全文获取类型
收费全文 | 2735篇 |
免费 | 81篇 |
专业分类
各国政治 | 132篇 |
工人农民 | 219篇 |
世界政治 | 186篇 |
外交国际关系 | 116篇 |
法律 | 1812篇 |
中国政治 | 12篇 |
政治理论 | 333篇 |
综合类 | 6篇 |
出版年
2023年 | 18篇 |
2022年 | 16篇 |
2021年 | 32篇 |
2020年 | 47篇 |
2019年 | 55篇 |
2018年 | 164篇 |
2017年 | 85篇 |
2016年 | 158篇 |
2015年 | 62篇 |
2014年 | 69篇 |
2013年 | 217篇 |
2012年 | 178篇 |
2011年 | 131篇 |
2010年 | 40篇 |
2009年 | 49篇 |
2008年 | 48篇 |
2007年 | 50篇 |
2006年 | 53篇 |
2005年 | 418篇 |
2004年 | 143篇 |
2003年 | 61篇 |
2002年 | 35篇 |
2001年 | 45篇 |
2000年 | 36篇 |
1999年 | 23篇 |
1996年 | 9篇 |
1994年 | 10篇 |
1992年 | 30篇 |
1991年 | 32篇 |
1990年 | 35篇 |
1989年 | 43篇 |
1988年 | 34篇 |
1987年 | 36篇 |
1986年 | 32篇 |
1985年 | 25篇 |
1984年 | 16篇 |
1983年 | 19篇 |
1980年 | 10篇 |
1979年 | 17篇 |
1978年 | 16篇 |
1975年 | 15篇 |
1974年 | 24篇 |
1973年 | 22篇 |
1972年 | 19篇 |
1971年 | 27篇 |
1970年 | 14篇 |
1969年 | 8篇 |
1968年 | 12篇 |
1967年 | 11篇 |
1965年 | 9篇 |
排序方式: 共有2816条查询结果,搜索用时 15 毫秒
11.
A report of an international collaborative experiment to demonstrate the uniformity obtainable using DNA profiling techniques. 总被引:2,自引:0,他引:2
P Gill S Woodroffe W B?r B Brinkmann A Carracedo B Eriksen S Jones A D Kloosterman B Ludes B Mevag 《Forensic science international》1992,53(1):29-43
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP). 相似文献
12.
13.
This paper studies the impact of daily official foreign exchange interventions on the exchange rates in Croatia for the period from 1996 to 2004. Using the event study methodology and a variety of GARCH models reveals that the Croatian central bank was in a position to influence, to some extent, the level of the exchange rate during the period studied. This lends support to the view that foreign exchange intervention may be effective in emerging market economies. 相似文献
14.
Rechtsanw?ltin Christina Schultz Rechtsanwalt Dr. Jan-Christof Krüger 《Natur und Recht》2005,27(1):1-8
Mit der Einführung einer Entgeltpflicht für die Entnahme von Wasser in Nordrhein-Westfalen ist der erlaubnisfreie wasserrechtliche Eigentümergebrauch in den Mittelpunkt des Interesses gerückt. Denn wer Wasser im Rahmen des Eigentümergebrauchs aus einem oberirdischen Gewässer entnimmt, ist von dieser Entgeltpflicht befreit. Der folgende Beitrag erläutert die im Zusammenhang mit der Gewinnung nichtenergetischer Rohstoffe insoweit relevanten Fragen.
* Die Verfasser sind, Mitarbeiter der Anders u.Thomé Rechtsanwaltsgesellschaft mbH in Krefeld 相似文献
15.
Ernst-Rainer H?nes 《Natur und Recht》2010,19(1):629-635
Der Wald hat für uns ?konomische, ?kologische, soziale und kulturelle Bedeutung. Leider
ist in letzter Zeit die kulturelle Bedeutung im Vergleich zur ?kologischen Bedeutung ins politische
Abseits geraten. Nun will man das seit 1975 geltende Bundeswaldgesetz novellieren. Dabei sollte zur besseren
Berücksichtigung des Denkmalschutzes bei der Definition des Waldes klargestellt werden, dass Park-,
Garten- und Friedhofsanlagen kein Wald im Sinne des Bundeswaldgesetzes sind. Die Bedeutung des Waldbodens
als Archiv der Natur- und Kulturgeschichte muss betont werden. Nicht zuletzt wegen der angestrebten Eintragung
der Deutschen Buchenw?lder in die Liste des Erbes der Welt muss zum Ausdruck kommen, dass Deutschland
die europ?ischen und internationalen Bemühungen zum Erhalt des Kultur- und Naturerbes wie das
übereinkommen zum Schutz des Kultur- und Naturerbes der Welt von 1972 unterstützt. 相似文献
16.
A mock jury study was conducted to test the hypothesis that perceptions of a witness can be biased by presumptuous cross-examination questions. A total of 105 subjects read a rape trial in which the cross-examiner asked a question that implied something negative about the reputation of either the victim or an expert. Within each condition, the question was met with either a denial, an admission, or an objection from the witness's attorney. Results indicated that although ratings of the victim's credibility were not affected by the presumptuous question, the expert's credibility was significantly diminished—even when the question had elicited a denial or a sustained objection. Conceptual and practical implications of these findings are discussed.This research was supported by funds provided to the first author by the Bronfman Science Center. 相似文献
17.
Quadratic pieces of fleece measuring 16 mm2 were soaked with 10 different blood-samples in the dilution steps of 1:1, 1:10, 1:100, 1:1000, respectively, and were tested in blood group typing and identification tests of forensic serology. The above spezified dilutions correspond with 5 microliters, 0.5 microliter, 0.05 microliter and 0.005 microliter of blood, respectively. The detection limit of the microspectrometric test for blood was the dilution 1:10, of the porphyrine test a dilution above 1:100, whereas the preliminary test for blood (peroxidase) succeeded always up to a dilution of 1:1000 and the species determination by the radial immunodiffusion test in agar gels succeeded in most cases op to a dilution of 1:1000. The detection limit of the anti-human globulin inhibition test was between the dilution steps 1:10 and 1:100 when non-titrated and undiluted anti-human globulin serum was used. Gc- and ABO-grouping were possible up to a dilution of 1:100 and were thus the most sensitive grouping systems. Phenotyping of the enzyme-systems and the Gm/Km-system usually required stains with considerably higher blood concentrations i.e. stains of undiluted blood. 相似文献
18.
M Y I?can 《Journal of forensic sciences》1988,33(6):1473-1476
Dr. Wilton Marion Krogman was one of the major founders of physical and forensic anthropology in the United States. His extraordinary career spanned nearly six decades, and he was universally admired and respected for his scholarship, teaching, research, wit, and humanity. While studies based on human skeletal remains have long been used to assist the medicolegal system, the late Dr. Krogman can be credited with uniting these areas into the discipline of forensic anthropology. His "Guide to the Identification of Human Skeletal Material" (1939) in the F.B.I. Law Enforcement Bulletin became the foundation of this discipline; his monumental book The Human Skeleton in Forensic Medicine (updated with the author in 1986) solidified its establishment. The purpose of this paper is to pay tribute to this great man and outline his influence on the development and advancement of forensic anthropology. 相似文献
19.
G M Sule?menova 《Sudebno-meditsinskaia ekspertiza》1992,35(1):14-16
A new structure of conclusions including special chapter "Conclusion validity", which ensures their high availability for officials of legal investigation agencies is suggested. The examples of conclusion making on the basis of new form in case of blood, secretion and hair tests performed in two variants (known and unknown criminal) are presented. 相似文献
20.
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