全文获取类型
收费全文 | 10697篇 |
免费 | 294篇 |
专业分类
各国政治 | 507篇 |
工人农民 | 308篇 |
世界政治 | 678篇 |
外交国际关系 | 394篇 |
法律 | 6967篇 |
中国共产党 | 1篇 |
中国政治 | 52篇 |
政治理论 | 1979篇 |
综合类 | 105篇 |
出版年
2020年 | 107篇 |
2019年 | 132篇 |
2018年 | 195篇 |
2017年 | 213篇 |
2016年 | 229篇 |
2015年 | 172篇 |
2014年 | 196篇 |
2013年 | 1038篇 |
2012年 | 278篇 |
2011年 | 297篇 |
2010年 | 225篇 |
2009年 | 243篇 |
2008年 | 287篇 |
2007年 | 251篇 |
2006年 | 281篇 |
2005年 | 229篇 |
2004年 | 235篇 |
2003年 | 240篇 |
2002年 | 241篇 |
2001年 | 459篇 |
2000年 | 383篇 |
1999年 | 315篇 |
1998年 | 116篇 |
1997年 | 144篇 |
1996年 | 112篇 |
1995年 | 128篇 |
1994年 | 131篇 |
1993年 | 132篇 |
1992年 | 234篇 |
1991年 | 245篇 |
1990年 | 226篇 |
1989年 | 220篇 |
1988年 | 220篇 |
1987年 | 211篇 |
1986年 | 255篇 |
1985年 | 231篇 |
1984年 | 205篇 |
1983年 | 206篇 |
1982年 | 113篇 |
1981年 | 109篇 |
1980年 | 77篇 |
1979年 | 143篇 |
1978年 | 94篇 |
1977年 | 83篇 |
1976年 | 72篇 |
1975年 | 93篇 |
1974年 | 117篇 |
1973年 | 96篇 |
1972年 | 91篇 |
1971年 | 91篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
962.
963.
964.
Brigadier‐General Sir Percy Sykes Gold Medallist of the Royal Geographical Royal Empire Societies. K.C.I.E. C.B. C.M.G. 《亚洲事务》2013,44(2):300-312
This article concentrates almost entirely on the events of 1971 and the author's involvement in the “sometimes complicated and frustrating negotiations and consultations” which led up to the signing at the end of 1971 of the various Treaties of Friendship as Britain withdrew from the Gulf, leaving behind a number of independent states, including the United Arab Emirates. 相似文献
965.
Howard N. Snyder 《犯罪学与公共政策》2011,10(2):207-215
This address argues that some members of the criminology community must take upon themselves the responsibility of communicating the knowledge developed by the field to practitioners and decision makers. It is reasoned that only with such targeted dissemination will the full potential benefits from our work be realized. 相似文献
966.
Wesley G. Skogan 《犯罪学与公共政策》2011,10(4):987-990
967.
Carla Lewandowski Jeremy G. Carter Walter L. Campbell 《Police Practice and Research》2017,18(2):174-193
Information sharing research has largely focused on capturing operational practices related to the exchange of information. A noticeable shortcoming of this developing literature is the lack of scholarly attention focused specifically on analytic personnel. The present study employs semi-structured interviews with 23 personnel that comprise the analytic unit within a regional fusion center located in a large metropolitan area in the United States. Findings indicate that there is significant ambiguity surrounding the organizational and geographic audiences to which intelligence products should be tailored. Moreover, it appears information sharing is sparse and reliant upon personal relationships between analysts and external organizations. Lastly, analysts do not receive feedback pertaining to the content and effectiveness of intelligence products created. These findings may be generalized to other analytical organizations whose primary goal is to gather, analyze and disseminate intelligence. Action steps for policymakers are provided. 相似文献
968.
Eric N. Lindblom 《Housing Policy Debate》2013,23(3):957-1025
Abstract Because of the misery and deprivation suffered by homeless persons, the initial response to homelessness in the United States focused first on quickly addressing the dire need for emergency food and shelter, and then on providing additional assistance to already homeless persons—ideally to help them move out of homelessness. New preventive measures to help people avoid becoming homeless were largely ignored or put off.1 But now that efforts to provide emergency food and shelter are well under way throughout the country, many more experts, policymakers, and service organizations have begun focusing on homelessness prevention.2 Nevertheless, actual prevention efforts are still tentative and somewhat haphazard. In support of a more rapid expansion of effective homelessness‐prevention activities, this paper discusses the benefits of prevention, develops an initial framework for a comprehensive homelessness‐prevention strategy, and, using this framework, evaluates existing prevention efforts and suggests new initiatives. 相似文献
969.
Claire E.V. French Cynthia G. Jensen Susan K. Vintiner Douglas A. Elliot Susan R. McGlashan 《Forensic Science International Supplement Series》2008,178(1):1-6
There are a number of forensic cases in which the identification of the epithelial cell type from which DNA originated would provide important probative evidence. This study aimed to develop a technique using histological staining of fixed cells to distinguish between skin, buccal and vaginal epithelium. First, 11 different stains were screened on formalin-fixed, wax-embedded cells from five women. Samples were analysed qualitatively by examining staining patterns (colour) and morphology (absence or presence of nuclei). Three of the staining methods – Dane's, Csaba's and Ayoub-Shklar – were successful in distinguishing skin epithelial cells from buccal and vaginal. Second, cells were smeared directly onto slides, fixed with one of five fixatives and stained with one of the three stains mentioned above. Methanol fixation, coupled with the Dane's staining method, specific to keratin, was the only technique that distinguished between all three cell types. Skin cells stained magenta, red and orange and lacked nuclei; buccal cells stained predominantly orange–pink with red nuclei; while vaginal cells stained bright orange with orange nuclei and a blue extracellular hue. This staining pattern in vaginal cells was consistent in samples collected from 50 women aged between 18 and 67. Identification of cell type from unlabelled micrographs by 10 trained observers showed a mean success rate of 95%. The results of this study demonstrate that histological staining may provide forensic scientists with a technique for distinguishing between skin, buccal and vaginal epithelial cells and thus would enable more conclusive analyses when investigating sexual assault cases. 相似文献
970.
Managing incidental findings in human subjects research: analysis and recommendations. 总被引:8,自引:8,他引:0
Susan M Wolf Frances P Lawrenz Charles A Nelson Jeffrey P Kahn Mildred K Cho Ellen Wright Clayton Joel G Fletcher Michael K Georgieff Dale Hammerschmidt Kathy Hudson Judy Illes Vivek Kapur Moira A Keane Barbara A Koenig Bonnie S Leroy Elizabeth G McFarland Jordan Paradise Lisa S Parker Sharon F Terry Brian Van Ness Benjamin S Wilfond 《The Journal of law, medicine & ethics》2008,36(2):219-48, 211
No consensus yet exists on how to handle incidental findings (IFs) in human subjects research. Yet empirical studies document IFs in a wide range of research studies, where IFs are findings beyond the aims of the study that are of potential health or reproductive importance to the individual research participant. This paper reports recommendations of a two-year project group funded by NIH to study how to manage IFs in genetic and genomic research, as well as imaging research. We conclude that researchers have an obligation to address the possibility of discovering IFs in their protocol and communications with the IRB, and in their consent forms and communications with research participants. Researchers should establish a pathway for handling IFs and communicate that to the IRB and research participants. We recommend a pathway and categorize IFs into those that must be disclosed to research participants, those that may be disclosed, and those that should not be disclosed. 相似文献