全文获取类型
收费全文 | 2000篇 |
免费 | 58篇 |
专业分类
各国政治 | 167篇 |
工人农民 | 68篇 |
世界政治 | 117篇 |
外交国际关系 | 75篇 |
法律 | 1315篇 |
中国政治 | 24篇 |
政治理论 | 279篇 |
综合类 | 13篇 |
出版年
2023年 | 13篇 |
2022年 | 12篇 |
2021年 | 12篇 |
2020年 | 48篇 |
2019年 | 43篇 |
2018年 | 67篇 |
2017年 | 82篇 |
2016年 | 78篇 |
2015年 | 37篇 |
2014年 | 45篇 |
2013年 | 238篇 |
2012年 | 56篇 |
2011年 | 68篇 |
2010年 | 50篇 |
2009年 | 47篇 |
2008年 | 55篇 |
2007年 | 53篇 |
2006年 | 49篇 |
2005年 | 57篇 |
2004年 | 49篇 |
2003年 | 56篇 |
2002年 | 45篇 |
2001年 | 64篇 |
2000年 | 51篇 |
1999年 | 49篇 |
1998年 | 16篇 |
1997年 | 14篇 |
1996年 | 19篇 |
1995年 | 12篇 |
1994年 | 13篇 |
1993年 | 12篇 |
1992年 | 29篇 |
1991年 | 32篇 |
1990年 | 37篇 |
1989年 | 39篇 |
1988年 | 36篇 |
1987年 | 26篇 |
1986年 | 38篇 |
1985年 | 27篇 |
1984年 | 20篇 |
1983年 | 18篇 |
1982年 | 12篇 |
1981年 | 18篇 |
1979年 | 19篇 |
1978年 | 21篇 |
1977年 | 17篇 |
1971年 | 18篇 |
1970年 | 17篇 |
1968年 | 17篇 |
1967年 | 12篇 |
排序方式: 共有2058条查询结果,搜索用时 15 毫秒
41.
A controlled laboratory experiment is described, in principle and practice, which can be used for the of determination the rate of tissue decomposition in soil. By way of example, an experiment was conducted to determine the effect of temperature (12 degrees, 22 degrees C) on the aerobic decomposition of skeletal muscle tissue (Organic Texel x Suffolk lamb (Ovis aries)) in a sandy loam soil. Measurements of decomposition processes included muscle tissue mass loss, microbial CO2 respiration, and muscle tissue carbon (C) and nitrogen (N). Muscle tissue mass loss at 22 degrees C always was greater than at 12 degrees C (p < 0.001). Microbial respiration was greater in samples incubated at 22 degrees C for the initial 21 days of burial (p < 0.01). All buried muscle tissue samples demonstrated changes in C and N content at the end of the experiment. A significant correlation (p < 0.001) was demonstrated between the loss of muscle tissue-derived C (Ct) and microbially-respired C (Cm) demonstrating CO2 respiration may be used to predict mass loss and hence biodegradation. In this experiment Q10 (12 degrees C-22 degrees C) = 2.0. This method is recommended as a useful tool in determing the effect of environmental variables on the rate of decomposition of various tissues and associated materials. 相似文献
42.
43.
E. Acar O. Bulbul G. Rayimoglu M.S. Shahzad D. Argac H. Altuncul G. Filoglu 《Forensic Science International: Genetics Supplement Series》2009,2(1):47-48
The use of ChrX-STRs is enormous in forensic case as these have proven to be powerful tools, mainly in deficiency paternity cases when the disputed child is female, and also some special cases involving blood relatives, incest cases, fetal typing in abortion material. The Mentype® Argus X-8 kit is a commercial multiplex system which contains Amelogenin for gender determination as well as gonosomal STR markers (DXS8378, HPRTB, DXS7423, DXS7132, DXS10134, DXS10074, DXS10101 and DXS10135). Validation studies were being performed on blood obtained from the volunteers in Turkish population. In this study, some parameters were taken under consideration for validation like DNA extraction using different protocols, quantitated by using commercially available Invitrogen Qubit Fluorometer, reaction volume validation of Master Mix and the analysis of female/male, female/female and male/male mixtures were performed. The conditions were optimized and validated using GenAmp 9700 and reducing reaction volume from 25 μl to 12.5 μl and 6.5 μl. After reducing the total volume of the reaction, the results were same and there was no effect on peak height and quality when analyzed on ABI 310 genetic analyzer. 2 paternity cases were also performed which gave the same power of discrimination as has been mentioned in Mentype® Argus X-8 kit. 相似文献
44.
Joseph P. Daly David R. Williams Stephen J. O’Connor Richard W. Pouder 《Social Justice Research》2009,22(4):335-350
There is a controversy in the justice literature as to whether interpersonal aspects of justice are best represented as one
construct (interactional justice) or two (interpersonal justice and informational justice). Using confirmatory factor analysis,
we tested competing models of these constructs on a sample of healthcare consumers (n = 1919) with respect to their justice judgments of primary care physicians. We found that the single factor model (interactional
justice) represented a better fit to the data. Our results do not necessarily contradict those of prior studies that have
found a better fit for a bi-dimensional model in organizational settings, however. Instead, we are suggesting a contingency
approach: the results may be due in part to the halo effect, which may manifest itself where consumers are unfamiliar with
the service provider and with the complexities of that person’s role. 相似文献
45.
46.
Law enforcement agencies and institutions of higher education have confronted increasing numbers of violent and destructive campus riots and disturbances over the past decade. Problematic is the fact that these riots typically have no underlying cause, other than students’ quest for excitement. Responding to gaps in the empirical literature about these events, this study used data from two waves of surveys to systematically examine those involved in a recurring problem event in a college town that was subject to a police crackdown. The analyses drew on survey responses from over eight hundred event participants in 2002 and 2003, and the results revealed that increased enforcement had a significant effect on crowd composition, including the gender and race of participants, repeat visitors, out-of-town participants, and perceptions about the subjects' overall experience. Implications for law enforcement and community strategies to decrease the size and destructiveness of such problem events are outlined. 相似文献
47.
Some causes of ineffective dental care because of the patient's negligence were analyzed. In 16 cases the patients ignored recommendations of the dentist and missed visits to the doctor. As a result, the patients developed complications leading to esthetic dissatisfaction, prolonged treatment, repeated prosthetic management. 相似文献
48.
49.
James O. Finckenauer 《Trends in Organized Crime》2005,8(3):63-83
What do most people, or at least most Americans, think of when they hear, see, or read the term “organized crime”? What do they know about it? And from whence do they get their information? What about law enforcement practitioners, prosecutors, judges, and politicians? And, what about academics and journalists, the folks who study and write about organized crime? Agreeing upon a commonly accepted definition of just what is organized crime has been a continuing problem for both research and policy. The discussion that follows addresses various dimensions of this problem, looks at the implications, and makes certain recommendations. 相似文献
50.
This paper explores the multi-layered representations of violence and crime in the recent Hollywood film Gangs of New York [Scorcese (2003) Miramax]. We use our exploration of this film to suggest that popular culture, even through its most mainstream products, can be seen as a critical criminological space where alternative views of law, crime and the state are made available. Rather than understanding Hollywood movies simply as vehicles for disseminating conventional mores, we suggest that they can furnish critical (and complex) points of view on law and crime and that the project of a critical criminology can be strengthened by engaging more forthrightly with these ubiquitous cultural forms. 相似文献