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   1507篇
  免费   65篇
各国政治   91篇
工人农民   108篇
世界政治   105篇
外交国际关系   80篇
法律   777篇
中国政治   47篇
政治理论   359篇
综合类   5篇
  2023年   14篇
  2022年   10篇
  2021年   16篇
  2020年   36篇
  2019年   43篇
  2018年   62篇
  2017年   54篇
  2016年   69篇
  2015年   37篇
  2014年   47篇
  2013年   235篇
  2012年   49篇
  2011年   51篇
  2010年   46篇
  2009年   54篇
  2008年   56篇
  2007年   52篇
  2006年   49篇
  2005年   51篇
  2004年   38篇
  2003年   44篇
  2002年   40篇
  2001年   35篇
  2000年   31篇
  1999年   27篇
  1998年   10篇
  1997年   20篇
  1996年   13篇
  1995年   21篇
  1994年   18篇
  1993年   17篇
  1992年   21篇
  1991年   21篇
  1990年   15篇
  1989年   11篇
  1988年   9篇
  1987年   14篇
  1986年   12篇
  1985年   16篇
  1984年   10篇
  1983年   16篇
  1982年   7篇
  1981年   12篇
  1980年   7篇
  1979年   6篇
  1978年   10篇
  1976年   6篇
  1974年   4篇
  1972年   4篇
  1967年   5篇
排序方式: 共有1572条查询结果,搜索用时 15 毫秒
1.
ABSTRACT

Since the late 20th century, the federal government has regulated colleges’ and universities’ handling of campus sexual and gender-based violence (CSGBV). Although the arc of history has bent toward establishing greater protections for victims of such violence, new proposed regulation by the U.S. Department of Education under the Trump administration focuses more heavily on ensuring due process rights for students accused of CSGBV. Most recently, in November 2018, U.S. Secretary of Education, Betsy DeVos submitted a proposed rule change to the regulation of Title IX of the Education Amendments of 1972. This article provides the historical context for this most recent proposed federal regulation of CSGBV and discusses the criticism of this proposal that, if it is implemented, students would become less safe in the ivory tower.  相似文献   
2.

Young adulthood represents a developmental period with disproportionately heightened risk of losing a job. Young adult unemployment has been linked to increased mental health problems, at least in the short term. However, their possible long-term impacts, often referred as “scarring effects,” have been understudied, possibly underestimating the magnitude of mental health burden that young adult unemployment generates. This longitudinal study examined whether duration of unemployment during young adulthood is associated with later mental health disorders, after accounting for mental and behavioral health problems in childhood. Furthermore, the current study investigated whether childhood neighborhood characteristics affect this association and if so, in what specific functional ways. Data were drawn from a longitudinal study of developmental outcomes in a community sample in Seattle. Data collection began in 1985 when study participants were elementary students and involved yearly assessments in childhood and adolescence (ages 10–16) and then biennial or triennial assessments (ages 18–39; N?=?677 at age 39; 47% European American, 26% African American, 22% Asian American, and 5% Native American; 49% female). The current study findings suggest that duration of unemployment across young adulthood increased mental health problems at age 39, regardless of gender. Childhood neighborhood characteristics, particularly their positive aspect, exerted independent impacts on adult mental health problems beyond unemployment experiences across young adulthood. The current findings indicate a needed shift in service profiles for unemployed young adults—a comprehensive approach that not only facilitates reemployment but also addresses mental health needs to help them to cope with job loss. Further, the present study findings suggest that childhood neighborhoods, particularly positive features such as positive neighborhood involvement, may represent concrete and malleable prevention targets that can curb mental health problems early in life.

  相似文献   
3.
Lophophora is a member of the Cactaceae family, which contains two species: Lophophora williamsii and L. diffusa. Lophophora williamsii is an illegal plant containing mescaline, a hallucinogenic alkaloid. In this study, a novel method based on a single nucleotide polymorphism (SNP) assay was developed for identifying L. williamsii; this assay reliably detects SNPs within chloroplast DNA (rbcL, matK, and trnL-trnF IGS) and was validated for identifying Lophophora and L. williamsii simultaneously. The chloroplast DNA sequences from four L. williamsii and three L. diffusa plants were obtained and compared using DNA sequence data from approximately 300 other Cactaceae species available in GenBank. From this sequence data, a total of seven SNPs were determined to be suitable for identifying L. williamsii. A multiplex assay was constructed using the ABI PRISM® SNaPshot™ Multiplex Kit (Applied Biosystems, Forster City, CA) to analyze species-specific SNPs. Using this multiplex assay, we clearly distinguished the Lophophora among 19 species in the Cactaceae family. Additionally, L. williamsii was distinguished from L. diffusa. These results suggest that the newly developed assay may help resolve crimes related to illegal distribution and use. This multiplex assay will be useful for the genetic identification of L. williamsii and can complement conventional methods of detecting mescaline.  相似文献   
4.
5.
South Korea sent troops to Iraq not because of any perceived threat from an Iraqi nuclear programme, but to seek influence over American foreign policy towards North Korea. At no point did the general public support the American invasion and war in Iraq; most South Koreans also opposed sending troops to Iraq. However, the government chose to send first non-combat and later combat troops to Iraq, and the public approved of the former choice and support was growing for the latter. The liberal President Roh Moo-Hyun had to persuade the public on this issue, even in opposition to his core supporters, risking political isolation. What the public and the President aimed at was a peaceful resolution of the North Korean nuclear issue and business opportunities. The national interest that South Korea pursued in sending troops to Iraq was policy influence over the US guarantee not to use military power against North Korea.  相似文献   
6.
7.
8.
9.
The ECJ reiterates its support for the comparative advertiserby indicating that common sense is needed to comply with theMisleading Advertising and Comparative Advertising Directive(Directive 97/55).  相似文献   
10.
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