全文获取类型
收费全文 | 478篇 |
免费 | 17篇 |
专业分类
各国政治 | 19篇 |
工人农民 | 16篇 |
世界政治 | 29篇 |
外交国际关系 | 40篇 |
法律 | 281篇 |
中国政治 | 6篇 |
政治理论 | 104篇 |
出版年
2023年 | 2篇 |
2022年 | 8篇 |
2021年 | 13篇 |
2020年 | 13篇 |
2019年 | 12篇 |
2018年 | 18篇 |
2017年 | 24篇 |
2016年 | 12篇 |
2015年 | 9篇 |
2014年 | 18篇 |
2013年 | 53篇 |
2012年 | 24篇 |
2011年 | 20篇 |
2010年 | 12篇 |
2009年 | 12篇 |
2008年 | 18篇 |
2007年 | 27篇 |
2006年 | 19篇 |
2005年 | 9篇 |
2004年 | 18篇 |
2003年 | 13篇 |
2002年 | 15篇 |
2001年 | 21篇 |
2000年 | 20篇 |
1999年 | 11篇 |
1998年 | 4篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 6篇 |
1990年 | 5篇 |
1989年 | 7篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 6篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 6篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1970年 | 2篇 |
1969年 | 1篇 |
排序方式: 共有495条查询结果,搜索用时 15 毫秒
171.
In this paper the authors report on a case of lethal suicidal toxification with protriptyline and haloperidol after oral ingestion. Gas chromatographic and radioimmunologic investigations were used for quantitative determination of protriptyline and haloperidol in blood, urine, and tissues. The highest concentrations were found in lung and liver. These concentrations are discussed with reference to the cause of death. 相似文献
172.
Two studies investigated the effects of a child witness's age (5, 10, or 15 years old), communication style (powerful vs. powerless), and prosecuting attorney questioning methods (leading vs. nonleading) on perceptions of her testimony in a videotaped mock trial. In Experiment 1, as predicted, ratings of a child witness's credibility were most extreme when the child's communication style contrasted with adults' age-related expectations. Results of Experiment 2 showed that the child's communication style strongly affected perceptions of the defendant as well. 相似文献
173.
The authors examined the enzyme activities of LDH, CK, GOT, GPT and gamma-GT in blood-free pericardial fluid. The cases were divided into seven groups: a shot in the head with instant death, sudden cardiac death, poisoning, brain death with a long survival time, sudden infant death syndrome, and asphyxia. Taking all five enzymes into consideration, the cases of cardiac death differed significantly on the 1% level from the head shooting. However, concerning CK sudden cardiac death differed on the 5% level from the deaths as a result of poisoning. The wide range of the results, however, does not permit any reliable association of one single value with any of the respective groups. 相似文献
174.
175.
176.
177.
In this article we undertake a detailed exploration of the research and development activities in one particular middle-income country. We explore what the data from R&D surveys can tell us about the levels, the determinants and the effectiveness of R&D in the manufacturing sector. We point to some of the broader factors that may have influenced South Africa’s drive to improve the technological capacity of its manufacturing sector, but we mostly focus on those issues associated directly with R&D. We show that the degree of interaction between the different domains of R&D activity, business, government and the tertiary sector has been weak, and that the possibility of positive spill-overs between these domains has not been fully exploited. In addition, little or no policy intervention designed to stimulate R&D activity by industry has been deployed in South Africa. We find that South African R&D activity has mainly been reactive in character and suggest that this lies at the heart of South Africa’s mixed R&D performance in relation to other developing countries. 相似文献
178.
A thirteen-year old girl attending a special school who had been suffering from genuine epilepsy for about one year was found dead completely clothed in the full bathtub in the bathroom of her parent's flat. The characteristic features of death by drowning but also signs of strangulation as well as a condition after shackling of the hands were found in the forensic post-mortem examination and autopsy. The putative strangulation instrument was a pair of tights which was floating in the bathwater. The hands were probably tied with the lace of a sneaker. In the further course of events, the inquiries and investigations initially commenced on the assumption of a capital crime gave reason to consider suicide. A reconstruction experiment under comparable external conditions indicates that this is possible. From a forensic-psychiatric point of view, an exacerbative mental crisis situation can be inferred as a final motive from the known personality configuration and the immediate circumstances. The tragic outcome in the final phase appears to have been determined by the additional complication of a provoked grand mal epilepsy attack. All in all, this hypothesis is the most plausible. However, subjective and objective observations do not rule out the possibility of homicide. 相似文献
179.
Amanda O. Fisher‐Hubbard M.D. Kilak Kesha M.D. Francisco Diaz M.D. Chantel Njiwaji M.D. PaoLin Chi M.D. Carl J. Schmidt M.D. 《Journal of forensic sciences》2016,61(6):1541-1545
The Valsalva maneuver is used in clinical medicine for the diagnosis and/or treatment of various cardiovascular conditions. It can also be used in activities of daily living, such as defecation. Due to the cardiovascular effects produced during the Valsalva maneuver, it may be contraindicated in certain medical conditions and could be a trigger of sudden cardiac death. The incidence and prevalence of death following Valsalva maneuver in the presence of underlying cardiovascular disease, or “commode cardia,” has not been examined. In 2012, the Wayne County Medical Examiner's Office (Detroit, MI) investigated 21 deaths that occurred on the toilet, fourteen of which were due to cardiovascular disease. In another 31 deaths in the bathroom due to cardiovascular disease, the possibility that the decedent defecated immediately prior to death could not be excluded. Hence, the incidence of commode cardia in this population ranges from 2.3 to 7.4% of all cardiovascular‐related deaths. 相似文献
180.
Patrick Bayer Johannes Urpelainen Alice Xu 《International Environmental Agreements: Politics, Law and Economics》2016,16(2):261-283
The Kyoto Protocol’s Clean Development Mechanism (CDM) has the capacity to incentivize the international transfer of environmentally sound technologies. Given that both countries are expected to have similar incentives when managing the distribution of technology transfer within the country, why do sub-national patterns in the allocation of projects with technology transfer differ? Using comparable political–economic data compiled for China and India, we offer an explanation for these differences. In China, where the government regards the CDM as a tool for achieving sustainable development, technology transfer is concentrated in provinces that need it the most and that are most conducive to receiving transfers (i.e., economically less developed, yet heavily industrialized provinces). In India, where the government takes on a “laissez-faire” approach to the CDM, neither level of economic development nor that of industrialization affects clean technology transfer. In this regard, although the incentives are similar, the capacity to pursue them is not comparable. We test these hypotheses using data on CDM technology transfer across Chinese provinces and Indian states during the 6-year period from 2004 to 2010. 相似文献