全文获取类型
收费全文 | 8452篇 |
免费 | 479篇 |
专业分类
各国政治 | 355篇 |
工人农民 | 364篇 |
世界政治 | 474篇 |
外交国际关系 | 257篇 |
法律 | 6035篇 |
中国政治 | 42篇 |
政治理论 | 1365篇 |
综合类 | 39篇 |
出版年
2020年 | 157篇 |
2019年 | 166篇 |
2018年 | 256篇 |
2017年 | 221篇 |
2016年 | 296篇 |
2015年 | 217篇 |
2014年 | 184篇 |
2013年 | 751篇 |
2012年 | 272篇 |
2011年 | 247篇 |
2010年 | 213篇 |
2009年 | 241篇 |
2008年 | 172篇 |
2007年 | 168篇 |
2006年 | 180篇 |
2005年 | 539篇 |
2004年 | 275篇 |
2003年 | 177篇 |
2002年 | 147篇 |
2001年 | 324篇 |
2000年 | 251篇 |
1999年 | 234篇 |
1998年 | 98篇 |
1997年 | 66篇 |
1996年 | 72篇 |
1995年 | 80篇 |
1994年 | 86篇 |
1993年 | 87篇 |
1992年 | 168篇 |
1991年 | 171篇 |
1990年 | 170篇 |
1989年 | 181篇 |
1988年 | 145篇 |
1987年 | 158篇 |
1986年 | 149篇 |
1985年 | 150篇 |
1984年 | 112篇 |
1983年 | 130篇 |
1982年 | 83篇 |
1981年 | 79篇 |
1980年 | 58篇 |
1979年 | 117篇 |
1978年 | 77篇 |
1977年 | 61篇 |
1975年 | 58篇 |
1974年 | 73篇 |
1973年 | 67篇 |
1972年 | 56篇 |
1971年 | 54篇 |
1968年 | 51篇 |
排序方式: 共有8931条查询结果,搜索用时 46 毫秒
211.
Sophia K. Chiu M.D. M.P.H. Jessica F. Li M.S.P.H. Kurt B. Nolte M.D. 《Journal of forensic sciences》2020,65(4):1324-1327
Recent increases in deaths in the United States from synthetic opioids such as fentanyl and fentanyl analogues (fentanyls) have raised concerns about possible occupational exposures to these potent agents. Medicolegal death investigators and autopsy suite staff might perform job tasks involving exposure to fentanyls. The potential for exposure to fentanyls among medicolegal death investigators and autopsy technicians at a state medical examiner's office was evaluated through review of caseload characteristics, injury and illness logs, and procedures and policies and discussions with management and employee representatives. The evaluation showed that this medical examiner's office had low potential for work-related exposure to fentanyls; its standard operating procedures and personal protective equipment requirements should reduce the potential for occupational exposure. Medicolegal death investigation agencies can develop and implement guidance to control exposures and provide workforce education and training to reduce the potential for work-related exposure to fentanyls. 相似文献
212.
Zo? Hammatt 《法庭科学研究(英文)》2021,6(4):281-282
The Singapore Statement on Research Integrity, articulated during the 2nd World Conference on Research Integrity in 2010, encompasses principles that apply to all research endeavours, including the various disciplines that comprise the field of forensic science Singapore Statement on Research Integrity (2010) (https://wcrif.org/guidance/singapore-statement). Cases of research misconduct and breaches of research integrity in any field undermine the trustworthiness of research and make it difficult if not impossible for others to rely upon and replicate research results. Moreover, problems in the research environment, whether in the academic, public, or private sector, can include bullying and harassment, discrimination, abuse of power and corruption, as well as competitive pressures related to employment and status. 相似文献
213.
214.
Raymond B. Firehock John A. Gentry Julia W. Rogers James M. Simon Jr 《Intelligence & National Security》2018,33(5):774-783
The literature on intelligence analysis contains many references to the ‘review process’, the mechanism by which analysts’ drafts are converted into corporate products. Analysts whose drafts consistently navigate the process quickly and smoothly are regarded as star performers. Divining the practical meaning of organizational definitions of ‘good’ analysis and the personal preferences of specific senior reviewers is not easy, however. Analysts occasionally commit their understanding of reviewers’ stylistic preferences to paper, effectively providing style guides to help others. This essay presents and explains the development and implications of one such guide, which was designed to help analysts in CIA’s Office of Strategic Research in the early 1970s. 相似文献
215.
Throughout his career as a literary critic, Alfred Kazin wrote often and with sympathy and insight about Theodore Dreiser, one of the most powerful, panoramic, and compassionate novelists in American literary history. Kazin was an intense reader and writer, committed in his books, essays, and reviews to connecting with and describing the personality of each author he examined. His interpretive work on Dreiser illuminates what it means to be a literary critic and teacher. When we read Kazin in the midst of twenty-first century theory, ideology, and professionalism, we realize all the more clearly the goal in his literary criticism that he aimed for, achieved, and represented—and that now is missing from literary education and experience. 相似文献
216.
What Levels of Racial Diversity Can Be Achieved with Socioeconomic‐Based Affirmative Action? Evidence from a Simulation Model 下载免费PDF全文
Sean F. Reardon Rachel Baker Matt Kasman Daniel Klasik Joseph B. Townsend 《Journal of policy analysis and management》2018,37(3):630-657
This paper investigates to what extent socioeconomic status (SES)‐based affirmative action in college admissions can produce racial diversity. Using simulation models, we investigate the racial and socioeconomic distribution of students among colleges under the use of race‐ or SES‐based affirmative action policies, or targeted, race‐based recruitment policies. We find, first, that neither SES‐based affirmative action nor race‐targeted recruiting on their own produce levels of racial diversity achieved by race‐based affirmative action. However, the two policies in combination, although likely expensive, may yield racial diversity comparable to race‐based affirmative action. Second, the use of affirmative action policies by some colleges reduces the diversity of similar‐quality colleges without such policies. Third, the combination of SES‐based affirmative action and race recruiting results in fewer academically‐overmatched Black and Hispanic students than under race‐based affirmative action, but the schools that use both also see a reduction in the academic achievement of enrolled students. 相似文献
217.
Which European Union actors are most powerful in the governance of the euro crisis? The euro crisis has reignited the classic debate between intergovernmentalists, who tend to stress the coercive power of dominant member states in the European Council, and supranationalists, who maintain that through the use of institutional power, the Commission, and the European Central Bank turned out the “winners” of the crisis. This article argues that euro crisis governance is best understood not just in terms of one form of power but instead as evolving through different constellations of coercive, institutional, and ideational power that favored different EU actors over the course of the crisis, from the initial fast‐burning phase (2010–2012), where the coercive and ideational power of Northern European member states in the European Council was strongest, to the slow‐burning phase (2012–2016), when greater influence was afforded supranational actors through the use of ideational and institutional power. 相似文献
218.
Philip B. Whyman 《The Political quarterly》2018,89(2):298-305
It is becoming increasingly accepted, not least by the Prime Minister and opposition leadership, that the negotiation of a comprehensive trade relationship with the EU is necessary to prevent the UK economy falling off a ‘cliff edge’. This concern is shaping the UK's strategy towards negotiations with the EU and has provided at least part of the motivation for the UK to consider requesting a transition period to facilitate the Brexit process. But how accurate are these fears? What evidence is there for the existence of a ‘cliff edge’? How disastrous would it be for the UK to revert to trading with the EU on the same basis as most other countries in the world, namely according to World Trade Organisation rules? This article seeks to address these issues and it highlights a number of implications for policy makers which flow from understanding the available evidence a little more clearly. 相似文献
219.
220.