全文获取类型
收费全文 | 7138篇 |
免费 | 461篇 |
专业分类
各国政治 | 333篇 |
工人农民 | 224篇 |
世界政治 | 463篇 |
外交国际关系 | 235篇 |
法律 | 5018篇 |
中国政治 | 34篇 |
政治理论 | 1257篇 |
综合类 | 35篇 |
出版年
2020年 | 156篇 |
2019年 | 169篇 |
2018年 | 176篇 |
2017年 | 207篇 |
2016年 | 212篇 |
2015年 | 196篇 |
2014年 | 179篇 |
2013年 | 740篇 |
2012年 | 154篇 |
2011年 | 167篇 |
2010年 | 206篇 |
2009年 | 222篇 |
2008年 | 163篇 |
2007年 | 158篇 |
2006年 | 166篇 |
2005年 | 161篇 |
2004年 | 180篇 |
2003年 | 156篇 |
2002年 | 139篇 |
2001年 | 309篇 |
2000年 | 252篇 |
1999年 | 225篇 |
1998年 | 98篇 |
1997年 | 64篇 |
1996年 | 70篇 |
1995年 | 80篇 |
1994年 | 86篇 |
1993年 | 87篇 |
1992年 | 151篇 |
1991年 | 158篇 |
1990年 | 145篇 |
1989年 | 156篇 |
1988年 | 122篇 |
1987年 | 137篇 |
1986年 | 124篇 |
1985年 | 132篇 |
1984年 | 101篇 |
1983年 | 117篇 |
1982年 | 82篇 |
1981年 | 78篇 |
1980年 | 55篇 |
1979年 | 108篇 |
1978年 | 70篇 |
1977年 | 58篇 |
1976年 | 50篇 |
1975年 | 47篇 |
1974年 | 55篇 |
1973年 | 55篇 |
1972年 | 44篇 |
1968年 | 40篇 |
排序方式: 共有7599条查询结果,搜索用时 15 毫秒
881.
882.
Hanging: suicide or homicide? 总被引:1,自引:0,他引:1
Death by Hanging: Suicide or Homicide. Six cases of homicidal hanging and murder presented as suicidal hanging are recorded. Suspension followed strangulation by ligature or throttling and head injuries in 4 cases. Distinction between homicide and suicide was easy in 5 cases: two of the perpetrators gave themselves up to the police, one committed suicide immediately after he had hanged his 15 year old daughter; in two cases tracks of blood, heavy injuries of the victims, and traces of robbery were obvious. Unless the victim is an infant or an adult person incapacitated by drink, disease, or drugs, or unless there are several assailants murder is difficult to accomplish. Distinction between murder and suicide may be impossible by an examination of the body alone. Detailed investigation of the scene, reconstruction of the position of the suspended body, examination of the rope, the knots, the direction of the fibres on the rope may serve to discover homicidal hanging. - Compared to suicidal hanging homicide has a frequency of about 1% in our autopsy material. However, we cannot estimate the number of obscure cases. 相似文献
883.
W. L. Marshall Peter Bryce S. M. Hudson T. Ward B. Moth 《Journal of family violence》1996,11(3):219-235
The present report describes the component of our treatment program that is aimed at enhancing intimacy skills and reducing loneliness in sexual offenders. The evaluation of this component, although limited in sophistication, offers data that encourages confidence in the value of the treatment component. 相似文献
884.
885.
The method of choice to determine erythrocyte glutamate-pyruvic transaminase (GPT) including rare variants was starch gel electrophoresis. Methods using agarose as gel medium were not reported to our knowledge. We present an adapted method using the Tris/maleate buffer system and an agarose of low endosmosis. The common as well as rare variant types of GPT were quickly and reliably separated. In addition, a method for the consecutive determination of esterase D (ESD) and GPT on the same gel using the malic acid buffer system is described. 相似文献
886.
887.
888.
889.
B G Rabe 《Journal of health politics, policy and law》1990,15(3):571-589
Congress plays a central role in national environmental policy formation but appears ill equipped to set policy priorities and devise integrative legislation. Fragmentation of authority among a multiplicity of committees and subcommittees, especially in the House, contributes to these problems. This pattern is evident in the evolution of Superfund, the national program to clean up abandoned hazardous waste sites. The prolonged process of reauthorization in the 1980s contributed to serious program delay and failed to resolve a number of fundamental questions concerning the national cleanup effort. Institutional reforms could contribute to a more effective congressional role in future environmental policy deliberations. 相似文献
890.
Supravital electrical excitability of muscles 总被引:1,自引:0,他引:1
A new method of postmortem electrical stimulation of muscles, measuring the force of the reaction against time, is presented. Preliminary investigations have yielded the following results: The maximum force of reaction in response to a definitive stimulation, measured by a sensitive force transducer, decreases in proportion to the post mortem interval. Using this method, the mechanical reactions of muscles by electrical stimulation can be demonstrated over a much longer postmortem period as these movements are visible. The duration of postmortem reaction of different muscles seems to be much more uniform than was previously assumed. Occasionally, reactions of the M. orbicularis oculi can be seen for the longest time. The basal muscular tonus changes relative to time. The time course of a single force reaction also changes relative to the postmortal interval: the reaction becomes slower. It has been theoretically established that measurement of influencing factors such as temperature and pH in the tested muscle will enable the time of death to be more precisely estimated. 相似文献