全文获取类型
收费全文 | 16367篇 |
免费 | 522篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 659篇 |
工人农民 | 726篇 |
世界政治 | 1071篇 |
外交国际关系 | 539篇 |
法律 | 10579篇 |
中国共产党 | 6篇 |
中国政治 | 154篇 |
政治理论 | 2990篇 |
综合类 | 170篇 |
出版年
2020年 | 221篇 |
2019年 | 272篇 |
2018年 | 333篇 |
2017年 | 390篇 |
2016年 | 393篇 |
2015年 | 292篇 |
2014年 | 302篇 |
2013年 | 1477篇 |
2012年 | 446篇 |
2011年 | 476篇 |
2010年 | 391篇 |
2009年 | 411篇 |
2008年 | 499篇 |
2007年 | 539篇 |
2006年 | 517篇 |
2005年 | 466篇 |
2004年 | 457篇 |
2003年 | 487篇 |
2002年 | 417篇 |
2001年 | 663篇 |
2000年 | 539篇 |
1999年 | 477篇 |
1998年 | 242篇 |
1997年 | 168篇 |
1996年 | 201篇 |
1995年 | 172篇 |
1994年 | 197篇 |
1993年 | 195篇 |
1992年 | 322篇 |
1991年 | 356篇 |
1990年 | 340篇 |
1989年 | 285篇 |
1988年 | 321篇 |
1987年 | 273篇 |
1986年 | 319篇 |
1985年 | 280篇 |
1984年 | 231篇 |
1983年 | 219篇 |
1982年 | 176篇 |
1981年 | 191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 | 100篇 |
1969年 | 98篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
A R Copeland 《The American journal of forensic medicine and pathology》1985,6(2):175-179
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
962.
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
963.
964.
965.
A J Culyer 《Journal of policy analysis and management》1983,2(3):386-402
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
966.
967.
968.
969.
When social scientists participate in advocacy proceedings as expert witnesses, they find themselves subjected to pressures beyond those of scientific quality. This paper considers a range of problems when the demands of scientific merit interact with the exigencies of vigorous advocacy and suggests some rough guidelines for expert testimony. 相似文献
970.