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   10762篇
  免费   406篇
各国政治   712篇
工人农民   458篇
世界政治   843篇
外交国际关系   520篇
法律   5995篇
中国共产党   2篇
中国政治   148篇
政治理论   2384篇
综合类   106篇
  2020年   165篇
  2019年   196篇
  2018年   276篇
  2017年   320篇
  2016年   327篇
  2015年   244篇
  2014年   283篇
  2013年   1401篇
  2012年   299篇
  2011年   383篇
  2010年   282篇
  2009年   305篇
  2008年   311篇
  2007年   293篇
  2006年   281篇
  2005年   248篇
  2004年   271篇
  2003年   286篇
  2002年   204篇
  2001年   381篇
  2000年   361篇
  1999年   309篇
  1998年   161篇
  1997年   125篇
  1996年   124篇
  1995年   112篇
  1994年   116篇
  1993年   115篇
  1992年   167篇
  1991年   168篇
  1990年   154篇
  1989年   151篇
  1988年   168篇
  1987年   163篇
  1986年   165篇
  1985年   155篇
  1984年   154篇
  1983年   163篇
  1982年   101篇
  1981年   79篇
  1980年   92篇
  1979年   106篇
  1978年   84篇
  1977年   73篇
  1976年   74篇
  1975年   60篇
  1973年   52篇
  1972年   55篇
  1971年   57篇
  1969年   55篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
We describe an autopsy case of a 61-year-old woman with von Recklinghausen's disease, who died suddenly following intraperitoneal hemorrhage due to the rupture of a giant splenic artery aneurysm. The aneurysm measured 16 x 13 x 5.5 cm--much larger than those in most previous reports. The pancreatic body, which was pressed by the aneurysm, was widely atrophic. In general, splenic artery aneurysms are more frequent in pregnant women or patients with portal hypertension. The pathogenesis of this aneurysm is presumed to be arterial dysplasia, focal arterial inflammation, or portal hypertension, unlike other aneurysms due to arteriosclerosis or syphilis. Since the patient had not been pregnant and had not had liver cirrhosis or arteriosclerosis, the pathogenic factor could not be determined in this case. The relationship between the genesis of the aneurysm and von Recklinghausen's disease was not clear either.  相似文献   
982.
983.
984.
985.
986.
Eleven incidents of carbon monoxide (CO) intoxication resulting in sixteen fatalities are reported. All of the cases involved heating systems as either the source or the means of distributing the CO. Blood samples were analyzed for ethanol and CO. Elevated blood CO saturations were found in 14 of the 16 victims while none of the victims had a blood ethanol concentration greater than 0.10% (w/v).  相似文献   
987.
The dermal surface (after enzymatic digestion of the dermo-epidermal junction) in electric and heat lesions is described. There do not appear to be elements that help in forming a precise differential diagnosis. It is possible, however, to differentiate these lesions from all traumatic cutaneous injuries and some limited nontraumatic lesions (e.g., verrucae). Remarkably good preservation of the dermal surface even in an advanced state of decomposition does suggest the possibility of certain diagnosis of electric and heat lesions even when postmortem phenomena have greatly damaged or even totally removed the epithelial part of the skin.  相似文献   
988.
Abstract: The frequency and characteristics of suicide by cop cases (SBC) among a large (n = 707) nonrandom sample of North American officer-involved shootings (OIS) were investigated. “Suicide by cop” is when a subject engages in behavior which poses an apparent risk of serious injury or death, with the intent to precipitate the use of deadly force by law enforcement against the subject. Thirty-six percent of the OIS in this sample were found to be SBC with high interrater agreement (intraclass correlation coefficient = 0.93) for category classification. SBC cases were more likely to result in the death or injury of the subjects than regular OIS cases. Most SBC cases were spontaneous, but had clear verbal and behavioral indicators that occurred prior to, and during the event. Findings confirm the trend detected in earlier research that there was a growing incidence of SBC among OIS. SBC individuals had a high likelihood of possessing a weapon (80%), which was a firearm 60% of the time. Half of those with a firearm discharged it at the police during the encounter. Nineteen percent simulated weapon possession to accomplish their suicidal intent. Other findings highlight the histories and commonalities in this high risk group.  相似文献   
989.
The prevalence of serious mental illnesses in jail populations is significantly greater than in the general population. Identifying individuals who warrant psychiatric evaluations is important and benefits correctional staff as well as detainees. One widely used screening instrument intended for this task is the Referral Decision Scale (RDS). This paper reviews the development and validation of the RDS. Using data from a multisite study which assessed postrelease outcomes for detainees with mental illness, various types of validity are addressed. The results confirm that the RDS has some inherent characteristics that seriously limit its practical application as a screening instrument for use by correctional staff.  相似文献   
990.
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