全文获取类型
收费全文 | 11532篇 |
免费 | 569篇 |
专业分类
各国政治 | 442篇 |
工人农民 | 384篇 |
世界政治 | 845篇 |
外交国际关系 | 814篇 |
法律 | 7430篇 |
中国共产党 | 1篇 |
中国政治 | 64篇 |
政治理论 | 2076篇 |
综合类 | 45篇 |
出版年
2021年 | 67篇 |
2020年 | 203篇 |
2019年 | 243篇 |
2018年 | 243篇 |
2017年 | 304篇 |
2016年 | 312篇 |
2015年 | 254篇 |
2014年 | 314篇 |
2013年 | 1098篇 |
2012年 | 293篇 |
2011年 | 399篇 |
2010年 | 348篇 |
2009年 | 380篇 |
2008年 | 356篇 |
2007年 | 319篇 |
2006年 | 315篇 |
2005年 | 297篇 |
2004年 | 312篇 |
2003年 | 290篇 |
2002年 | 285篇 |
2001年 | 478篇 |
2000年 | 428篇 |
1999年 | 297篇 |
1998年 | 188篇 |
1997年 | 152篇 |
1996年 | 129篇 |
1995年 | 122篇 |
1994年 | 151篇 |
1993年 | 137篇 |
1992年 | 202篇 |
1991年 | 221篇 |
1990年 | 204篇 |
1989年 | 220篇 |
1988年 | 211篇 |
1987年 | 196篇 |
1986年 | 236篇 |
1985年 | 212篇 |
1984年 | 162篇 |
1983年 | 172篇 |
1982年 | 115篇 |
1981年 | 126篇 |
1980年 | 96篇 |
1979年 | 134篇 |
1978年 | 78篇 |
1977年 | 77篇 |
1976年 | 69篇 |
1974年 | 74篇 |
1973年 | 68篇 |
1972年 | 69篇 |
1970年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
The interpretation of bloodstain patterns at crime scenes has received increased attention in recent years. Important to an understanding of this is knowledge of the fundamentals of blood droplet formation and impact dynamics. A review of the literature reveals that a considerable amount of work has been done with aqueous drop dynamics. Workers in the forensic science area seem to have been unaware of this. In addition, some of the most important and comprehensive early work with blood droplet dynamics seems to have been forgotten. It is not cited in more recent publications dealing with bloodstain pattern interpretation. This literature is reviewed and discussed as well. The present study presents results of experiments with blood droplet dynamics and high-speed photographs of blood droplet impacts on stationary target surfaces. Some longstanding misconceptions of importance to forensic scientists engaged in crime scene reconstruction are discussed. 相似文献
943.
The patients at a state maximum security forensic facility were interviewed by a psychiatrist and their files reviewed. Only 43 of the 203 patients were judged to be suitable for the facility. Nearly 60% of the pretrial defendants were judged to be capable of proceeding to trial. Of the patients, 18% were judged to be malingering or avoiding trial or prison. The implications of these findings are discussed. 相似文献
944.
Loreen Wolfer Ph.D. Thomas E. Baker M.S. M.E.D. 《Journal of Police and Criminal Psychology》1998,13(2):55-66
Police leadership is increasingly dependent on community oriented policing (COPS) federal grants because of diminishing financial
resources. This paper demonstrates the importance of excellent police grantsmanship skills while simultaneously providing
theoretical and concrete steps for achieving a successful grant package. Furthermore, a case study example is presented where
COPS grants and federal funding assisted in the acquisition of community-oriented and problem-solving strategic objectives. 相似文献
945.
Fluidity of cadaveric blood after sudden death: Part III. Acid-base balance and fibrinolysis 总被引:1,自引:0,他引:1
S Takeichi I Tokunaga K Hayakumo M Maeiwa 《The American journal of forensic medicine and pathology》1986,7(1):35-38
In rats, fibrinolytic activity and acidosis increased rapidly after death. Postmortem fibrinolysis and the pH, base excess (BE), and [HCO3-] levels were affected by the method of sacrifice: the lower the pH, BE, and [HCO3-] levels, the higher the fibrinolytic activity. Conversely, in experiments using the vascular perfusion technique, low pH, BE, and [HCO3-] levels of the perfusate induced abundant release of plasminogen activator from the vascular wall. 相似文献
946.
The purpose of this paper is to see how economic factors determine prices in the previously communist countries undergoing privatization. This does not concern the auctions of big state enterprises where the prices are found to be rigged. In this paper we estimate hedonic price functions based on a unique data set on auction prices of apartments in Moscow. We collected the data ourselves by attending the auctions and gathered data on the characteristics. We estimated the hedonic equations using a disequilibrium approach because no equilibrium prices were observed for large number of apartments that were withdrawn from the auction. We found that, as the privatization of residential housing was carried out, the hedonic price equations fit the data remarkably well. 相似文献
947.
Mild hypothermia, induced by experimental immersion of ten subjects in cold water, distorted the decay curve of breath ethanol of intoxicated subjects by as much as 22% while not altering overall ethanol clearance rate. The results provide in vivo verification of the in vitro temperature correction factor of 6.8% X degrees C-1, and support previous recommendations that temperature monitoring be included in procedures for breath-ethanol testing. We recommend that mouth temperature be obtained before breath sampling to screen for abnormal body temperature and to allow for potential use of a temperature correction factor. This modification to existing analytical procedures would help to optimize the reliability of breath-ethanol analysis in predicting blood-ethanol concentration. 相似文献
948.
The increasing number of discussions on the influence of toxic environmental factors, including SIDS, prompted systematic postmortem chemical-toxicological investigations to be carried out on 54 SIDS cases and 2 control cases of the same age group. Tissue levels of arsenic, lead, cadmium, mercury, and pentachlorphenol, as well as other organic noxious agents, were measured in several organs. In addition, the COHb concentrations were determined. In spite of the widely scattered values, the extreme levels measured and the arithmetic means and median averages of As, Pb, Cd, Hg, PCP, and COHb had no more range in concentrations than can be expected for toxic effects - according to present knowledge anyway. It was observed that infants from an urban environment showed no greater concentration of noxious agents than did infants from rural regions. There were also no differences between SIDS cases and the controls, nor was there a correlation between infections of the respiratory system that are often morphologically detected - including laryngitis - and higher concentrations of these agents in the organs of SIDS cases. 相似文献
949.
John S. Carroll 《Law and human behavior》1987,11(4):319-335
The effectiveness of law as an instrument of social control depends on the assumptions lawmakers and implementers have about human behavior. The tax laws offer a good example of the difficulties in trying to anticipate what people will do in response to various legal requirements. This paper proposes a new approach to understanding tax compliance drawn from behavioral decision theory. The paper discusses the issue of rationality, explores the strategies people use to make taxpaying decisions, focuses on the distinction between norm-processing and outcome-processing strategies, and presents some implications of this approach for research and for legal policy making. 相似文献
950.