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   10484篇
  免费   547篇
各国政治   416篇
工人农民   359篇
世界政治   808篇
外交国际关系   300篇
法律   7085篇
中国共产党   1篇
中国政治   54篇
政治理论   1968篇
综合类   40篇
  2021年   60篇
  2020年   192篇
  2019年   233篇
  2018年   235篇
  2017年   291篇
  2016年   295篇
  2015年   245篇
  2014年   269篇
  2013年   984篇
  2012年   235篇
  2011年   303篇
  2010年   286篇
  2009年   300篇
  2008年   286篇
  2007年   257篇
  2006年   274篇
  2005年   248篇
  2004年   249篇
  2003年   234篇
  2002年   238篇
  2001年   462篇
  2000年   419篇
  1999年   291篇
  1998年   181篇
  1997年   147篇
  1996年   123篇
  1995年   118篇
  1994年   144篇
  1993年   133篇
  1992年   199篇
  1991年   217篇
  1990年   203篇
  1989年   212篇
  1988年   205篇
  1987年   190篇
  1986年   231篇
  1985年   208篇
  1984年   160篇
  1983年   169篇
  1982年   113篇
  1981年   120篇
  1980年   85篇
  1979年   131篇
  1978年   75篇
  1977年   73篇
  1976年   69篇
  1974年   73篇
  1973年   66篇
  1972年   66篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
This final article is a synthesis of findings from the seven country studies in this special issue. Although there are characteristics common to all group systems, particularly those transitioning to democracy, there are also significant differences. Analysis of these differences reveals a direct relationship between both the level of socioeconomic and political development and the characteristics of the group systems in all Balkan countries. In addition, we provide new insights into group system development and operation. These are particularly related to the impact of war, inter‐ethnic cleavages, constitutional arrangements (majoritarian and consociational), economic crises, geopolitics, and the major presence of external interests.  相似文献   
992.
Journal of Youth and Adolescence - Although most adolescents are healthy, epidemiological studies show that a significant number experience mental health challenges, and that Indigenous and ethnic...  相似文献   
993.
Journal of Youth and Adolescence - Adolescents’ self-control develops in the context of mental health and family functioning, but it is unclear how the interplay of self-control, mental...  相似文献   
994.
Journal of Youth and Adolescence - When testing longitudinal effects of parenting practices on adolescent adjustment, an integrated consideration of externalizing and internalizing behaviors is a...  相似文献   
995.
European Journal of Law and Economics - Despite prosecutors’ difficulties in proving corporate bribery, nearly all enforcement actions end with a settlement at the pretrial stage. Compared to...  相似文献   
996.
Journal of Indian Philosophy - The Yogār?ava (‘the ocean of yoga’) is a Sanskrit compendium on yoga that has not been published, translated or even mentioned in secondary...  相似文献   
997.
This study presents a series of 16 carriers of hemoglobin S (HbS) who died during various circumstances. Many of the cases were associated with mild to moderate exertion. The onset and/or duration of symptoms varied from a few minutes to several hours with many displaying a prolonged lucid interval with stable vital signs. Despite seeking medical treatment, sickle cell trait-related micro-occlusive crisis was never considered in the differential diagnosis. Several cases were associated with sudden death. In those deaths which were delayed, high anion gap and uncompensated metabolic acidosis were typical and were not heat related. Also characteristic were large increases in creatine kinase, alanine aminotransferase, and aspartate aminotransferase along with myoglobinemia. Although the antemortem diagnosis of rhabdomyolysis was made, the underlying cause was never deduced by the clinicians. The sickling found at autopsy is not always a postmortem artifact, and in the right circumstances can be diagnostic.  相似文献   
998.
The intradural sagittal diameter at the second cervical vertebra (SD/C2) of 62 SIDS cases was measured myelographically. This SD/C2 proved to be dependent on body size, body weight, and age. A clear, age-dependent difference is to be found in the primarily narrow spinal canal. This parameter (SD/C2), which is more precisely defined in adults on the basis of clinical, radiological, and autopsical findings is assumed to have the value of 0.5 cm in the first 2 months, 0.6 cm in the third month, and 0.65 cm in the fourth month. The resulting potential danger to infants is dependent upon their position. The SD/C2, was significantly decreased in extension as compared to a neutral posture. With consideration of the primarily narrow spinal canal in the infant, there is, according to our measurements, a potential hazard for the infant in any further, significant shortening of the SD/C2. This is independent of the width of the spinal canal under maximal extension. We found individual cases in which the SD/C2 was decreased by almost 50% from the normal value in neutral position. No correlation was found between the primary width of the spinal canal and the degree of luminal reduction upon extension.  相似文献   
999.
The chemical substances of perspiration found in latent fingerprint residue may hold the key for dating latent fingerprints. To study the chemical transformations of these components as a function of time and environment, fingerprint residues from four males and four females were analysed by thin-layer chromatography (TLC) and high performance liquid chromatography (HPLC). Three major and two or three minor components were detected by both methods and the variation in the quantity of the major components with time was observed.  相似文献   
1000.
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