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   6496篇
  免费   206篇
各国政治   303篇
工人农民   270篇
世界政治   416篇
外交国际关系   241篇
法律   4279篇
中国政治   33篇
政治理论   1126篇
综合类   34篇
  2023年   47篇
  2020年   88篇
  2019年   115篇
  2018年   151篇
  2017年   163篇
  2016年   178篇
  2015年   96篇
  2014年   131篇
  2013年   635篇
  2012年   160篇
  2011年   192篇
  2010年   132篇
  2009年   162篇
  2008年   168篇
  2007年   163篇
  2006年   166篇
  2005年   135篇
  2004年   151篇
  2003年   164篇
  2002年   132篇
  2001年   271篇
  2000年   258篇
  1999年   195篇
  1998年   81篇
  1997年   81篇
  1996年   75篇
  1995年   65篇
  1994年   73篇
  1993年   66篇
  1992年   147篇
  1991年   135篇
  1990年   162篇
  1989年   153篇
  1988年   164篇
  1987年   147篇
  1986年   132篇
  1985年   133篇
  1984年   99篇
  1983年   87篇
  1982年   64篇
  1981年   62篇
  1980年   51篇
  1979年   66篇
  1978年   52篇
  1977年   40篇
  1976年   38篇
  1975年   38篇
  1974年   50篇
  1971年   39篇
  1970年   44篇
排序方式: 共有6702条查询结果,搜索用时 15 毫秒
61.
Subsequent to U.S. Border Patrol (USBP) efforts to control illegal immigration throughout the 1990s, concern arose over an apparent increase in deaths of illegal migrants as they began to undertake more treacherous routes to enter the United States from Mexico. In response, the Border Safety Initiative (BSI) was created to increase safety along the southwest border. Using multiple data sources, including the USBP BSI Incident Tracking System, this study evaluated the impact of life‐saving efforts performed under the BSI program. Results indicate that there has been no overall reduction in the rate of migrant deaths since BSI has been in operation. However, an evaluation of BORSTAR search and rescue teams and the 2003 Lateral Repatriation Program (LRP), which returned apprehended migrants from Tucson sector to less hazardous places along the border, were found to be effective in preventing migrant deaths. Policy Implications: Critics of U.S. immigration policy claim that the only way reductions in migrant deaths along the U.S.‐Mexico border can be achieved is through liberalization of immigration policy and relaxing of border security. Yet, for more than a decade, U.S. policy makers have increased restrictions on immigration and have tightened security at the borders. Considering this, alternative means must be deployed in order to save migrant lives in the near term rather than waiting for a reversal of immigration policy. This study suggests that proactive life‐saving measures implemented through a harm‐reduction strategy can have some impact on saving migrant lives.  相似文献   
62.
Law enforcement agencies and institutions of higher education have confronted increasing numbers of violent and destructive campus riots and disturbances over the past decade. Problematic is the fact that these riots typically have no underlying cause, other than students’ quest for excitement. Responding to gaps in the empirical literature about these events, this study used data from two waves of surveys to systematically examine those involved in a recurring problem event in a college town that was subject to a police crackdown. The analyses drew on survey responses from over eight hundred event participants in 2002 and 2003, and the results revealed that increased enforcement had a significant effect on crowd composition, including the gender and race of participants, repeat visitors, out-of-town participants, and perceptions about the subjects' overall experience. Implications for law enforcement and community strategies to decrease the size and destructiveness of such problem events are outlined.  相似文献   
63.
GORDGE  JOHN T. 《African affairs》1949,48(191):133-141
The rebellion in Madagascar has been officially declared overby M. de Chevigné, the Governor-General. This accountof its background is written by one who served many years asa missionary mainly in the South-West of the Island and playeda prominent part in the occupation by the Allies during thewar.  相似文献   
64.
65.
This article presents a conceptual framework for describing cases involving children with special needs that are increasingly being seen in family court. Three categories that represent the most common of such cases include (1) acute, life-threatening medical conditions; (2) chronic developmental disorders; and (3) psychological and behavioral syndromes. After detailing the nature of the disabilities in each category, perspectives from the bench are offered with specific recommendations and general strategies for effective case management. This is followed by a proposal of an innovative conceptual model—the Individualized Parenting Plan (IPP)—that organizes and integrates nine domains essential for a comprehensive parenting plan for special needs children. The article concludes with a list of sixteen strategic guidelines for servicing the families of these special needs children, in their best interests.  相似文献   
66.
A study of the various stressors faced by interns serving as security assistants at the Tenth Pan American Games and the coping mechanisms they utilized was undertaken during the months of July and August 1987. This study revealed that group development can be altered and maladaptive behavior can result among students experiencing high degrees of stress, frustration, and feelings of helplessness, who are subject to a leadership void. The data strongly support the need for planners of similar large-scale internship programs to consider group processes, organizational factors, and interpersonal relations if organizational goals are to be achieved, maladaptive coping mechanisms are to be avoided, and student stress is to be lessened.  相似文献   
67.
68.
69.
70.
This report assesses the effects on peripheral oxygen saturation and heart rate that positional restraint induces when a person is prone, handcuffed, and "hog-tied." Peripheral oxygen saturation and heart rate were monitored at rest, during exercise, and during recovery from exercise for 10 adult subjects. The effects of positional restraint produced a mean recovery time that was significantly prolonged. Consequently, the physiological effects produced by positional restraint should be recognized in deaths where such measures are used.  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