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   21533篇
  免费   701篇
  国内免费   5篇
各国政治   1088篇
工人农民   842篇
世界政治   1653篇
外交国际关系   878篇
法律   12642篇
中国共产党   6篇
中国政治   185篇
政治理论   4706篇
综合类   239篇
  2020年   281篇
  2019年   354篇
  2018年   440篇
  2017年   519篇
  2016年   535篇
  2015年   389篇
  2014年   433篇
  2013年   2359篇
  2012年   586篇
  2011年   623篇
  2010年   526篇
  2009年   529篇
  2008年   663篇
  2007年   766篇
  2006年   686篇
  2005年   617篇
  2004年   633篇
  2003年   651篇
  2002年   580篇
  2001年   763篇
  2000年   645篇
  1999年   560篇
  1998年   357篇
  1997年   258篇
  1996年   297篇
  1995年   241篇
  1994年   259篇
  1993年   270篇
  1992年   390篇
  1991年   436篇
  1990年   403篇
  1989年   345篇
  1988年   389篇
  1987年   350篇
  1986年   390篇
  1985年   324篇
  1984年   294篇
  1983年   284篇
  1982年   231篇
  1981年   233篇
  1980年   161篇
  1979年   212篇
  1978年   159篇
  1977年   145篇
  1976年   119篇
  1975年   149篇
  1974年   156篇
  1973年   133篇
  1972年   121篇
  1969年   110篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
The American Law Institute proposes that in contested physical custody cases the court should allocate to each parent a proportion of the child's time that approximates the proportion of time each has spent performing caretaking functions in the past. Examined through the lens of child development research, the approximation rule is unlikely to improve on the best interests standard. It is difficult to apply; is perceived as gender‐biased; creates a new focus for disputing parents; renders a poor estimate of parents’ contributions to their child's best interests; overlooks parents’ intangible, yet significant, contributions to their child's well‐being; and miscalculates the essence of how a child experiences the family. A preferable alternative is a better defined, contemporary best interests standard that accommodates new knowledge and reforms that encourage nonadversarial, individualized resolutions of custody disputes.  相似文献   
32.
33.
Having found that a deep hyperlink on Davis' website to livestreaming of a motorcycle race owned by Live Nation constitutescopying, the court granted Live Nation's Motion for summaryjudgment in its copyright infringement claim and enjoined Davisfrom maintaining the link.  相似文献   
34.
35.
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning.  相似文献   
36.
Archibald T. Strong, born in Melbourne, was the son of an Australian scholar who went to an academic post at Liverpool. The younger Strong received his secondary and tertiary education in England. There, he became proficient in modern European languages and literature. He initially planned a career in the law, but for health reasons returned to Australia to the Department of English at the University of Melbourne. Prior to the First World War, Strong became prominent in Melbourne literary circles and also a prolific commentator on world affairs. As an early member of the Round Table group in Australia, Strong assessed Imperial Germany as posing an existential threat to the British Empire and hence to Australia's security. The nation's future, he believed, lay in unwavering defence of the Empire. Strong evinced a distinct impatience with fellow citizens, especially on the socialist left, who failed, in his view, to understand the realities of Australia's position in the world and what was at stake in the Great War.  相似文献   
37.
Decomposition studies were conducted using two carcasses of domestic pigs, Sus scrofa L., 8.4 kg and 15.1 kg in weight, to determine the effects of carcass size on the rate of decomposition, composition of the arthropod fauna, and succession patterns. A total of 46 arthropod taxa were recovered during this study. No size-related differences were observed between carcasses with respect to composition of the arthropod fauna or patterns of succession. A greater number of arthropods were observed attracted to the 15.1-kg carcass, and the rate of decomposition observed was more rapid for the 15.1-kg carcass than for the 8.4-kg carcass. Internal temperatures of the 8.4-kg carcass were more directly related to external ambient temperatures during the fresh and bloated stages of decomposition. During the decay stage, both carcasses generated internal temperatures significantly above ambient temperatures. Following this stage, internal temperatures fell to approximate ambient temperatures during the postdecay and remains stages.  相似文献   
38.
Data on 63 cases of subcapsular spleen lesions are analyzed. Circumstances of trauma infliction period of the 2-nd stage of spleen capsule rupture, morphological types of subcapsular spleen lesions, microscopic changes in different posttraumatic periods are presented.  相似文献   
39.
40.
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