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   426篇
  免费   12篇
各国政治   28篇
工人农民   62篇
世界政治   35篇
外交国际关系   20篇
法律   214篇
中国政治   3篇
政治理论   73篇
综合类   3篇
  2023年   3篇
  2022年   3篇
  2021年   4篇
  2020年   18篇
  2019年   14篇
  2018年   18篇
  2017年   21篇
  2016年   14篇
  2015年   16篇
  2014年   16篇
  2013年   69篇
  2012年   16篇
  2011年   11篇
  2010年   10篇
  2009年   20篇
  2008年   16篇
  2007年   13篇
  2006年   14篇
  2005年   13篇
  2004年   12篇
  2003年   11篇
  2002年   12篇
  2001年   9篇
  2000年   5篇
  1999年   1篇
  1998年   1篇
  1997年   5篇
  1995年   5篇
  1994年   6篇
  1993年   6篇
  1992年   4篇
  1991年   4篇
  1990年   3篇
  1989年   2篇
  1987年   3篇
  1986年   4篇
  1985年   1篇
  1984年   6篇
  1982年   6篇
  1981年   2篇
  1979年   5篇
  1977年   7篇
  1976年   2篇
  1975年   2篇
  1974年   1篇
  1973年   2篇
  1971年   1篇
  1967年   1篇
排序方式: 共有438条查询结果,搜索用时 15 毫秒
21.
As a best-selling writer of popular romances during the first half of the twentieth century, Berta Ruck (1878-1978) has been characterised as a producer of 'omelettes of frivolity and sweetness' whose appeal was confined to adolescent girls and the servant classes. Closer attention to some of the early novels and to her own evaluation of her work, however, reveals her attempts to confront and articulate the impact of societal change upon a generation whose world was being irrevocably altered by the Great War and its aftermath. Her almost forensic attention to local detail and her treatment of contemporary questions of gender identity make her a compelling chronicler of the period and lend credibility to her claims of a broader readership than that generally associated with the genre.  相似文献   
22.
We know relatively little about the economic effects of “insignificant” rules because they are not typically analyzed. Yet, these rules could be cumulatively important. We provide an economic analysis of one proposed rule to control hazardous air pollutants, which is not considered to be economically significant. This rule is of particular interest because it is one of the first in a long series of rules that Environmental Protection Agency (EPA) will consider for limiting hazardous air pollutant emissions. Our analysis suggests that the proposed controls that EPA has considered are not likely to pass a benefit–cost test. We recommend that an agency base its decision to allocate additional resources to benefit–cost analysis on the expected value of the improved information. In addition, agencies should consider applying a rule of thumb that would specify a threshold level of risk reduction that needs to be achieved before some kinds of regulation are considered.  相似文献   
23.
24.
He writes regularly on matters of strategy. His publications include The Strategic Dimension of Military Manpower;and Paradoxes of Power: The Military Establishment in the Eighties.  相似文献   
25.
26.
27.
Foster  Lorn S. 《Publius》1986,16(4):17-28
Section 5 of the Voting Rights Act is an administrative remedythat has not been fully enforced to protect the voting rightsof minority citizens in those jurisdictions covered by the VRA.Failure to enforce Section 5 fully is the result of: (I) thestructure of the Section 5 review process, (2) the poor qualityof data received by the U.S. Department of Justice, and (3)the cursory analysis of data by the Equal Opportunity Specialists.What is needed to strengthen Section 5 enforcement is a strongpresidential commitment to protect the interests of minorityvoters. Reform of the Section 5 review process can only takeplace if the president places voting rights enforcement highon his political agenda.  相似文献   
28.
29.
In a double-blind placebo controlled study on psychomotor skills important for car driving (Study 1), a 75 mg dose of +/- 3,4-methylenedioxymethamphetamine (MDMA) was administered orally to 12 healthy volunteers who were known to be recreational MDMA-users. Toxicokinetic data were gathered by analysis of blood, urine, oral fluid and sweat wipes collected during the first 5h after administration. Resultant plasma concentrations varied from 21 to 295 ng/ml, with an average peak concentration of 178 ng/ml observed between 2 and 4h after administration. MDA concentrations never exceeded 20 ng/ml. Corresponding MDMA concentrations in oral fluid, as measured with a specific LC-MS/MS method (which required only 50 microl of oral fluid), generally exceeded those in plasma and peaked at an average concentration of 1215 ng/ml. A substantial intra- and inter-subject variability was observed with this matrix, and values ranged from 50 to 6982 ng/ml MDMA. Somewhat surprisingly, even 4-5h after ingestion, the MDMA levels in sweat only averaged 25 ng/wipe. In addition to this controlled study, data were collected from 19 MDMA-users who participated in a driving simulator study (Study 2), comparing sober non-drug conditions with MDMA-only and multiple drug use conditions. In this particular study, urine samples were used for general drug screening and oral fluid was collected as an alternative to blood sampling. Analysis of oral fluid samples by LC-MS/MS revealed an average MDMA/MDEA concentration of 1121 ng/ml in the MDMA-only condition, with large inter-subject variability. This was also the case in the multiple drug condition, where generally, significantly higher concentrations of MDMA, MDEA and/or amphetamine were detected in the oral fluid samples. Urine screening revealed the presence of combinations such as MDMA, MDEA, amph, cannabis, cocaine, LSD and psilocine in the multiple-drug condition.  相似文献   
30.
Ego identity status and decision styles   总被引:1,自引:0,他引:1  
It was hypothesized that the decision processes used in coping with the identity crisis would be related to more general decision styles in that identity achievers and moratoriums would tend to be reflective in their conceptual tempo while foreclosures would typically be impulsive. No prediction was made about identity diffusions. Ninety-two male college students were given an identity status interview and the Matching Familiar Figures Test. The results were consistent with the hypotheses, and in addition it was found that identity diffusions were generally impulsive. Since conceptual tempo has been found to be well established in childhood, the results of this study have implications for the early prediction of adult identity status.Received Ph.D. from SUNY/Buffalo. Recent research has been mainly concerned with the development of ego identity and correlates of the different identity statuses.Received Ph.D. from SUNY/Buffalo. Recent research has been mainly concerned with the development of ego identity and correlates of the different identity statuses.  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