全文获取类型
收费全文 | 17000篇 |
免费 | 581篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 715篇 |
工人农民 | 748篇 |
世界政治 | 1116篇 |
外交国际关系 | 599篇 |
法律 | 10899篇 |
中国共产党 | 8篇 |
中国政治 | 163篇 |
政治理论 | 3155篇 |
综合类 | 183篇 |
出版年
2021年 | 100篇 |
2020年 | 236篇 |
2019年 | 293篇 |
2018年 | 365篇 |
2017年 | 427篇 |
2016年 | 423篇 |
2015年 | 311篇 |
2014年 | 320篇 |
2013年 | 1620篇 |
2012年 | 467篇 |
2011年 | 499篇 |
2010年 | 428篇 |
2009年 | 440篇 |
2008年 | 531篇 |
2007年 | 566篇 |
2006年 | 542篇 |
2005年 | 489篇 |
2004年 | 474篇 |
2003年 | 494篇 |
2002年 | 441篇 |
2001年 | 674篇 |
2000年 | 547篇 |
1999年 | 485篇 |
1998年 | 250篇 |
1997年 | 172篇 |
1996年 | 208篇 |
1995年 | 173篇 |
1994年 | 203篇 |
1993年 | 202篇 |
1992年 | 321篇 |
1991年 | 363篇 |
1990年 | 345篇 |
1989年 | 287篇 |
1988年 | 322篇 |
1987年 | 276篇 |
1986年 | 318篇 |
1985年 | 283篇 |
1984年 | 233篇 |
1983年 | 221篇 |
1982年 | 178篇 |
1981年 | 193篇 |
1980年 | 130篇 |
1979年 | 171篇 |
1978年 | 122篇 |
1977年 | 106篇 |
1975年 | 124篇 |
1974年 | 133篇 |
1973年 | 103篇 |
1972年 | 99篇 |
1969年 | 98篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
This paper proceeds with the premise that individual lives, societies and cultures in our globalizing era in general and in Western countries in particular are becoming increasingly fragile and vulnerable to fragmentation and atomization. This fragmentation, the paper argues, is embedded in a complex interplay between a variety of factors, including the forces unleashed by late modernity and globalization and the increasing diversification of societies across the globe. This is followed by a critique of the existing models of societal integration, including nationalism, multiculturalism, civil society and communitarianism. In the concluding part of the paper, multicommunitarianism is proposed as an alternative to the existing models of societal and national integration, aimed at healing the rupture caused by the processes of modernization and globalization and at restoring the balance and harmony between the individual and society. 相似文献
992.
Mohino Justes S Ortega-Monasterio L Planchat Teruel LM Cuquerella Fuentes A Talón Navarro T Macho Vives LJ 《Journal of forensic sciences》2004,49(1):137-140
This study investigated deliberate self-harm (DSH) in young inmates. The objectives are twofold: first, to identify the social and clinical characteristics of inmates who commit DSH; and secondly, to ascertain the types of personality who are vulnerable in order to be able to predict future inmates who may harm themselves. A cross-sectional design was used to study psychosocial correctional personality characteristics and clinical pictures in inmates with DSH versus a control group without DSH. The measures used to evaluate different variables were a standard protocol and a self-report questionnaire (MCMI-II). Although the two groups compared are homogeneous and similar in terms of different psychosocial variables, inmates with DSH presented a significant background of maltreatment. Borderline, passive-aggressive, and antisocial personality disorders best discriminated both groups. The detection of borderline, negativistic, and antisocial disorders may help the medical services of penitentiary centers to predict youths with a possible risk of DSH. Despite the results obtained, longitudinal studies are needed to help clarify other risk factors, as well as other risk factors leading to self-harm behavior. 相似文献
993.
The purpose of this study was to evaluate the ability of two amphetamine class screening reagents to exclude ephedrine (EPH), pseudoephedrine (PSEPH), and phenylpropanolamine (PPA) from falsely producing positive immunoassay screening results. The study also sought to characterize the prevalence and concentration distributions of EPH, PSEPH, and PPA in samples that produced positive amphetamine screening results. Approximately 27,400 randomly collected human urine samples from Navy and Marine Corps members were simultaneously screened for amphetamines using the DRI and Abuscreen online immunoassays at a cutoff concentration of 500 ng/mL. All samples that screened positive were confirmed for amphetamine (AMP), methamphetamine (MTH), 3,4-Methylenedioxyamphetamine (MDA), 3,4-Methylenedioxymethamphetamine (MDMA), EPH, PSEPH, and PPA by gas chromatography/mass spectrometry (GC/MS). The DRI AMP immunoassay identified 1,104 presumptive amphetamine positive samples, of which only 1.99% confirmed positive for the presence of AMP, MTH, MDA, or MDMA. In contrast, the online AMP reagent identified 317 presumptive amphetamine positives with a confirmation rate for AMP, MTH, MDA, or MDMA of 7.94%. The presence of EPH, PSEPH, or PPA was confirmed in 833 of the 1,104 samples that failed to confirm positive for AMP, MTH, MDA, or MDMA; all of the 833 samples contained PSEPH. When compared to the entire screened sample set, PSEPH was present in approximately 3%, EPH in 0.9%, and PPA in 0.8% of the samples. The results indicate that cross reactivities for EPH, PSEPH, and PPA are greater than reported by the manufacturer of these reagents. The distribution of concentrations indicates that very large concentrations of EPH, PSEPH, and PPA are common. 相似文献
994.
POPULATION: descendants from Terenas an indigenous group. 相似文献
995.
Koehler SA Luckasevic TM Rozin L Shakir A Ladham S Omalu B Dominick J Wecht CH 《Journal of forensic sciences》2004,49(2):345-350
Each year over 3 million new chainsaws are sold in the United States. The operation of these newer saws combined with the millions of older chainsaws in circulation results in over 28,000 chainsaw-related injures annually. The majority of the injuries involve the hands and lower extremities with less than 10% involving injuries to the head and neck regions. Deaths while operating a chainsaw are extremely rare. The most common hazards associated with chainsaws are injuries caused by kickback, pushback, and pull-in. Kickback is the most common and poses the greatest hazard. Kickback occurs when the rotating chain is stopped suddenly by contact with a more solid area throwing the saw rapidly backward toward the operator. The cause of most injuries can be traced to improper use of the saw or poor judgment on part of the operator. We present two fatal chainsaw deaths; one with an older style saw, and the other with a modern type. In both cases the victims died from fatal injuries received to the neck region from a chainsaw kickback. The first case involved a 49-year-old white male operating an older style chainsaw with limited safety features. The second case involved a 38-year old white male who was operating a newer model chainsaw equipped with a low kickback chain in an unsafe manner. 相似文献
996.
A reliable determination of the post mortem interval (PMI) in human bones has neither been found by morphological nor by intensive analyses of other kinds. In most cases of legal medicine practice the question of PMI is restricted to a forensically relevant resting period. In a survey based upon literature, all osteological signs of decomposition, which have not been described for a soil embedded resting period of under 50 years, were collected. 21 research reports could be found, describing macroscopic findings on soil-embedded human bones with known PMI. All in all, 1295 individuals were examined in these investigations. A censorious review of the summarized results found in literature reveals that the following findings have never been seen in a PMI of 50 years or less. Outer appearance: macroscopically no adipocere, deep incisions of the outer compact layer, extensive defects of the bone surface, intense brownish-black lawn of microorganisms, fraying of the outer lamellar system, lifting of the cortical area, torsion of the tissue, attached brushit, bone manually breakable. On freshly sawn cross sections: lack of adipocere, brushit in the marrow area, reduced or lack of UV-fluorescence. 相似文献
997.
The article describes the case of a 29-year-old woman who was found dead in her apartment on a bar stool with the body being maximally retroflected in the lumbar region, the head hanging down and the feet and hands barely touching the floor. On external inspection of the body the cuff-like distribution of hypostasis on the forearms and lower legs was consistent with the position in which the body was found. There were no signs of foreign intervention. At autopsy massive congestion was found in the internal organs as well as pulmonary and cerebral edema. In the ventral region of the lumbar intervertebral discs superficial hemorrhages were detected. The alcohol content was 3.40 per thousand in the blood and 4.43 per thousand in the urine. As the essential pathogenetic mechanisms responsible for death reduced venous reflux to the heart in combination with postural asphyxia and the influence of alcohol are discussed. 相似文献
998.
999.
Padosch SA Schmidt PH Schyma C Hirsch RD Kröner LU Dettmeyer RB Madea B 《Archiv für Kriminologie》2004,214(5-6):149-162
The second part of the paper on suicides by gunshots to the head in the presence of witnesses focuses on relevant morphological autopsy findings such as entrance site, signs of close range or contact shots, bullet path etc. and also discusses selected aspects of ascertaining gunshot residues. For the identification of the shooter an integral medicolegal assessment of all the facts including the investigation results and the autopsy findings is essential. However, the morphological findings alone do not allow safe diagnosis, as for example in a homicide the temporal region, which was affected in all our cases, may have been deliberately chosen by the perpetrator as a localization typical of suicide. Thus methods to ascertain gunshot residues on the firing hand (by means of adhesive films and the polyvinyl-alcohol collection method--PVAL) are of great practical importance. In seven cases adhesive films and/or the polyvinyl-alcohol collection method were used. In one case the gunshot residues (GSR) were analysed by means of tape lifts and subsequent scanning electron microscopy (SEM). It was found that especially the combined application of topographical (adhesive tape/PVAL) and cumulative (SEM) methods allowed for the doubtless identification of the shooter, thus usually confirming the suicide. By the example of one case it is demonstrated that without the immediate collection of evidence at the scene objective reconstruction of the event becomes impossible. On the basis of the reported cases recommendations are finally given for a differentiated approach in the medicolegal evaluation of alleged witnessed suicide by gunshot (to the head). 相似文献
1000.