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   11477篇
  免费   343篇
各国政治   478篇
工人农民   411篇
世界政治   786篇
外交国际关系   381篇
法律   7055篇
中国政治   73篇
政治理论   2541篇
综合类   95篇
  2020年   133篇
  2019年   189篇
  2018年   226篇
  2017年   262篇
  2016年   253篇
  2015年   203篇
  2014年   214篇
  2013年   1116篇
  2012年   241篇
  2011年   304篇
  2010年   229篇
  2009年   299篇
  2008年   296篇
  2007年   305篇
  2006年   295篇
  2005年   267篇
  2004年   257篇
  2003年   269篇
  2002年   269篇
  2001年   437篇
  2000年   383篇
  1999年   310篇
  1998年   174篇
  1997年   136篇
  1996年   147篇
  1995年   136篇
  1994年   148篇
  1993年   142篇
  1992年   240篇
  1991年   257篇
  1990年   249篇
  1989年   253篇
  1988年   228篇
  1987年   226篇
  1986年   267篇
  1985年   260篇
  1984年   231篇
  1983年   218篇
  1982年   153篇
  1981年   129篇
  1980年   116篇
  1979年   152篇
  1978年   87篇
  1977年   113篇
  1976年   98篇
  1975年   72篇
  1974年   90篇
  1973年   84篇
  1972年   78篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
111.
112.
113.
114.
A new form of joyride known as "car surfing" with fatal results is documented. The possible role of this activity in extra-vehicular motor vehicle deaths involving teenage or youthful drivers is described. Potential scene and autopsy findings are discussed.  相似文献   
115.
116.
117.
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   
118.
119.
The Iran-Contra affair is an example of the type of event that is expected to give rise to a rally of public opinion behind the president. However, the public's response to this event, uncharacteristically, was a sharp decrease in support for President Reagan. This case study constitutes an attempt to explore the sources of the public opinion response to foreign policy events. Statements of political elites, news coverage and commentary, and public opinion assessments are examined to test the patriotism, priming, and opinion leadership explanations of the rally phenomenon. The actions of opinion leaders appears to provide the best explanation of the differential public response to the Iran-Contra affair.  相似文献   
120.
A study of 82 suicides during 1982-1986 that were committed by jumping from buildings was performed using the case files of the Office of the Medical Examiner of Metropolitan Dade County in Miami, Florida, U.S.A. The analysis involved the age, race, and sex of the victim along with the results of toxicologic studies and the cause of death. Additionally, the decedent's place of residence, location of the suicide, height of the building, and the reason for the suicide were investigated. Whether or not a note was left by the decedent was also ascertained. The suicidal "jumper" most commonly was a white man who was greater than 60 years of age who died from the resultant multiple injuries. The victim commonly was sober and drug free at the time of the incident. In approximately two-thirds of the cases, the location of the suicide was the victim's residence, which frequently was an apartment or condominium-type dwelling that was seven floors or higher from the ground. The victim often had experienced depression prior to the incident and did not usually leave a suicide note. This article compares the Dade County cases with others that have been studied and discusses the reasons why jumping from a building may have been chosen as the suicidal mechanism.  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