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   16619篇
  免费   531篇
  国内免费   5篇
各国政治   668篇
工人农民   739篇
世界政治   1094篇
外交国际关系   555篇
法律   10696篇
中国共产党   6篇
中国政治   156篇
政治理论   3066篇
综合类   175篇
  2020年   225篇
  2019年   278篇
  2018年   342篇
  2017年   399篇
  2016年   405篇
  2015年   301篇
  2014年   308篇
  2013年   1520篇
  2012年   459篇
  2011年   482篇
  2010年   393篇
  2009年   416篇
  2008年   505篇
  2007年   550篇
  2006年   521篇
  2005年   477篇
  2004年   465篇
  2003年   490篇
  2002年   421篇
  2001年   668篇
  2000年   548篇
  1999年   480篇
  1998年   244篇
  1997年   168篇
  1996年   204篇
  1995年   177篇
  1994年   203篇
  1993年   198篇
  1992年   325篇
  1991年   357篇
  1990年   342篇
  1989年   292篇
  1988年   329篇
  1987年   273篇
  1986年   324篇
  1985年   282篇
  1984年   233篇
  1983年   219篇
  1982年   178篇
  1981年   191篇
  1980年   128篇
  1979年   174篇
  1978年   124篇
  1977年   106篇
  1976年   99篇
  1975年   125篇
  1974年   132篇
  1973年   104篇
  1972年   100篇
  1969年   99篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Stab wounds were made in parenchymatous organs (e.g. liver, spleen, kidneys, lungs) using a variety of instruments. The shape of the resulting canal was investigated by X-ray analysis after introduction of an X-ray contrast medium. The best contrast was obtained using a contrast medium containing barium. The shape of the canal gave a direct representation of the outline of the instrument used. The width of the canal was however, always several millimeters smaller than the corresponding blade of the instrument. The position of the blade back in single-edged blades could be demonstrated with stronger contrast.  相似文献   
13.
14.
15.
16.
This article summarizes some of the literature reviewed by the Girls Study Group, which is a federally funded project aimed at assessing the causes of girls’ delinquency as well as evaluating programs to address it. The literature reveals that a number of factors such as family dysfunction, involvement with antisocial peers, and living in disadvantaged neighborhoods are correlated with delinquency for both boys and girls. Some factors, however, are gender sensitive, meaning that either girls are more exposed to a given risk factor than boys or react somewhat differently to a given risk factor. Girls have higher rates of exposure to sexual assault, which is associated with delinquency and, although more research is needed, they are more affected by the impacts of early puberty, when it is coupled with harsh parenting and disadvantaged neighborhoods. This article discusses some implications of the research on correlates of delinquency for programming for girls and makes recommendations for program selection.  相似文献   
17.
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   
18.
19.
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   
20.
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   
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