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   627篇
  免费   26篇
各国政治   42篇
工人农民   76篇
世界政治   40篇
外交国际关系   47篇
法律   265篇
中国政治   13篇
政治理论   168篇
综合类   2篇
  2023年   6篇
  2022年   2篇
  2021年   5篇
  2020年   12篇
  2019年   19篇
  2018年   29篇
  2017年   32篇
  2016年   25篇
  2015年   21篇
  2014年   20篇
  2013年   80篇
  2012年   12篇
  2011年   23篇
  2010年   24篇
  2009年   14篇
  2008年   17篇
  2007年   29篇
  2006年   31篇
  2005年   13篇
  2004年   9篇
  2003年   17篇
  2002年   23篇
  2001年   12篇
  2000年   10篇
  1999年   8篇
  1998年   8篇
  1997年   8篇
  1996年   12篇
  1995年   15篇
  1994年   8篇
  1993年   4篇
  1992年   9篇
  1991年   7篇
  1990年   2篇
  1989年   9篇
  1988年   11篇
  1987年   6篇
  1986年   7篇
  1985年   10篇
  1984年   3篇
  1983年   5篇
  1982年   5篇
  1981年   7篇
  1980年   2篇
  1979年   2篇
  1978年   3篇
  1977年   4篇
  1975年   2篇
  1974年   4篇
  1943年   1篇
排序方式: 共有653条查询结果,搜索用时 31 毫秒
61.
The effectiveness of campaign spending is a hotly contested issue. Much of that debate concentrates upon predetermined or assumed campaign periods. Yet, in a party and electoral system such as Britain, parties are continually campaigning. Party expenditure may therefore have a constant and cumulative effect. This article examines whether increased party spending at the national level is electorally significant. It analyses annual data from 1959 to 1994 and concludes that there is insufficient consistent evidence wholly to support this proposition.  相似文献   
62.
In the present study a two-part animism questionnaire was devised and administered to 200 female undergraduate students who had fairly extensive course backgrounds in science. When these students were asked to classify each of 15 objects as living or nonliving, 67% (N=134) gave evidence of apparent animistic thought. Yet when the subjects were asked to choose which of several statements reflected their own definition of living, 66% (N=132) claimed that only plants and animals are living. Scientific background did not relate to performance on either section of the questionnaire. Results indicate that although the primary orientation of many young adults toward the word living is not a biological one, most college students areable to classify stimuli according to this criterion.Received her Ph.D. in lifespan developmental psychology from West Virginia University in 1971. Primary research interest is cognitive functioning after childhood.  相似文献   
63.
64.
Childhood obesity is in important respects a result of legal policies that influence both dietary intake and physical activity. The law must shift focus away from individual risk factors alone and seek instead to promote situational and environmental influences that create an atmosphere conducive to health. To attain this goal, advocates should embrace a population-wide model of public health, and policymakers must critically examine the fashionable rhetoric of consumer choice.  相似文献   
65.
No consensus yet exists on how to handle incidental findings (IFs) in human subjects research. Yet empirical studies document IFs in a wide range of research studies, where IFs are findings beyond the aims of the study that are of potential health or reproductive importance to the individual research participant. This paper reports recommendations of a two-year project group funded by NIH to study how to manage IFs in genetic and genomic research, as well as imaging research. We conclude that researchers have an obligation to address the possibility of discovering IFs in their protocol and communications with the IRB, and in their consent forms and communications with research participants. Researchers should establish a pathway for handling IFs and communicate that to the IRB and research participants. We recommend a pathway and categorize IFs into those that must be disclosed to research participants, those that may be disclosed, and those that should not be disclosed.  相似文献   
66.
67.
Courts resolving child support cases involving separated, divorced, and non‐marital children are charged with defining responsibility for health care coverage for the children under that order. This article explores historical and current medical child support requirements under Title IV‐D of the Social Security Act—the national child support enforcement (“IV‐D”) program. It analyzes legal requirements and policy recommendations, and provides a practical tool judges may use to determine whether health care coverage available to either or both parents is appropriate—that is, comprehensive, accessible, and affordable.  相似文献   
68.
The principles that behavior is strongly influenced by the behavior of friends, and that people select each other to be friends on the basis of common characteristics, are based in large part on the many studies of adolescents that found the behavior of friends to be similar. In most of these studies, subjects were asked to describe, the behavior of their friends, and this information was then related to subjects' reports of their own behavior. The research on adolescent smoking and drinking described in this paper departs from that tradition by including friend reports of friend behavior so that results based on the different sources for measuring friend behavior can be compared. Subject report of friend behavior is a stronger correlate, of adolescent behavior than friend report of friend behavior, but the two sources for measuring friend behavior produce the same correlations with subject behavior when using longitudinal designs and controlling for prior subject behavior. The findings are discussed in the context of theoretical and methodological considerations of peer influence and selection.This research was supported by grants from the National Institute on Alcohol Abuse and Alcoholism (AA04099) and the National Institute on Drug Abuse (DA02480) of the U.S. Department of Health and Human Services.Received his Ph.D. from Florida State University. His research interests include adolescent health and evaluation research.Received her M.A. from University of North Carolina at Chapel Hill. Her research interests include methodology and analyses in behavioral sciences and applied social and developmental psychology.  相似文献   
69.
70.
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