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   7240篇
  免费   168篇
各国政治   379篇
工人农民   192篇
世界政治   457篇
外交国际关系   278篇
法律   4584篇
中国共产党   1篇
中国政治   19篇
政治理论   1406篇
综合类   92篇
  2020年   61篇
  2019年   81篇
  2018年   121篇
  2017年   131篇
  2016年   150篇
  2015年   109篇
  2014年   126篇
  2013年   771篇
  2012年   199篇
  2011年   194篇
  2010年   153篇
  2009年   162篇
  2008年   194篇
  2007年   172篇
  2006年   184篇
  2005年   144篇
  2004年   149篇
  2003年   154篇
  2002年   160篇
  2001年   302篇
  2000年   275篇
  1999年   219篇
  1998年   80篇
  1997年   102篇
  1996年   77篇
  1995年   80篇
  1994年   90篇
  1993年   79篇
  1992年   156篇
  1991年   175篇
  1990年   155篇
  1989年   170篇
  1988年   147篇
  1987年   141篇
  1986年   163篇
  1985年   126篇
  1984年   124篇
  1983年   129篇
  1982年   77篇
  1981年   75篇
  1980年   57篇
  1979年   110篇
  1978年   63篇
  1977年   61篇
  1976年   56篇
  1975年   66篇
  1974年   81篇
  1973年   76篇
  1972年   67篇
  1971年   60篇
排序方式: 共有7408条查询结果,搜索用时 15 毫秒
791.
The extraction of DNA from human skeletal remains applied to forensic, and evolutionary studies do not exclude risks, which are to be evaluated when working with unique specimens that could be damaged or even destroyed. In the present study were evaluated several nondestructive methods for recovering DNA instead of the most currently used pulverization method. Three different procedures to access inside the dental pieces (occlusal perforation, cervical perforation, and cervical cut) have been compared with the aim of recovering as many cell remains as possible to carry out a DNA extraction. Given the DNA quantitation results, a method was proposed that consists of a cervical cut to facilitate the access to the pulp cavity and a subsequent filing of the root canals down to the apex of the dental root. This methodology allows the recovery of both mitochondrial and nuclear DNA, with the minimum deterioration for the dental pieces.  相似文献   
792.
793.
794.
The aim of this study was to analyze the differences between the handwritings of schizophrenia patients and healthy subjects in addition to the changes that occurred in schizophrenia patients' handwriting in response to the treatment. The test subjects were 29 schizophrenia patients and 29 healthy individuals with the same age, gender, and dominant hand. The changes in the handwritings were examined according to 14 different parameters. On the day of admittance, the percentage of extra letters was 16.7%, and after 7–10 days of hospitalization, it rose to 33.3%. The percentage of skipped words decreased from 29.2% to 16.7% after 7–10 days of hospitalization, and to 10% after 3 weeks. The letters written by schizophrenia patients are significantly larger in height and width compared to the control group. The schizophrenia patients showed a higher incidence of crossed-out letters, adding extra words, missing punctuation as well as missing words.  相似文献   
795.
796.
Two hundred seventy-five United States coins were discovered in the stomach of a mentally disturbed individual at autopsy. Many coins containing copper were corroded by prolonged contact with gastric juice, with subsequent absorption and deposition of copper in the liver and kidneys. The patient died from complications related to the acute toxic phase of chronic copper poisoning. A discussion of the case, foreign-body ingestion, gastric bezoars and the mechanism of copper toxicity is presented. To our knowledge, this is the first death due to copper intoxication following a massive ingestion of coins.  相似文献   
797.
798.
The media disproportionately focus on conventional crime while neglecting the impact of corporate misbehavior. The present research examines U.S. newspaper coverage of a deadly fire at a dance hall in Goteborg, Sweden. This particular incident facilitates an examination of how newspapers treat issues involving culpability of conventional offenders (arsonists) and white collar offenders (the owners of the nightclub and the promoters of the dance). It was found that newspapers disproportionately focused on the direct harm associated with the fire, and generally neglected the role played by the organizers/promoters. Suggestions are offered regarding the need for more complete media coverage of crime, particularly white collar crime. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
799.
An examination of self-report scales of 160 men and 76 of their partners or former partners found significant correlations between jealousy and abusiveness (for coupled dyads) or intrusiveness (for separated dyads). Jealousy was related to borderline personality and to MCMI-II measures of Post Traumatic Stress Disorder. Rejection sensitivity leading to pathological acts, such as abusiveness and intrusiveness, is seen as originating in early insecure attachment and exposure to shaming experiences.  相似文献   
800.
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