全文获取类型
收费全文 | 33025篇 |
免费 | 1544篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 1269篇 |
工人农民 | 1348篇 |
世界政治 | 2090篇 |
外交国际关系 | 1233篇 |
法律 | 20623篇 |
中国共产党 | 136篇 |
中国政治 | 729篇 |
政治理论 | 5876篇 |
综合类 | 1270篇 |
出版年
2021年 | 199篇 |
2020年 | 571篇 |
2019年 | 623篇 |
2018年 | 800篇 |
2017年 | 843篇 |
2016年 | 907篇 |
2015年 | 725篇 |
2014年 | 847篇 |
2013年 | 3134篇 |
2012年 | 896篇 |
2011年 | 1184篇 |
2010年 | 1157篇 |
2009年 | 1183篇 |
2008年 | 1127篇 |
2007年 | 1055篇 |
2006年 | 1081篇 |
2005年 | 938篇 |
2004年 | 908篇 |
2003年 | 758篇 |
2002年 | 757篇 |
2001年 | 1194篇 |
2000年 | 1065篇 |
1999年 | 856篇 |
1998年 | 430篇 |
1997年 | 332篇 |
1996年 | 354篇 |
1995年 | 347篇 |
1994年 | 355篇 |
1993年 | 342篇 |
1992年 | 568篇 |
1991年 | 586篇 |
1990年 | 580篇 |
1989年 | 583篇 |
1988年 | 600篇 |
1987年 | 551篇 |
1986年 | 608篇 |
1985年 | 614篇 |
1984年 | 502篇 |
1983年 | 467篇 |
1982年 | 339篇 |
1981年 | 304篇 |
1980年 | 275篇 |
1979年 | 378篇 |
1978年 | 220篇 |
1977年 | 210篇 |
1976年 | 189篇 |
1975年 | 181篇 |
1974年 | 228篇 |
1973年 | 178篇 |
1972年 | 169篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
181.
182.
A simple and rapid method is described for processing organ and water samples for the identification of diatoms so that they can be studied and recorded for taxonomic and diagnostic purposes. Samples are treated with concentrated nitric acid; the fluid obtained is centrifuged, and its sediment is dried, coated, and examined under the scanning electron microscope. The method does not alter the morphology of diatoms and allows the study of freshwater and seawater species present in the organs of bodies found in the water, making possible the diagnosis of drowning under specific conditions. 相似文献
183.
R. Alan Thompson 《Journal of Police and Criminal Psychology》1997,12(1):61-69
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
184.
185.
186.
Cheldelin Sandra Greenberg Melanie Honeyman Christopher Volpe Maria R. 《Negotiation Journal》2003,19(1):65-67
Negotiation Journal - 相似文献
187.
Book Reviews in This Article:
Getting Rid of Patients: Contradictions in the Socialization of Physicians . By Terry Mizrahi
Physicians and Social Change . By John Colombotos and Corinne Kirchner
Changing Values in Medicine . Edited by Eric J. Cassell and Mark Siegler
Professional Ethics and Primary Care Medicine: Beyond Dilemmas and Decorum . By Harmon L. Smith and Larry R. Churchill
Physician—Patient Decision-Making: A Study in Medical Ethics . By Douglas N. Walton
With Dignity: The Search for Medicare and Medicaid . By Sheri I. David
The Dismissal of Students with Mental Disorders. Legal Issues, Policy Considerations, and Alternative Responses .
Courtroom Toxicology . By Marshall Houts, Randall C. Baselt, and Robert H. Cravey 相似文献
Getting Rid of Patients: Contradictions in the Socialization of Physicians . By Terry Mizrahi
Physicians and Social Change . By John Colombotos and Corinne Kirchner
Changing Values in Medicine . Edited by Eric J. Cassell and Mark Siegler
Professional Ethics and Primary Care Medicine: Beyond Dilemmas and Decorum . By Harmon L. Smith and Larry R. Churchill
Physician—Patient Decision-Making: A Study in Medical Ethics . By Douglas N. Walton
With Dignity: The Search for Medicare and Medicaid . By Sheri I. David
The Dismissal of Students with Mental Disorders. Legal Issues, Policy Considerations, and Alternative Responses .
Courtroom Toxicology . By Marshall Houts, Randall C. Baselt, and Robert H. Cravey 相似文献
188.
189.
190.