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   17716篇
  免费   530篇
各国政治   750篇
工人农民   780篇
世界政治   1466篇
外交国际关系   614篇
法律   10574篇
中国共产党   2篇
中国政治   82篇
政治理论   3797篇
综合类   181篇
  2021年   99篇
  2020年   236篇
  2019年   285篇
  2018年   372篇
  2017年   430篇
  2016年   461篇
  2015年   313篇
  2014年   356篇
  2013年   1781篇
  2012年   435篇
  2011年   458篇
  2010年   359篇
  2009年   401篇
  2008年   465篇
  2007年   493篇
  2006年   457篇
  2005年   412篇
  2004年   411篇
  2003年   434篇
  2002年   402篇
  2001年   688篇
  2000年   621篇
  1999年   513篇
  1998年   287篇
  1997年   246篇
  1996年   210篇
  1995年   212篇
  1994年   244篇
  1993年   225篇
  1992年   341篇
  1991年   368篇
  1990年   329篇
  1989年   343篇
  1988年   319篇
  1987年   333篇
  1986年   340篇
  1985年   333篇
  1984年   285篇
  1983年   317篇
  1982年   256篇
  1981年   239篇
  1980年   179篇
  1979年   247篇
  1978年   166篇
  1977年   145篇
  1976年   130篇
  1975年   120篇
  1974年   135篇
  1973年   117篇
  1972年   112篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
The remains of an unidentified female neonate were discovered in a field in central Missouri. Examination revealed bilateral absence of the parietal bones. A search of the literature describing similar defects suggests that the present case represents a unique condition, described here for the first time.  相似文献   
44.
To demonstrate that norms have independent causal power, constructivists de-emphasise material factors related to state interests and highlight social factors. Similarly, they conceptualise international organisations as autonomous from state influence, and focus on cases featuring non-state actors that stimulate a “tipping point” of norm diffusion among states in advance of state sponsorship. By contrast, this article utilises an historical materialist approach that admits both social and material data to examine the contrasting case of population control. It finds that US corporate foundations, eugenist demographers, feminist birth control activists and related NGOs conceptualised and promoted population control in the United States, at the United Nations, and across developing countries. However, the tipping point of norm diffusion occurred only after the United States publicly advocated population control. Indeed, material and social factors were inextricably bound together.  相似文献   
45.
46.
47.
48.
Offender assessment and classification is becoming an increasingly important part of correctional supervision and intervention. Over the last several decades, several different methods and “generations” of offender classification have emerged. Of most value appear to be third-generation, actuarial, dynamic risk/need assessments. With any new correctional strategy, however, there is a need to investigate the use of these risk/need assessments on offender subgroups in order to inform issues, such as reliability and prevalence of criminogenic risk factors. The present study utilized data that were gathered using the Level of Service Inventory-Revised (LSI-R). Results and comparisons of these assessments were investigated and presented for Native American and non-Native American offenders as well as male and female offenders. Discussion of the results, implications, and recommendations for further research are presented.  相似文献   
49.
Esophageal and tracheal fistulas, which occur in 0.05% of medicolegal autopsies, were demonstrated in three cases by a postmortem radiographic technique using silicone rubber/lead oxide as a contrasting medium that vulcanizes at room temperature. In one 83-year-old male, a tracheoesophageal fistula was detected, which had developed after surgical repair of an esophageal rupture caused by a flexible fiberoptic endoscope. In a second case, carcinoma of the esophagus in a 78-year-old male had eroded the trachea and arcus of the aorta creating a fatal tracheoesophagoaortic fistula. In a third case, 55-year-old female developed a tracheobrachicephalic artery fistula as a result of an infiltrating cystic adenocarcinoma of the trachea, resulting in a fatal hemorrhage into the trachea. The results of this study indicate that diagnostic radiologic methods using a vulcanized contrasting medium are useful in supplementing normal dissection in autopsy cases with suspected fistulas of the esophagus or trachea.  相似文献   
50.
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