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   16506篇
  免费   555篇
  国内免费   5篇
各国政治   688篇
工人农民   738篇
世界政治   1090篇
外交国际关系   568篇
法律   10623篇
中国共产党   7篇
中国政治   167篇
政治理论   3010篇
综合类   175篇
  2020年   229篇
  2019年   276篇
  2018年   340篇
  2017年   397篇
  2016年   399篇
  2015年   300篇
  2014年   312篇
  2013年   1516篇
  2012年   460篇
  2011年   481篇
  2010年   398篇
  2009年   421篇
  2008年   505篇
  2007年   544篇
  2006年   520篇
  2005年   471篇
  2004年   465篇
  2003年   492篇
  2002年   427篇
  2001年   668篇
  2000年   543篇
  1999年   478篇
  1998年   245篇
  1997年   168篇
  1996年   201篇
  1995年   174篇
  1994年   196篇
  1993年   198篇
  1992年   323篇
  1991年   355篇
  1990年   340篇
  1989年   281篇
  1988年   321篇
  1987年   271篇
  1986年   317篇
  1985年   280篇
  1984年   230篇
  1983年   218篇
  1982年   176篇
  1981年   193篇
  1980年   127篇
  1979年   171篇
  1978年   122篇
  1977年   106篇
  1976年   96篇
  1975年   123篇
  1974年   132篇
  1973年   103篇
  1972年   99篇
  1969年   98篇
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
991.
992.
993.
The relationship of police patrol-car staffing to response time is examined. The first systematic study of police patrol-car staffing, conducted in San Diego in 1977, found that two one-officer cars responded to the scene of an incident faster than one two-officer car. Given the study design, this finding was puzzling. When two one-officer cars are dispatched, at least one of the cars has farther to go, and the extra travel distance should require extra travel time. The present study replicated the previous empirical analysis with data from the Kansas City Response Time Analysis Study. Although it was expected that additional control variables would provide an explanation for the findings, the results were the same. Two one-officer cars are faster than one two-officer car. One explanation for this finding is that peer pressure among officers provides different incentives for rapid response in one- and two-officer cars. The policy implication is that the deployment of two-officer cars cannot be justified by minimized response time.  相似文献   
994.
Autopsy cases of deaths from handgun wounds were studied. Survival times were estimated from time of the incident until the time of pronouncement on police reports. Two groups were apparent--short-term and non-short-term survivors. These groups were compared statistically with respect to age, race, sex, Spanish surname, alcohol, drugs detected at autopsy, caliber of projectile, frequency of shots, and location of injury.  相似文献   
995.
The influence of crime among the elderly was investigated in this study. The study suggests that crime prevention programs among the elderly should be implemented with some reservations. Since the risks of criminal victimization are low among the elderly, it may not be possible to reduce those rates much further, even with elaborate security programs for the elderly. On the contrary, raising the salience of crime by placing great emphasis on preventive behavior may well foster social isolation among the elderly.  相似文献   
996.
997.
998.
For many years economists writing on the delivery of health services dusted off the traditional promarket analyses of textbooks and applied them uncritically to the health care industry. Specialists in health care today are far more cautious. From the medical side there has been an increasing interest in the economic implications of health care organization and medical practice. Good research drawing on the skills of economists and other specialists is rapidly growing. This research offers little support either to those who reason abstractly from a market ideology or to those who are uncritically committed to socialized health care.  相似文献   
999.
1000.
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