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   9479篇
  免费   294篇
各国政治   633篇
工人农民   414篇
世界政治   742篇
外交国际关系   396篇
法律   5422篇
中国共产党   2篇
中国政治   144篇
政治理论   1927篇
综合类   93篇
  2020年   125篇
  2019年   152篇
  2018年   216篇
  2017年   232篇
  2016年   237篇
  2015年   206篇
  2014年   211篇
  2013年   1166篇
  2012年   250篇
  2011年   326篇
  2010年   236篇
  2009年   254篇
  2008年   271篇
  2007年   248篇
  2006年   239篇
  2005年   213篇
  2004年   232篇
  2003年   252篇
  2002年   173篇
  2001年   358篇
  2000年   333篇
  1999年   300篇
  1998年   150篇
  1997年   106篇
  1996年   122篇
  1995年   106篇
  1994年   109篇
  1993年   108篇
  1992年   164篇
  1991年   160篇
  1990年   154篇
  1989年   142篇
  1988年   168篇
  1987年   159篇
  1986年   160篇
  1985年   148篇
  1984年   148篇
  1983年   154篇
  1982年   93篇
  1981年   69篇
  1980年   83篇
  1979年   100篇
  1978年   81篇
  1977年   67篇
  1976年   71篇
  1975年   59篇
  1973年   49篇
  1972年   53篇
  1971年   54篇
  1969年   54篇
排序方式: 共有9773条查询结果,搜索用时 109 毫秒
71.
"Constitution of a trade bloc between Mexico, the United States and Canada through the North American Free Trade Agreement (NAFTA) in this decade has called attention to...the role of Mexico's southern border, Central American conflicts and migrations from that era. Relevant adjustments have been made to Mexico's policy in approaching problems regarding its southern neighbors. These changes respond largely to the perception held by larger economic blocs and migration generated by unequal development levels within these regions and countries." (SUMMARY IN ENG)  相似文献   
72.
73.
Measuring School-Related Stressors in Adolescents   总被引:2,自引:0,他引:2  
Some 1620 high school students responded to 68 items that measure adolescent stressors. Thirty-five of the items were based on J. P. Kohn and G. H. Frazer's Academic Stress Scale [1(1986) An Academic Stress Scale: Identification and Rated Importance of Academic Stressors, Psychological Reports, Vol. 59, pp. 415–426] developed in the United States, while the remaining 33 items were developed from P. Strutynski's [(1985) A Survey of Queensland Year 10, 11 and 12 Student Attitudes to Schools and Schooling, State Planning Committee, International Youth Year, Brisbane] lists of the most frequently named problems of 2336 Australian high school students. Confirmatory Factor Analysis was used to test and develop a measurement model developed from an extensive review of previous scales. The High School Stressors Scale emerged from the analytic process and measures nine school-related stressors. For researchers focusing on school-related problems and stressors among adolescents, the HSSS promises to be a very useful instrument. It has sound construct and predictive validity and adequate reliability, as demonstrated by the goodness-of-fit indices the squared multiple correlations.  相似文献   
74.
75.
76.
77.
Caring from afar     
Kalb C 《Newsweek》1997,130(12):87-88
  相似文献   
78.
79.
Until new statutes and court decisions clarify the law applicable to outcomes research, providers will continue to face new questions. In the meantime, paying careful attention to satisfying the requirements of existing laws protecting peer review information will put providers in the best position to minimize their exposure. Providers should review their current outcomes measurement and management systems to ensure that (1) they are structured to take full advantage of the confidentiality protections available under state law, and (2) appropriate access to outcomes data for those who need it is clearly provided for in the relevant documentation.  相似文献   
80.
Doe demonstrates that once an employer enters into a relationship with an individual and thereafter determines that he or she may be disabled, the employer has the right to ask the individual questions about the possible disability when those questions are relevant to assessing his or her qualifications for continuing on the job. In fact, once a health care provider is on notice that an employee's or physician's disability may render the employee or physician no longer qualified, thereby potentially endangering patients, the provider is required to determine whether the person is qualified for the job. In these sensitive matters, employers must draw a fine line between unreasonably following up on every rumor on the one hand, and on the other hand investigating reliable information when there may indeed be a direct threat to patients.  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