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   7519篇
  免费   157篇
各国政治   392篇
工人农民   201篇
世界政治   477篇
外交国际关系   292篇
法律   4727篇
中国共产党   1篇
中国政治   19篇
政治理论   1471篇
综合类   96篇
  2020年   63篇
  2019年   81篇
  2018年   121篇
  2017年   133篇
  2016年   158篇
  2015年   112篇
  2014年   129篇
  2013年   821篇
  2012年   202篇
  2011年   198篇
  2010年   158篇
  2009年   171篇
  2008年   205篇
  2007年   182篇
  2006年   190篇
  2005年   157篇
  2004年   157篇
  2003年   164篇
  2002年   166篇
  2001年   305篇
  2000年   278篇
  1999年   221篇
  1998年   88篇
  1997年   106篇
  1996年   82篇
  1995年   85篇
  1994年   93篇
  1993年   85篇
  1992年   162篇
  1991年   182篇
  1990年   160篇
  1989年   172篇
  1988年   150篇
  1987年   144篇
  1986年   168篇
  1985年   127篇
  1984年   126篇
  1983年   130篇
  1982年   78篇
  1981年   77篇
  1980年   59篇
  1979年   112篇
  1978年   65篇
  1977年   65篇
  1976年   57篇
  1975年   70篇
  1974年   86篇
  1973年   79篇
  1972年   67篇
  1971年   62篇
排序方式: 共有7676条查询结果,搜索用时 0 毫秒
921.
Reading the comparative analysis of federations as different, constitutionally and culturally, as Canada, the USA, Australia, India and Nigeria, to mention only a few, is to agree with the title of this review. The words are taken from the Introduction to Bakvis and Chandler and this review argues that use of the word "surprisingly" is misplaced. Much of the writing critical of federalism has been labouring under a misunderstanding of its dynamic nature and its underlying strengths.  相似文献   
922.
National estimates of time trends and age trends in self-reported illegal behavior in the United States are compared with corresponding figures for arrests. The self-report data are from Monitoring the Future, an annual national survey of high school seniors. The analysis of time trends covers 1975 through 1985 for a sample of over 3,000 respondents per year, studied at a constant age. The analysis of age trends covers ages 17 through 23 for samples of 300 to 1,200 per year. Both self-report and arrest measures reveal substantial declines in illegal behavior throughout this age span, with the exception of arrests for assault. Both methods also indicate that rates of assault increased from 1975 through 1985, a finding that has not previously been reported. Time trends for other offenses were erratic.  相似文献   
923.
This article discusses Capgras syndrome and its association with harmful and potentially harmful behaviors. Phenomenological and psychodynamic analysis of a series of cases will highlight danger signals that may be present in Capgras patients.  相似文献   
924.
A method is described for the determination of glyoxalase I phenotypes in liquid blood and dry bloodstains. The frequencies of glyoxalase I phenotypes in various populations of S.E. England are included.  相似文献   
925.
Equipment for annealing casework sized glass particles is described. Investigations were carried out using a simple muffle furnace, a temperature programmed furnace and a metal sample holder. Because they produced a uniform and reproducible thermal environment, best results were obtained from a combination of the temperature programmed furnace and the metal sample holder. Refractive index changes for window and toughened glass specimens were investigated and a simple, reproducible annealing routine for casework was devised.  相似文献   
926.
Ultrasonic determinations were made of facial tissue thicknesses in 50 healthy American caucasoid children, ranging in age from 4 to 15. Twenty measurements were taken at sites along the median, right sagittal, and right lateral planes. A static scanner was used in the B-mode. Three measurements significantly increased with age, the mid-philtrum (rs = 0.43, p less than 0.01) in females, the mental sulcus (rs = 0.30, p less than 0.05) in males, and the frontal eminence (rs = 0.32, p less than 0.05) in both sexes. Moreover, 25% of the measurements, while not statistically significant, decreased with increasing age. These data provide a basis for facial reproductions in caucasoid children.  相似文献   
927.
928.
A case of fatal amniotic fluid embolism leading to hypernatremia during a hypertonic saline-induced abortion is reported. This sequence of events has not, to our knowledge, been previously reported. Hypernatremia as a diagnostic aid for amniotic fluid embolism is discussed.  相似文献   
929.
930.
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