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   74876篇
  免费   3013篇
各国政治   4552篇
工人农民   3047篇
世界政治   6430篇
外交国际关系   3890篇
法律   37143篇
中国共产党   11篇
中国政治   769篇
政治理论   21098篇
综合类   949篇
  2021年   417篇
  2020年   1183篇
  2019年   1535篇
  2018年   1783篇
  2017年   2069篇
  2016年   2264篇
  2015年   1861篇
  2014年   2122篇
  2013年   10586篇
  2012年   1793篇
  2011年   1932篇
  2010年   1920篇
  2009年   2142篇
  2008年   1923篇
  2007年   1937篇
  2006年   2118篇
  2005年   1981篇
  2004年   1863篇
  2003年   1638篇
  2002年   1717篇
  2001年   2053篇
  2000年   1760篇
  1999年   1529篇
  1998年   1196篇
  1997年   1036篇
  1996年   1018篇
  1995年   989篇
  1994年   992篇
  1993年   1009篇
  1992年   1156篇
  1991年   1187篇
  1990年   1130篇
  1989年   1121篇
  1988年   1126篇
  1987年   1115篇
  1986年   1159篇
  1985年   1185篇
  1984年   1070篇
  1983年   1075篇
  1982年   930篇
  1981年   873篇
  1980年   701篇
  1979年   804篇
  1978年   630篇
  1977年   561篇
  1976年   514篇
  1975年   452篇
  1974年   478篇
  1973年   463篇
  1972年   398篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
401.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses.  相似文献   
402.
403.
404.
Proposals to ration health care in the United States meet a number of objections, symbolic and literal. Nonetheless, an acceptance of the idea of rationing is a necessary first step toward universal health insurance. It must be understood that universal health care requires an acceptance of rationing, and that such an acceptance must precede enactment of a program, if it is to be economically sound and politically feasible. Commentators have argued that reform of the health care system should come before any effort to ration. On the contrary, rationing and reform cannot be separated. The former is the key to the latter, just as rationing is the key to universal health insurance.  相似文献   
405.
406.
407.
408.
409.
410.
On January 1, 1996, a new law took effect in Texas granting certain state citizens the privilege to carry a concealed handgun on their person for the first time since 1871. As a result of this dramatic shift in state law, Texas is now among the growing number of states across the nation who have adopted similar statutory provisions in one form or another. While at least one empiricals study of citizen’s attitudes toward concealed handgun ownership was conducted prior to the law’s effective date, no similar efforts were undertakens to assess the beliefs, perceptions and attitudes of the state’s law enforcement officers about this important social policy. The present study was therefore undertaken in response to the lack of serious attention which the issue of concealed handgun ownership among private citizens has received as it directly relates to the law enforcement profession. Subjects for this study (N=327) were drawn from four Texas law enforcement agencies representing various organizational sizes and missions. While the responses of officers who participated in the study indicate optimism about the law’s potential to deter various types of crime, they also reflect a certain degree of concerns about concealed handgun ownership among private citizens especially as this policy directly relates to perceive inadequacies in statemandated requirements and issues affecting officer safety.  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