全文获取类型
收费全文 | 11371篇 |
免费 | 322篇 |
专业分类
各国政治 | 565篇 |
工人农民 | 565篇 |
世界政治 | 638篇 |
外交国际关系 | 347篇 |
法律 | 7141篇 |
中国共产党 | 4篇 |
中国政治 | 73篇 |
政治理论 | 2268篇 |
综合类 | 92篇 |
出版年
2020年 | 125篇 |
2019年 | 160篇 |
2018年 | 311篇 |
2017年 | 269篇 |
2016年 | 330篇 |
2015年 | 192篇 |
2014年 | 178篇 |
2013年 | 1164篇 |
2012年 | 375篇 |
2011年 | 333篇 |
2010年 | 223篇 |
2009年 | 259篇 |
2008年 | 302篇 |
2007年 | 273篇 |
2006年 | 321篇 |
2005年 | 613篇 |
2004年 | 361篇 |
2003年 | 260篇 |
2002年 | 270篇 |
2001年 | 312篇 |
2000年 | 296篇 |
1999年 | 225篇 |
1998年 | 135篇 |
1997年 | 145篇 |
1996年 | 126篇 |
1995年 | 119篇 |
1994年 | 109篇 |
1993年 | 131篇 |
1992年 | 219篇 |
1991年 | 238篇 |
1990年 | 224篇 |
1989年 | 240篇 |
1988年 | 206篇 |
1987年 | 224篇 |
1986年 | 218篇 |
1985年 | 205篇 |
1984年 | 185篇 |
1983年 | 194篇 |
1982年 | 115篇 |
1981年 | 117篇 |
1980年 | 93篇 |
1979年 | 123篇 |
1978年 | 92篇 |
1977年 | 93篇 |
1976年 | 68篇 |
1975年 | 79篇 |
1974年 | 86篇 |
1973年 | 91篇 |
1972年 | 77篇 |
1968年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
111.
112.
113.
The "mini-packer" syndrome. Fatal ingestion of drug containers in Baltimore, Maryland 总被引:1,自引:0,他引:1
We report seven fatalities resulting from the ingestion of illicit drugs packaged in condoms, rubber balloons, or plastic bags which were observed in the last 4 years at the Office of the Chief Medical Examiner, State of Maryland. All the victims, with the exception of one, were men ranging in age from 19 to 37 years. There was no racial predominance. No drug paraphernalia was found at any scene. In two cases, seizure-like activity was documented. One victim had recently returned from Nigeria; therefore, Lassa fever was initially suspected. Two of the victims were "body packer" contrabanders who had just arrived from Africa. They used body cavities to hide large amounts of heroin to avoid U.S. Customs. The other five cases were "mini-packers," small-time illicit drug dealers who had swallowed a single bag of cocaine to avoid police detection. The possible mechanism of leaking or rupture of the latex container is discussed. 相似文献
114.
E L Berrizbeitia 《Journal of forensic sciences》1989,34(5):1206-1213
Analysis of a sample of 1108 radii corresponding to 567 black and white North Americans in the Terry Collection at the Smithsonian Institution demonstrates that the diameter of the radial head is an accurate sex discriminator for human remains. A simple "radial-head method" of sex determination consists of measuring the maximum and minimum diameters of the head and comparing such measurements with the test cutoff points. The subject is female when the maximum radial head diameter (either left or right) is less than or equal to 21 mm, and male when the maximum diameter (either left or right) is greater than or equal to 24 mm. The same decisions apply to the minimum diameters of 20 mm or less and 23 mm or more, respectively. When the maximum diameter is 23 mm or the minimum is 22 mm, the subject is more likely male; when the maximum diameter is 22 mm or the minimum is 21 mm, the subject is more likely female. The sample frequency of any one of these latter diameters is never more than 16%. Cross-validation of the method with a sample of 50 pairs of radii of the Terry Collection, different from the original specimens, resulted in 92% sexing accuracy when using the left radius singly, 94% accuracy when using the right radius singly, and 96% accuracy when using both radii jointly. 相似文献
115.
D A Hawley N H Haskell D G McShaffrey R E Williams J E Pless 《Journal of forensic sciences》1989,34(3):617-621
During preliminary examination of the body of a homicide victim, a peculiar red "fiber" was noticed and recovered. Initially believing this to be a carpet fiber, the item was subjected to fiber analysis. It was found to be a short coiled particle not like any known natural or synthetic fabric fiber. Subsequent examinations determined this "fiber" to be the larva of a common freshwater midge (Diptera; Chironomidae). Chironomid larvae have been observed on other bodies recovered from freshwater environments. Entomological studies of this organism have led to the conclusion that the presence of chironomid larvae indicates submersion of the body. 相似文献
116.
Programme based on mathematical model of the process of dead body temperature changing was developed for estimation of postmortem interval. Automatic retrieval of problem solution was performed on programmable microcalculators of "Electronica MK-61" type using adaptive approach. Diagnostical accuracy in case of dead body being preserved in permanent cooling conditions is +/- 3%. 相似文献
117.
J Bohl H H Goebel L P?tsch W Esinger G Walther R Mattern K H Merkel 《Zeitschrift für Rechtsmedizin》1989,103(1):1-20
So far, the law in the Federal Republic of Germany still allows the injection of fresh-cell preparations from animals as a roborant to increase the vitality of the organism and to strengthen the body's immune defense system. The use of "sicca-cell" preparations was provisionally forbidden in 1987 by the Federal Health Organization (Bundesgesundheitsamt; BGA). Prohibition of fresh-cell injections would have exceeded the authority of this office, although the same serious reservations also applied in the case of this treatment method. Several publications that have appeared since 1955 have reported serious complications of this therapy, some life-threatening and some even lethal. Two further cases are now added: (1) A woman aged 69 had been receiving treatment with cell injections for 9 years. Immediately after an injection of sicca cells she collapsed and was hospitalized; 7 days thereafter she developed an ascending paralysis with increasing inability to swallow or breathe. She died 25 days after the injection as a consequence of central and peripheral respiratory failure. Autopsy revealed the alterations typical for acute Landry-Guillain-Barré-Strohl syndrome. (2) A 76-year-old healthy woman had been receiving treatment with fresh-cell preparations for several years. After an injection of cell suspensions a painful local swelling was observed. The symptoms were interpreted as the consequence of an iatrogenic local hematoma, and repeated punctures were performed to obtain blood. The patient was transferred to a surgical department for further therapy. Two days after the injection she suddenly died with signs of acute cardiovascular failure. Autopsy revealed the signs of a fulminating clostridial infection and also the characteristic signs of Landry-Guillain-Barré syndrome with involvement of the autonomic nervous system. In both cases the development of an inflammatory process in the peripheral nervous system could be interpreted as an immune-mediated allergic disease, related to the repeated injection of heterologous antigenic material containing nervous tissues. This hypothesis would also explain the two other cases already published and would be consistent with the observed perivenous leukoencephalopathy of the central nervous system. The human disease pictures correspond to the well-established animal models of EAEM (experimental allergic encephalomyelitis) and EAN (experimental allergic neuritis). The pathogenesis is discussed; the major role of the central and peripheral nervous system is stressed, with special reference to the risk of acute autonomic failure. The need for specific autopsy techniques for the investigation of the entire nervous system, including spinal cord, roots, spinal ganglia and peripheral nerves with sympathetic chains, is raised. 相似文献
118.
119.
120.
Brian E. Burtch 《Crime, Law and Social Change》1987,10(4):399-420
The New Midwifery, a form of community midwifery rooted in home birth and intensive prenatal and postnatal care, has attracted great controversy since its appearance in British Columbia in the early 1970s. On the one hand, this form of community midwifery has endured despite legal prohibition. Midwives derive an income from their practices, obtain necessary supplies and equipment, and are active in lobbying for recognition through the State. On the other hand, community midwifery is marginalized and illegal. Out-of-hospital births comprise less than one percent of births in British Columbia (and nationwide). Community midwives are excluded from the provincal Medical Services Plan and they lack hospital privileges if their clients are transferred to hospital. Community midwives are more likely than medical personnel to be tried for criminal negligence causing death and subject to prosecution under theMedical Practitioners Act of practicing medicine without a license.Community midwifery illustrates the structural limits placed on female birth attendants working outside the norm of professionally accredited, hospital situated childbirth. It is concluded that State measures in Canada structure power relations in a dialectical fashion. This includes measures to consolidate the monopoly status of the medical profession and the nursing profession, while temporizing about demands for independent midwifery practice. State powers are however relatively autonomous of dominant economic groups such as the Medical profession. Not all prosecutions of community midwives are successful, and contradictions in State policies surrounding monopolistic powers and civil liberties, and gender relations are evident.An earlier version of this paper was presented at the Canadian Sociology and Anthropology Association Meetings, University of Manitoba, June 1986. The author is grateful for resources provided through the Social Sciences and Humanities Research Council of Canada, the Department of Anthropology and Sociology (University of British Columbia), and the School of Criminology, Simon Fraser University. Comments from Carol Bullock, Nanette Davis, Bob Ratner, Livy Visano and the Journal referees have been helpful in revising this paper. 相似文献