全文获取类型
收费全文 | 4812篇 |
免费 | 190篇 |
专业分类
各国政治 | 189篇 |
工人农民 | 179篇 |
世界政治 | 317篇 |
外交国际关系 | 187篇 |
法律 | 3161篇 |
中国政治 | 42篇 |
政治理论 | 909篇 |
综合类 | 18篇 |
出版年
2021年 | 38篇 |
2020年 | 64篇 |
2019年 | 78篇 |
2018年 | 119篇 |
2017年 | 137篇 |
2016年 | 126篇 |
2015年 | 101篇 |
2014年 | 114篇 |
2013年 | 446篇 |
2012年 | 123篇 |
2011年 | 150篇 |
2010年 | 113篇 |
2009年 | 126篇 |
2008年 | 151篇 |
2007年 | 128篇 |
2006年 | 151篇 |
2005年 | 121篇 |
2004年 | 123篇 |
2003年 | 132篇 |
2002年 | 116篇 |
2001年 | 201篇 |
2000年 | 154篇 |
1999年 | 119篇 |
1998年 | 50篇 |
1997年 | 60篇 |
1996年 | 46篇 |
1995年 | 53篇 |
1994年 | 53篇 |
1993年 | 60篇 |
1992年 | 92篇 |
1991年 | 99篇 |
1990年 | 92篇 |
1989年 | 74篇 |
1988年 | 91篇 |
1987年 | 85篇 |
1986年 | 108篇 |
1985年 | 124篇 |
1984年 | 93篇 |
1983年 | 89篇 |
1982年 | 49篇 |
1981年 | 42篇 |
1980年 | 27篇 |
1979年 | 38篇 |
1978年 | 34篇 |
1975年 | 32篇 |
1974年 | 48篇 |
1972年 | 28篇 |
1971年 | 32篇 |
1970年 | 31篇 |
1968年 | 33篇 |
排序方式: 共有5002条查询结果,搜索用时 0 毫秒
31.
N C Martin A A Pirie L V Ford C L Callaghan K McTurk D Lucy D G Scrimger 《Science & justice》2006,46(3):179-184
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling. 相似文献
32.
Toxicologic findings in the USS Iowa disaster. 总被引:5,自引:0,他引:5
The toxicologic results from the 47 victims of the explosion on the USS Iowa are presented. Good correlation between carboxyhemoglobin saturations and cause of death was found. There were no correlations between blood cyanide concentrations and causes of death. Volatile analysis suggested postmortem ethanol production rather than antemortem ethanol ingestion. No drugs except nicotine were detected in any of the victims. 相似文献
33.
K. Michael Reynolds Pamala L. Griset Ernest Scott 《American Journal of Criminal Justice》2006,31(1):1-17
Many attempts have been made over the last several decades to improve communication among law enforcement agencies. This article
is a case study of a “low-level” data sharing project in Florida that could serve as a national model. The Florida Law Enforcement
Data Sharing Consortium is a partnership between the University of Central Florida and more than one hundred law enforcement
agencies. It offers an inexpensive, yet technically advanced alternative to the proprietary data sharing model. Its distributed
architecture was endorsed by the Markle Foundation, the 9/11 Commission, and the 2004 National Security Act. Civil liberties
concerns raised by this and other types of data sharing projects are discussed. 相似文献
34.
35.
Routine crime in exceptional times: The impact of the 2002 Winter Olympics on citizen demand for police services 总被引:2,自引:0,他引:2
Despite their rich theoretical and practical importance, criminologists have paid scant attention to the patterns of crime and the responses to crime during exceptional events. Throughout the world large-scale political, social, economic, cultural, and sporting events have become commonplace. Natural disasters such as blackouts, hurricanes, tornadoes, and tsunamis present similar opportunities. Such events often tax the capacities of jurisdictions to provide safety and security in response to the exceptional event, as well as to meet the “routine” public safety needs. This article examines “routine” crime as measured by calls for police service, official crime reports, and police arrests in Salt Lake City before, during, and after the 2002 Olympic Games. The analyses suggest that while a rather benign demographic among attendees and the presence of large numbers of social control agents might have been expected to decrease calls for police service for minor crime, it actually increased in Salt Lake during this period. The implications of these findings are considered for theories of routine activities, as well as systems capacity. 相似文献
36.
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
37.
Colin Scott 《The Modern law review》1990,53(6):785-801
38.
39.
N D Sperber 《Journal of forensic sciences》1990,35(4):838-844
A review of the available literature does not reveal a plausible explanation as to why the incisal edges of maxillary anterior teeth do not always mark clearly. Generally, the mandibular incisal edges do mark with some consistency. This paper demonstrates through test bites on skin that the answer lies in the position of the mandible. 相似文献
40.
Postmortem examination of a former professional basketball player revealed an abnormal heart, most notably a single coronary artery. The literature on single coronary arteries is briefly reviewed, and the possible mechanism which caused the patient's condition is considered. This case is particularly unusual because of the patient's profession, which is so physically demanding. 相似文献