全文获取类型
收费全文 | 7297篇 |
免费 | 155篇 |
专业分类
各国政治 | 379篇 |
工人农民 | 202篇 |
世界政治 | 462篇 |
外交国际关系 | 279篇 |
法律 | 4607篇 |
中国共产党 | 1篇 |
中国政治 | 22篇 |
政治理论 | 1408篇 |
综合类 | 92篇 |
出版年
2020年 | 61篇 |
2019年 | 83篇 |
2018年 | 123篇 |
2017年 | 133篇 |
2016年 | 156篇 |
2015年 | 109篇 |
2014年 | 130篇 |
2013年 | 773篇 |
2012年 | 200篇 |
2011年 | 200篇 |
2010年 | 155篇 |
2009年 | 163篇 |
2008年 | 194篇 |
2007年 | 175篇 |
2006年 | 186篇 |
2005年 | 144篇 |
2004年 | 153篇 |
2003年 | 154篇 |
2002年 | 160篇 |
2001年 | 303篇 |
2000年 | 275篇 |
1999年 | 220篇 |
1998年 | 80篇 |
1997年 | 103篇 |
1996年 | 77篇 |
1995年 | 80篇 |
1994年 | 90篇 |
1993年 | 79篇 |
1992年 | 157篇 |
1991年 | 175篇 |
1990年 | 155篇 |
1989年 | 170篇 |
1988年 | 147篇 |
1987年 | 141篇 |
1986年 | 163篇 |
1985年 | 126篇 |
1984年 | 124篇 |
1983年 | 129篇 |
1982年 | 77篇 |
1981年 | 75篇 |
1980年 | 57篇 |
1979年 | 110篇 |
1978年 | 63篇 |
1977年 | 61篇 |
1976年 | 56篇 |
1975年 | 66篇 |
1974年 | 82篇 |
1973年 | 76篇 |
1972年 | 67篇 |
1971年 | 60篇 |
排序方式: 共有7452条查询结果,搜索用时 0 毫秒
991.
WILLIAM G. DOERNER 《犯罪学》1978,16(1):47-56
Abstract A study by Gastil concludes that the Southern area of the United States constitutes a regional subculture of violence. Loftin and Hill (1974) empirically challenge Gastil's findings at the ecological level of analysis. This study adds a further dimension to that line of research by examining violence-related items from a national survey at the individual level of analysis. Results fail to confirm the existence of a divergent value system among Southerners today. It is suggested that if a "regional culture of violence" once existed, it has vanished over the years. 相似文献
992.
A routine method is described for obtaining reproducible haptoglobin patterns from bloodstains by discontinuous polyacrylamide gel electrophoresis. By employing a stacking gel, proteins from bloodstain extracts are concentrated into narrow zones, before entering the resolving gel. This effect yields highly resolved haptoglobin patterns. Therefore, laboratories without the specialized equipment and expertise for polyacrylamide gradient gel preparation can still obtain highly resolved haptoglobin patterns from bloodstains. 相似文献
993.
994.
Wesley G. Skogan 《Journal of criminal justice》1975,3(1):17-31
This paper analyzes sources of error in the two major methods we use to measure crime in America—official police statistics and victimization surveys. The two produce quite different pictures of the volume and distribution of crime, but it is not clear that this is because victim-based statistics are “accurate.” Each measurement procedure has its characteristic errors, some of which it shares with the other. Comparisons of official and survey data on crime are helpful in revealing the dimensions of these error terms, and they point out the analyses which must be conducted if we are to specify their exact proportions. 相似文献
995.
996.
997.
998.
999.
1000.
G K Murphy 《The American journal of forensic medicine and pathology》1988,9(3):255-257
On 21 February 1890, two woodsmen working in densely wooded Blenheim Swamp in southern Ontario, Canada, stumbled upon the dead body of a young Englishman who had been killed by two gunshot wounds to the head. He was identified as Frederick Benwell by a married couple, the Birchalls, who had traveled with him and another man, Pelly, from England to New York City by ship about 1 week before. The Birchalls lied regarding Benwell's subsequent movements. Questioning Pelly revealed to Detective John Murray that both Pelly and Benwell had replied separately to Birchall's advertisement for young men of means to become partners with him in a large Canadian farm, a deposit first being required. Birchall had been observed taking Benwell from Buffalo, New York, to Blenheim Swamp, for in reality there was no farm. There he had shot Benwell, leaving the body partially exposed. He then tried unsuccessfully to lure Pelly to his death in Niagara Falls. The Birchalls were arrested. Reginald Birchall was tried, convicted, and hanged. His attempt, including murder, to turn the so-called farm pupil colonization scheme to his own benefit had been frustrated by the dogged work of the master Canadian detective Murray. 相似文献