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   665篇
  免费   23篇
各国政治   27篇
工人农民   69篇
世界政治   37篇
外交国际关系   34篇
法律   389篇
中国政治   5篇
政治理论   124篇
综合类   3篇
  2023年   3篇
  2022年   3篇
  2021年   13篇
  2020年   11篇
  2019年   17篇
  2018年   23篇
  2017年   21篇
  2016年   24篇
  2015年   24篇
  2014年   20篇
  2013年   75篇
  2012年   20篇
  2011年   17篇
  2010年   23篇
  2009年   27篇
  2008年   23篇
  2007年   19篇
  2006年   14篇
  2005年   17篇
  2004年   22篇
  2003年   24篇
  2002年   13篇
  2001年   11篇
  2000年   22篇
  1999年   9篇
  1998年   11篇
  1997年   12篇
  1996年   6篇
  1995年   7篇
  1994年   4篇
  1993年   3篇
  1992年   3篇
  1991年   4篇
  1990年   5篇
  1989年   7篇
  1988年   4篇
  1987年   6篇
  1986年   5篇
  1985年   38篇
  1984年   28篇
  1983年   24篇
  1982年   4篇
  1981年   3篇
  1980年   6篇
  1977年   2篇
  1976年   2篇
  1974年   2篇
  1968年   1篇
  1966年   2篇
  1964年   1篇
排序方式: 共有688条查询结果,搜索用时 62 毫秒
61.
62.
63.
64.
Why does the federal government provide aid for small business? This article contends that American core values are one of the sources of small business aid. Rather than taking the values/policy congruence approach of the national values school, it demonstrates a mechanism through which core values have influenced small business aid and through which core values likely influence other policies. The focus is on the processes of policy problem definition. While a role for core values in problem definition processes has been noted previously, core values have neither been a center of attention, nor have the various paths of values influence been linked. Analysis of the problems defined in the legislative histories of 39 systemically selected small business aid enactments, 1953–1993, shows avenues of values influence that have been under-appreciated or not appreciated at all.  相似文献   
65.
本文描述了用于规范法庭科学证言的英美证据法,这些法庭科学证言主要是解释微量物证之匹配的重要性。本文根据即将出版的维基百科全书法庭科学卷部分改编。  相似文献   
66.
We weigh the presumed benefits of routinely searching all research scans for incidental findings (IFs) against its substantial risks, including false-positive and false-negative findings, and the possibility of triggering unnecessary, costly evaluations and perhaps harmful treatments. We argue that routinely searching for IFs may not maximize benefits and minimize risks to participants.  相似文献   
67.
A meta-analysis investigating the relationship between marital satisfaction/discord and intimate partner violence (IPV) in heterosexual relationships was conducted with 32 articles. Overall, a small-to-moderate effect size (r = −0.27) indicated a significant and negative relationship existed between marital satisfaction/discord and IPV. Moderator analyses found no differences between effect size based on construct examined (discord or satisfaction). However, the magnitudes of observed effect sizes were influenced by other moderator variables, including the use of standardized versus non-standardized measures, gender of the offender and victim, role in the violence (perpetrator versus victim), and sample type (clinical versus community). The data suggests that gender is an especially important moderator variable in understanding the relationship between marital satisfaction/discord and IPV.  相似文献   
68.
69.
70.
As of 2014, 37 states have passed mandates requiring many private health insurance policies to cover diagnostic and treatment services for autism spectrum disorders (ASDs). We explore whether ASD mandates are associated with out‐of‐pocket costs, financial burden, and cost or insurance‐related problems with access to treatment among privately insured children with special health care needs (CSHCNs). We use difference‐in‐difference and difference‐in‐difference‐in‐difference approaches, comparing pre–post mandate changes in outcomes among CSHCN who have ASD versus CSHCN other than ASD. Data come from the 2005 to 2006 and the 2009 to 2010 waves of the National Survey of CSHCN. Based on the model used, our findings show no statistically significant association between state ASD mandates and caregivers’ reports about financial burden, access to care, and unmet need for services. However, we do find some evidence that ASD mandates may have beneficial effects in states in which greater percentages of privately insured individuals are subject to the mandates. We caution that we do not study the characteristics of ASD mandates in detail, and most ASD mandates have gone into effect very recently during our study period.  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