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   1349篇
  免费   62篇
各国政治   134篇
工人农民   59篇
世界政治   131篇
外交国际关系   60篇
法律   606篇
中国共产党   1篇
中国政治   22篇
政治理论   390篇
综合类   8篇
  2023年   6篇
  2022年   6篇
  2021年   10篇
  2020年   22篇
  2019年   33篇
  2018年   31篇
  2017年   40篇
  2016年   44篇
  2015年   36篇
  2014年   45篇
  2013年   239篇
  2012年   34篇
  2011年   41篇
  2010年   35篇
  2009年   22篇
  2008年   40篇
  2007年   35篇
  2006年   55篇
  2005年   50篇
  2004年   43篇
  2003年   47篇
  2002年   49篇
  2001年   25篇
  2000年   26篇
  1999年   24篇
  1998年   27篇
  1997年   29篇
  1996年   20篇
  1995年   14篇
  1994年   21篇
  1993年   26篇
  1992年   9篇
  1991年   13篇
  1990年   11篇
  1989年   16篇
  1988年   22篇
  1987年   10篇
  1986年   15篇
  1985年   10篇
  1984年   17篇
  1983年   7篇
  1982年   11篇
  1981年   9篇
  1979年   18篇
  1978年   9篇
  1976年   8篇
  1975年   6篇
  1971年   5篇
  1968年   5篇
  1967年   6篇
排序方式: 共有1411条查询结果,搜索用时 15 毫秒
91.
Thirty Black women activists within different age categories, from varied educational and occupational backgrounds, and representing Black women's organizations from different regions of the U.S. were interviewed to determine their views on the meaning and effect of the UN Decade for Women on the lives of Black American women. Their responses to questions about the Decade indicate that the masses of Black women are poorly informed or totally uninformed about the UN Decade for Women. And, among that segment of the Black female population which is well informed about the Decade, positive views on the benefits of the Decade for Black women correlate strongly with employment in a national women's organization or governmental agency dealing with women's issues, and personal involvement in UN Conferences. Many Black women feel that the opportunity to network with third-world women is the major benefit that Black American women gained from the Decade. They also feel that American racism and class bias effectively prevent equitable implementation of a national plan of action to improve the status of women in the United States.  相似文献   
92.
93.
94.
95.
96.
97.
In the past three different paradigms or, more loosely, frames of reference, have been used by students of politics to interpret various dimensions of mass political participation. Each of these, which are referred to as the political socialization, the group interests and beliefs, and the political party/organization paradigms, has received empirical support for its scheme of interpretation; yet recent political events also suggest that these frames of reference may be inadequate, and may need to be complemented, if not replaced, by other schemes. The present paper outlines one such scheme, drawing upon recent writings on social networks and social influences on political participation. It relies on the metaphor of a political arena, and proposes two simple propositions to account both for conventional and unconventional participation in this arena.An earlier version of this paper was delivered at the Annual Meetings of the Society for the Study of Social Problems, New York, NY, August 1976.  相似文献   
98.
In the years following World War One the pastoral populations of northern Arabia were subjected to political pressures and economic hardships arising from the creation of French and British spheres of influence in the territories that would become the states of Jordan, Syria and Iraq, and by the aggressive expansion of the domains of the ruler of Najd, ‘Abd al-‘Aziz ibn ‘Abd al-Rahman Al Saud. Year by year the nascent states in the region asserted more control over the vast stretches of desert and steppe that had heretofore been the domains of powerful bedouin tribes and confederations. New borders often cut across tribal territories creating complications and conflict in such matters as sovereignty, citizenship, migration, raiding and political refuge. The establishment of new customs regimes and economic policies meant that age-old patterns of trade between the settled and nomadic populations were altered, curtailed or criminalized as ‘smuggling’.

This article examines two sets of policies that Iraqi and Saudi forces employed to express political domination in the desert and steppes of Kuwait and beyond in the guise of controlling trade: the Saudi blockade of overland trade with Kuwait; and Iraq's aggressive ‘anti-smuggling’ measures that often victimized innocent bedouin. In both cases, members of bedouin tribes were harassed, attacked, pillaged and forced to alter their normal patterns of trade and migration. The eventual rise and dominance of state power resulted in the historic defeat of bedouin control in the deserts and steppes and a gradual loss of their traditional economic options. This article provides detailed evidence showing how part of this large transformation in bedouin society took place.  相似文献   

99.
A 1H nuclear magnetic resonance (1H NMR) method for the determination of gamma-hydroxybutyric acid (GHB) and gamma-hydroxybutyrolactone (GBL) in human serum and urine using spiked samples has been developed. The method gives linear responses (correlation coefficients of 0.99 or greater) over the concentration range 0.01 mg/mL to 4.0 mg/mL in urine and 0.3 mg/mL to 2.0 mg/mL in serum. No sample pretreatment is required. Studies of the chemical interconversion of GBL and GHB showed hydrolysis of GBL to be rapid at pH 11.54, slower and less complete (30% hydrolysis) at pH 2.54 and slowest at pH 7.0, reaching 30% hydrolysis in about 40 days. No esterification of GHB was observed at any pH.  相似文献   
100.
Specimens from fatal aviation accident victims are submitted to the FAA Civil Aerospace Medical Institute for toxicological analysis. During toxicological evaluations, ethanol analysis is performed on all cases. Care must be taken when interpreting a positive ethanol result due to the potential for postmortem ethanol formation. Several indicators of postmortem ethanol formation exist; however, none are completely reliable. The consumption of ethanol has been shown to alter the concentration of two major serotonin metabolites, 5-hydroxytryptophol (5-HTOL) and 5-hydroxyindole-3-acetic acid (5-HIAA). While the 5-HTOL/5-HIAA ratio is normally very low, previous studies using living subjects have demonstrated that the urinary 5-HTOL/5-HIAA ratio is significantly elevated for 11-19 h after acute ethanol ingestion. Recently, our laboratory developed and validated an analytical method for the simultaneous determination of both 5-HTOL and 5-HIAA in forensic urine samples using a simple liquid/liquid extraction and LC/MS/MS and LC/MS/MS/MS. In this previous work a 15 pmol/nmol serotonin metabolite ratio cutoff was established in postmortem urine, below which it could be conclusively determined that no recent antemortem ethanol consumption had occurred. In the current study this newly validated analytical method was applied to five ethanol-positive aviation fatalities where the origin of the ethanol present could not previously be conclusively determined. In four of the five cases examined the detected ethanol was demonstrated to be present due to postmortem microbial formation, and not consumption, even though some indication of ethanol consumption may have been present.  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