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   495篇
  免费   44篇
各国政治   11篇
工人农民   47篇
世界政治   25篇
外交国际关系   30篇
法律   297篇
中国政治   6篇
政治理论   118篇
综合类   5篇
  2023年   4篇
  2021年   5篇
  2020年   16篇
  2019年   24篇
  2018年   26篇
  2017年   35篇
  2016年   29篇
  2015年   25篇
  2014年   21篇
  2013年   73篇
  2012年   19篇
  2011年   16篇
  2010年   15篇
  2009年   19篇
  2008年   11篇
  2007年   18篇
  2006年   16篇
  2005年   7篇
  2004年   7篇
  2003年   9篇
  2002年   8篇
  2001年   9篇
  2000年   8篇
  1999年   8篇
  1998年   8篇
  1997年   7篇
  1996年   8篇
  1995年   4篇
  1994年   5篇
  1993年   5篇
  1992年   6篇
  1991年   2篇
  1990年   3篇
  1988年   6篇
  1987年   2篇
  1986年   3篇
  1983年   4篇
  1982年   2篇
  1981年   4篇
  1980年   6篇
  1979年   17篇
  1978年   1篇
  1977年   2篇
  1976年   3篇
  1973年   1篇
  1972年   1篇
  1971年   1篇
  1969年   2篇
  1967年   4篇
  1966年   1篇
排序方式: 共有539条查询结果,搜索用时 15 毫秒
131.
Global population-level patterns in female participation in contemporary political and revolutionary conflict remain largely unknown as systematic empirical research in the area is lacking. Accordingly, this study systematically documented the participation of a comprehensive sample of women involved in conflict around the world. A statistically derived model of female participation is proposed that consists of four thematic roles representing specific patterns of activity: active, representing fighting and leadership activities; caring, representing traditional feminine tasks; support, representing logistically based tasks, and; ideological, representing activities that propagate the ideology of the group. The contribution of the model to theory, research, and practice is considered.  相似文献   
132.
133.
134.
135.
It is perfectly obvious that in any decent occupation…there are only two ways…of succeeding. One is by doing very good work, the other is by cheating.  相似文献   
136.
This paper evaluates the two most common methods of measuring voter time-of-decision??the recall method and the panel method??and asks whether the two methods are consistent with each other. Using data from the National Annenberg Election Survey collected during the 2008 U.S. presidential election, the findings suggest that these two methods measure different concepts, and thus cannot be used interchangeably. Furthermore, discrepancies between the two methods suggest that the accepted model of early, campaign, and late decision-making should be adjusted to account for a fourth group of voters that never changes their vote intention, but does not truly commit to that intention until later in the campaign. The concept of uncommitted early deciders is offered to describe this group, created by combining the two methods.  相似文献   
137.
Older adults are at elevated risk of reducing labor supply due to poor health, partly because of high rates of symptoms that may be alleviated by medical marijuana. Yet, surprisingly little is known about how this group responds to medical marijuana laws (MMLs). We quantify the effects of state medical marijuana laws on the health and labor supply of adults age 51 and older, focusing on the 55 percent with one or more medical conditions with symptoms that may respond to medical marijuana. We use longitudinal data from the Health and Retirement Study to estimate event study and differences‐in‐differences regression models. Three principle findings emerge from our analysis. First, active state medical marijuana laws lead to lower pain and better self‐assessed health among older adults. Second, state medical marijuana laws lead to increases in older adult labor supply, with effects concentrated on the intensive margin. Third, the effects of MMLs are largest among older adults with a health condition that would qualify for legal medical marijuana use under current state laws. Findings highlight the role of health policy in supporting work among older adults and the importance of including older adults in assessments of state medical marijuana laws.  相似文献   
138.
Mental health professionals are being retained with increasing frequency as “custody consultants” to prepare a parent for a child custody evaluation. While this practice may serve a legitimate function, no ethical guidelines clearly govern the conduct of a consultant in such circumstances. This lack of guidance has led to professional disagreement regarding the ethical implications of the practice. This ethical ambiguity is accompanied by social concern regarding the high cost of custody consulting, which has the practical effect of denying consulting services to low‐income or self‐represented litigants. This Note will describe the growing practice of custody consulting and the ethical and social unease currently associated with the practice. This Note will then propose that mandatory parent education programs be developed for parents preparing to undergo a custody evaluation. This type of educational program would provide many of the benefits of custody consulting in an ethically neutral fashion and would ensure that all parents have access to the benefits of this growing practice.  相似文献   
139.
140.
Personal identification is based on the comparison between ante mortem and post mortem data which can be considered unique for each individual: palatal rugae represent a useful element for such a comparison, thanks to their apparent low variability with time and unique patterns. Literature however is scarce.This pilot study aims at assessing the reliability of palatal rugae in time and at developing an identification method based on their comparison. Two casts from the upper dental arch of 39 subjects were obtained in different periods of time; at their first cast, 85.2% of patients were less than 16 years old. The second cast was performed after a period of time which varied between 4 and 65 months later than the first cast. The first cast can be taken to simulate ante mortem information, the second post mortem information. Every cast was then digitised with a scanner. In the digital images the palatal rugae were highlighted by using Adobe® Photoshop® 7.0 software; each image was coded and a comparison between “simulated” ante mortem and post mortem data was performed. In all cases ante mortem and post mortem data from the same individual were correctly matched.The study seems to indicate that this technique is highly reliable and user friendly, even on subadults, where growth processes seem not to affect the specific morphology of palatal rugae.  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