全文获取类型
收费全文 | 6120篇 |
免费 | 137篇 |
专业分类
各国政治 | 173篇 |
工人农民 | 358篇 |
世界政治 | 323篇 |
外交国际关系 | 203篇 |
法律 | 4201篇 |
中国政治 | 32篇 |
政治理论 | 940篇 |
综合类 | 27篇 |
出版年
2023年 | 37篇 |
2020年 | 58篇 |
2019年 | 76篇 |
2018年 | 183篇 |
2017年 | 111篇 |
2016年 | 203篇 |
2015年 | 89篇 |
2014年 | 95篇 |
2013年 | 428篇 |
2012年 | 236篇 |
2011年 | 218篇 |
2010年 | 102篇 |
2009年 | 141篇 |
2008年 | 127篇 |
2007年 | 127篇 |
2006年 | 137篇 |
2005年 | 464篇 |
2004年 | 202篇 |
2003年 | 124篇 |
2002年 | 95篇 |
2001年 | 223篇 |
2000年 | 208篇 |
1999年 | 157篇 |
1998年 | 62篇 |
1997年 | 62篇 |
1996年 | 57篇 |
1995年 | 53篇 |
1994年 | 59篇 |
1993年 | 52篇 |
1992年 | 135篇 |
1991年 | 124篇 |
1990年 | 153篇 |
1989年 | 157篇 |
1988年 | 156篇 |
1987年 | 151篇 |
1986年 | 127篇 |
1985年 | 124篇 |
1984年 | 91篇 |
1983年 | 82篇 |
1982年 | 54篇 |
1981年 | 48篇 |
1980年 | 43篇 |
1979年 | 58篇 |
1978年 | 46篇 |
1975年 | 42篇 |
1974年 | 63篇 |
1973年 | 41篇 |
1972年 | 38篇 |
1971年 | 40篇 |
1970年 | 40篇 |
排序方式: 共有6257条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
75.
76.
77.
78.
The article deals with experimental data on design of the method used for detection of sperm, blood and vaginal secretions according to isoelectric points of acid phosphatases, differential diagnosis of ABO group antigens in "mixed" stains as well as detection of phenotype of red cell acid phosphatase by isoelectric focusing method. 相似文献
79.
The authors reviewed at autopsy the causes of death of 274 patients with evidence of intravenous drug abuse who had been admitted to a large public hospital. There were 127 who died from diseases unrelated to intravenous drug abuse, and in 41% of these, chronic alcoholism was implicated. Deaths from overdose syndromes and drug-related organ pathology comprised only 11% of all cases. The mean age at death was 39 years. There was a male/female ratio of 3.6:1. Half of all patients died from infection--72 from acquired immunodeficiency syndrome (AIDS) alone. These findings indicate that persons hospitalized with a history of intravenous drug abuse usually die from causes other than overdose and that AIDS and chronic alcoholism are significant problems. Emphasis should be placed upon detecting "hidden" intravenous drug deaths to provide more accurate statistical information. 相似文献
80.
A risk marker analysis of assaulted wives 总被引:1,自引:0,他引:1
In the wife assault literature, a number of risk markers have been identified. Using the data of the female respondents to the National Family Violence Survey (n = 699), a multivariate analysis was performed to examine which risk factors best differentiated between women involved in nonviolent relationships, verbally aggressive relationships, relationships exhibiting minor physical aggression and severely violent relationships. High levels of marital conflict and lower socioeconomic status emerged as the primary predictors of an increased likelihood of wife assault. Research implications are discussed. 相似文献