全文获取类型
收费全文 | 688篇 |
免费 | 30篇 |
专业分类
各国政治 | 65篇 |
工人农民 | 31篇 |
世界政治 | 84篇 |
外交国际关系 | 47篇 |
法律 | 236篇 |
中国政治 | 4篇 |
政治理论 | 244篇 |
综合类 | 7篇 |
出版年
2021年 | 5篇 |
2020年 | 16篇 |
2019年 | 9篇 |
2018年 | 26篇 |
2017年 | 24篇 |
2016年 | 22篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 108篇 |
2012年 | 17篇 |
2011年 | 11篇 |
2010年 | 9篇 |
2009年 | 16篇 |
2008年 | 17篇 |
2007年 | 22篇 |
2006年 | 23篇 |
2005年 | 13篇 |
2004年 | 19篇 |
2003年 | 20篇 |
2002年 | 18篇 |
2001年 | 13篇 |
2000年 | 21篇 |
1999年 | 18篇 |
1998年 | 15篇 |
1997年 | 12篇 |
1996年 | 11篇 |
1995年 | 4篇 |
1994年 | 8篇 |
1993年 | 10篇 |
1992年 | 14篇 |
1991年 | 11篇 |
1990年 | 12篇 |
1989年 | 10篇 |
1988年 | 13篇 |
1987年 | 8篇 |
1986年 | 11篇 |
1985年 | 8篇 |
1984年 | 11篇 |
1983年 | 6篇 |
1981年 | 7篇 |
1980年 | 7篇 |
1979年 | 9篇 |
1978年 | 8篇 |
1976年 | 5篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1969年 | 3篇 |
1968年 | 6篇 |
1967年 | 4篇 |
1966年 | 4篇 |
排序方式: 共有718条查询结果,搜索用时 0 毫秒
61.
Fred Thompson 《Public administration review》2010,70(6):964-967
62.
63.
64.
65.
66.
Accidental poisonings involving carbon monoxide, heating systems, and confined spaces 总被引:2,自引:0,他引:2
Eleven incidents of carbon monoxide (CO) intoxication resulting in sixteen fatalities are reported. All of the cases involved heating systems as either the source or the means of distributing the CO. Blood samples were analyzed for ethanol and CO. Elevated blood CO saturations were found in 14 of the 16 victims while none of the victims had a blood ethanol concentration greater than 0.10% (w/v). 相似文献
67.
68.
We measured stable hydrogen isotope ratios in the primary feathers of two subspecies of goldfinches, confiscated by the Police and the Royal Society for the Prevention of Cruelty to Animals (RSPCA) on suspicion that they had been illegally taken from the wild. We found significant differences in the delta2H values of the two subspecies indicating that they were sourced from different geographical regions. Our results correlated with isotopic precipitation maps and with the known distribution of the two subspecies of goldfinch. We believe that this technique could be used by law enforcement agencies to determine the origin of birds in cases where the species or subspecies involved are geographically distinct. 相似文献
69.
70.
The results of grouping tests performed on blood samples collected over a five-year period at the Trinidad and Tobago Forensic Science Centre are presented. The samples were tested using the ABO, PGM, EAP and GLO blood group systems. Phenotypic frequencies and allele frequencies for each system were calculated for the two major ethnic groups of the population, the African and East Indian. Matching probabilities, which can be used in the interpretation of physical evidence in forensic cases, were also calculated. 相似文献