to introduce delay into theexamination process.  相似文献   
929.
This study assesses the association between adult attachment styles, religiosity, and courtship violence as experienced by females. The sample was composed of 299, 18 to 24-year-old females attending junior level Human Development and Family Studies courses at a midwestern state university. Statistical analyses evaluated interactional effects and mean-level differences for both victimization and perpetration of courtship violence. Additionally, structural equation models were generated. Results indicate significant relationships between adult attachment styles and religiosity on reports of victimization from intimate partners. In general, the results suggest that females with low religiosity and insecure attachment styles report experiencing more courtship violence than females reporting high religiosity and secure attachment styles. The analyses also provide support for a multidimensional conceptualization of religiosity. Indicators of `relationship' religiosity were more strongly linked to lower reports of courtship violence than personal and private relationship measures. The findings suggest that future studies evaluating the effects of religiosity on courtship violence should include measures of `relationship’ religiosity.  相似文献   
930.
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