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   11978篇
  免费   593篇
各国政治   450篇
工人农民   508篇
世界政治   828篇
外交国际关系   333篇
法律   8200篇
中国共产党   1篇
中国政治   66篇
政治理论   2138篇
综合类   47篇
  2021年   67篇
  2020年   194篇
  2019年   235篇
  2018年   320篇
  2017年   317篇
  2016年   388篇
  2015年   266篇
  2014年   285篇
  2013年   1021篇
  2012年   358篇
  2011年   388篇
  2010年   299篇
  2009年   323篇
  2008年   299篇
  2007年   268篇
  2006年   293篇
  2005年   624篇
  2004年   348篇
  2003年   257篇
  2002年   256篇
  2001年   477篇
  2000年   420篇
  1999年   305篇
  1998年   184篇
  1997年   152篇
  1996年   128篇
  1995年   118篇
  1994年   146篇
  1993年   132篇
  1992年   215篇
  1991年   242篇
  1990年   228篇
  1989年   249篇
  1988年   232篇
  1987年   221篇
  1986年   254篇
  1985年   226篇
  1984年   177篇
  1983年   187篇
  1982年   118篇
  1981年   122篇
  1980年   87篇
  1979年   138篇
  1978年   81篇
  1977年   79篇
  1976年   71篇
  1974年   97篇
  1973年   80篇
  1972年   81篇
  1971年   63篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
This Article analyzes potential conflicts that arise from both the judicial and administrative approval processes that govern the closure of charitable hospitals through a sale of all or substantially all of their assets. Examining the recent closure attempt by the Manhattan Eye, Ear & Throat Hospital as an example, the Article highlights the various public health and corporate law issues that are raised when a not-for-profit hospital seeks closure. The Article thoroughly discusses both the statutorily and judicially required approval schemes applicable to the closure of charitable hospitals. The Article also suggests ways in which these conflicts might be avoided or remedied, as well as gives advice regarding hospital board decisionmaking.  相似文献   
892.
893.
The heterozygous condition characterized by the presence of hemoglobin AS (sickle-cell trait) occurs in approximately 8% of the American black population. Unlike the homozygous state (sickle-cell disease), sickle-cell trait is not widely recognized as a cause of life-threatening illness or death despite over 30 case reports describing fatal or serious complications of exercise in young black males with this condition. These reports identify heat stress, dehydration, viral illness, and poor physical conditioning as factors which may contribute to exertional rhabdomyolysis and sudden death, suggesting multifactorial etiology. However, since sickling is known to occur postmortem, it remains controversial as to whether the pathogenesis of these exercise related deaths involves microvascular obstruction by sickled erythrocytes. We describe three young black individuals with no significant past medical history who died following physical exertion. In all three cases, postmortem hemoglobin electrophoresis demonstrated hemoglobin AS. In none of the cases was the body temperature found to be elevated. These cases serve to remind the forensic community that, in the proper setting, sickle-cell trait must be viewed as a potentially fatal disorder.  相似文献   
894.
895.
This study examined the psychological characteristics of a sample of self-reported stalkers in comparison with a control group, on measures of empathy, problem-solving skills, attachment, and borderline personality features. Stalkers were identified by their endorsement of specific behavioral items, consistent with a widely adopted definition of stalking, denoting behaviors that: (a) are repeatedly directed toward an identified target; (b) are intrusive and unwanted; and (c) evoke fear in the victim. Stalkers scored significantly higher than controls on measures of insecure attachment and borderline personality features, suggesting that the stalking group demonstrates a general pattern of inadequate interpersonal attachment, has limited abilities to form and maintain appropriate relationships, is emotionally labile and unstable, and experiences ambivalence regarding their interpersonal relationships. Treatment implications are discussed herein.  相似文献   
896.
Chemical processes involved in the development of latent fingerprints using the cyanoacrylate fuming method have been studied. Two major types of latent prints have been investigated-clean and oily prints. Scanning electron microscopy (SEM) has been used as a tool for determining the morphology of the polymer developed separately on clean and oily prints after cyanoacrylate fuming. A correlation between the chemical composition of an aged latent fingerprint, prior to development, and the quality of a developed fingerprint has been observed in the morphology. The moisture in the print prior to fuming has been found to be more important than the moisture in the air during fuming for the development of a useful latent print. In addition, the amount of time required to develop a high quality latent print has been found to be within 2 min. The cyanoacrylate polymerization process is extremely rapid. When heat is used to accelerate the fuming process, typically a period of 2 min is required to develop the print. The optimum development time depends upon the concentration of cyanoacrylate vapors within the enclosure.  相似文献   
897.
On request of the International Criminal Tribunal for the former Yugoslavia (ICTY), the Danish-Swedish forensic teams worked in Kosovo during the summer and the fall of 1999. The teams worked mainly as "mobile teams" at sites with few graves. Only two larger sites were examined. Most of the bodies were buried separately. A few "multiple burial" graves were examined, but no mass graves were encountered. The main purpose of the autopsies was to establish the cause and manner of death. Identification was of less importance, but a majority of the bodies had been identified prior to the autopsy. A total of 308 bodies, mainly males, were examined. The age varied greatly with a mean age of 47 years. The most common cause of death was gun shot wounds and the most common manner of death was homicide.  相似文献   
898.
Forensic medical service is constantly updated, which is confirmed by introduction of new modern methods, such as detection of blood or semen with test strips, new modifications of methods for handling bone material, differentiation of blood of the same group within ABO system, identification of blood groups in mixed stains of blood of humans and some animals, use of gel plates, etc. Methodological and information letters have been issued and field seminars are regularly carried for upgrading expert biologists. The overwhelming majority of expert biologists have received specialized education and topical upgrading.  相似文献   
899.
900.
Methods for measuring a Russian narcotic analgesic prosidol are suggested: thin-layer chromatography, microcrystalloscopy, gaseous chromatography with ionization flame detector, gas chromatography with mass selective detector, ultraviolet spectroscopy, high-performance liquid chromatography with ultraviolet detector, proton nuclear magnetic resonance used in chemical toxicological analysis, pharmacological analysis, and investigation of material evidence pieces.  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