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   18664篇
  免费   520篇
各国政治   743篇
工人农民   804篇
世界政治   1464篇
外交国际关系   640篇
法律   11366篇
中国共产党   2篇
中国政治   87篇
政治理论   3899篇
综合类   179篇
  2020年   216篇
  2019年   255篇
  2018年   420篇
  2017年   436篇
  2016年   510篇
  2015年   314篇
  2014年   348篇
  2013年   1708篇
  2012年   530篇
  2011年   510篇
  2010年   357篇
  2009年   397篇
  2008年   458篇
  2007年   479篇
  2006年   461篇
  2005年   749篇
  2004年   496篇
  2003年   441篇
  2002年   394篇
  2001年   705篇
  2000年   620篇
  1999年   517篇
  1998年   289篇
  1997年   247篇
  1996年   210篇
  1995年   206篇
  1994年   251篇
  1993年   221篇
  1992年   358篇
  1991年   390篇
  1990年   353篇
  1989年   377篇
  1988年   341篇
  1987年   358篇
  1986年   362篇
  1985年   352篇
  1984年   299篇
  1983年   332篇
  1982年   260篇
  1981年   244篇
  1980年   184篇
  1979年   259篇
  1978年   178篇
  1977年   149篇
  1976年   135篇
  1975年   135篇
  1974年   157篇
  1973年   133篇
  1972年   129篇
  1971年   113篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
191.
Nash JM 《Time》1992,139(14):24
  相似文献   
192.
193.
194.
195.
This paper provides a brief biography of Luke S. May (1886-1965), whose pioneering work in forensic science in the United States has not received full recognition. May began as a private detective in Salt Lake City, Utah, shortly after the turn of the century and later established his own agency, the Revelare International Secret Service, which he moved to Seattle, Washington, in 1919. Although basically self-taught in scientific matters, May built a solid reputation among police agencies and attorneys in the Pacific Northwest and Western Canada as a serious and effective scientific investigator in the era before public crime laboratories. This reputation as "America's Sherlock Holmes" also led to his being consulted on the establishment of the first American crime laboratory at Northwestern University in Chicago, Illinois, and on a laboratory for the Royal Canadian Mounted Police at Regina, in Saskatchewan, Canada. He contributed to a landmark case of court acceptance of toolmark identification, invented specialized instruments, and founded an institute to teach scientific criminal investigation to police officers. His earliest associates were John L. Harris and J. Clark Sellers, both of whom became recognized document examiners on the West Coast and were followed by a second and a third generation of practitioners.  相似文献   
196.
A new structure of conclusions including special chapter "Conclusion validity", which ensures their high availability for officials of legal investigation agencies is suggested. The examples of conclusion making on the basis of new form in case of blood, secretion and hair tests performed in two variants (known and unknown criminal) are presented.  相似文献   
197.
198.
199.
In this article we examine how increasing the reimbursement of physicians and expanding Medicaid eligibility affect access to care for children in Cook County, Illinois, which overlies Chicago. Using Medicaid claims and other data at the zip-code level, we compare the places where Medicaid children live with the places where all the physicians who treat children and those who accept Medicaid patients have their practices. Our findings suggest that the recent changes in legislation are unlikely to benefit extremely poor children, who are more likely to live in depressed inner-city areas, where there are few physicians. "Near-poor" children whose homes are dispersed throughout the county, who are now eligible for Medicaid as a result of the recent changes, are likely to see improvements in their access to care. Further changes in policy, aimed at enhancing the capacity of institutions providing care, could improve access for the children of the inner city.  相似文献   
200.
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