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   3938篇
  免费   88篇
各国政治   230篇
工人农民   137篇
世界政治   267篇
外交国际关系   138篇
法律   2564篇
中国政治   25篇
政治理论   632篇
综合类   33篇
  2020年   48篇
  2019年   53篇
  2018年   58篇
  2017年   77篇
  2016年   96篇
  2015年   49篇
  2014年   87篇
  2013年   401篇
  2012年   99篇
  2011年   106篇
  2010年   59篇
  2009年   75篇
  2008年   101篇
  2007年   112篇
  2006年   92篇
  2005年   108篇
  2004年   115篇
  2003年   105篇
  2002年   104篇
  2001年   187篇
  2000年   156篇
  1999年   96篇
  1998年   48篇
  1997年   39篇
  1996年   31篇
  1995年   28篇
  1994年   40篇
  1993年   36篇
  1992年   83篇
  1991年   97篇
  1990年   90篇
  1989年   104篇
  1988年   103篇
  1987年   89篇
  1986年   89篇
  1985年   83篇
  1984年   50篇
  1983年   55篇
  1982年   31篇
  1981年   36篇
  1979年   42篇
  1978年   27篇
  1977年   29篇
  1976年   28篇
  1975年   37篇
  1974年   36篇
  1973年   40篇
  1972年   39篇
  1971年   26篇
  1969年   29篇
排序方式: 共有4026条查询结果,搜索用时 0 毫秒
151.
The relationship between ethanol and risk of heroin overdosage was studied. Statistical processing of the results of forensic chemical analysis (460 expert evaluations) carried out in Chelyabinsk Regional Bureau of Forensic Medical Expert Evaluations in 2000 was carried out. The results of morphine and ethanol measurements in the blood and urine from corpses where deaths ensued from narcotic or ethanol poisoning, were analyzed. The concentrations of morphine in the blood and urine were measured on a gaseous chromatographer with mass-selective detector (Hewlett Packard HP 6890/HP-5972). Methods for measuring urinary and blood morphine are described. The results of statistical analysis demonstrated relationships between the age and ethanol concentrations in the blood and urine; blood ethanol and total urinary and blood morphine concentrations; blood concentration of free morphine and presence of 6-monoacetylmorphine in the blood. The authors conclude that the presence of ethanol in the blood together with morphine drastically augments the risk of rapid death from respiration arrest. It can also lead to a relatively high risk of overdosage in experienced narcomaniacs using heroin and ethanol.  相似文献   
152.
Crystallographic analysis of the cerebrospinal fluid (CSF) was carried out in 18 cases of death from coronary disease and 19 cases of death from ethanol poisoning. The crystallograms were evaluated visually and by the stereoscopic picture. Specific features of the CSF crystal colonies growth in subjects dead from the above conditions are determined.  相似文献   
153.
Eleven cases with migration (escape) of catheters, inserted into subclavian veins, into the vascular bed, are analyzed by the results of forensic medical evaluations. Expert evaluation of aftereffects of the complications caused by flaws in medical care is made. Suggestions are made on evaluation of the severity of harm inflicted to health in such cases and the criteria of such evaluations are offered.  相似文献   
154.
Conclusions of 41 repeated expert evaluations of craniocerebral injuries within the framework of criminal and civil cases investigation are analyzed. Some aspects of clinical and forensic medical diagnosis of lethal and nonlethal injuries to the head, evaluation of the quality of medical care, and qualification of the severity of harm to health are discussed. Causes of typical expert errors and approaches to their prevention are shown.  相似文献   
155.
The article presents the results of an examination of the dry residue of liquor crystallograms (DRLC) using infrared spectroscopy technique. 36 spectrograms were studied. Elements of similarity and difference were revealed in the spectrograms of organic substance (antifreeze, sodium cyclamate and fatty tissue), of DRLC of the crystal-forming matter CuCl(2)x2H(2)0, of DRLC of a live person and cadaveric liquor (with no brain injury in respective case histories), of DRLC of liquor of live persons with a brain injury, of DRLC of liquor of persons who died of a brain injury and of persons who died of other causes.  相似文献   
156.
103 studies of torn aneurysms in the cerebral vessels are described. Localizations, morphological peculiarities of aneurysms as well as the nature of intracranial hemorrhages caused by torn aneurysms are presented. The authors have a critical attitude to the "acquired" theory of aneurysm development.  相似文献   
157.
Child death due to repeated episodes of physical assault or neglect has been termed the child abuse-maltreatment syndrome (CAMS). We characterized the injuries in a series of fatally abused or maltreated child to delineate objective diagnostic criteria for the CAMS for use by clinicians and pathologists. All deaths (age <17 years) investigated by the Office of the Chief Coroner for Ontario, Canada during the time period 1990-1995 were reviewed. Cases of CAMS were defined as death due to lethal recent injury or malnutrition in the presence of significant old (healing or healed) injuries indicative of repeated episode of inflicted trauma. The nature and frequency of the various injuries was determined. The frequency of the shaken baby syndrome, and the types and frequency of ano-genital injuries were also studied. Twenty-one cases of fatal CAMS were found in the study period. Most cases had significant recent head injury with intra-cranial hemorrhage (71%). Other significant recent injuries commonly observed included blunt injuries of the skin and soft tissues (67%), blunt abdominal trauma with visceral injuries (14%), and fractures (18%). Eight cases (38%) fulfilled accepted criteria for the shaken baby syndrome. Many children with fatal head injuries had evidence of older head trauma (38% of all cases). A significant minority of cases had evidence of malnutrition due to neglect (10%) or ongoing ano-genital injuries (10%). Most cases of child homicides due to repeated episodes of abuse or maltreatment involve head trauma including shaken baby syndrome. Fractures of long bone and ribs, the classical markers of child abuse, were relatively infrequent compared with head injury. A proportion of cases had ano-genital injuries due to repeated sexual abuse or punitive maltreatment. All clinicians and pathologists must recognize the wide spectrum of injuries in child abuse to ultimate protect the victim or other children in an at-risk situation.  相似文献   
158.
159.
160.
Since about 2000, Russia became increasingly interested in a swift expansion of its oil and gas industry to the eastern regions, aiming primarily at the domestic development needs and new markets of Northeast Asia. Eastern Siberia and the Far Eastern areas contain up to 50 percent of Russia's estimated oil reserves. In this context, the Eastern Siberia–Pacific Ocean oil pipeline is attracting attention as a mega-project important not only for Russia, but also for its neighbors. This pipeline will facilitate the development of new oil fields in the remote eastern areas. There are also plans to build oil refineries connected to the pipeline, including the one planned on the Pacific coast. Indeed, Russia needs an access to the neighboring markets not only in the field of oil, but also natural gas and electricity. In this regard, long-term shared interests should drive new energy projects, and governments could greatly facilitate business interaction. Moreover, specific measures dealing with the long-term energy policies are required at the national, bilateral and regional levels, including practical and project specific initiatives tailored to the needs of the economies of Northeast Asia, considering their large markets, geography, technological potential and an interest in building institutions.  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