全文获取类型
收费全文 | 15258篇 |
免费 | 499篇 |
专业分类
各国政治 | 930篇 |
工人农民 | 564篇 |
世界政治 | 1194篇 |
外交国际关系 | 610篇 |
法律 | 8820篇 |
中国共产党 | 2篇 |
中国政治 | 171篇 |
政治理论 | 3312篇 |
综合类 | 154篇 |
出版年
2020年 | 190篇 |
2019年 | 234篇 |
2018年 | 336篇 |
2017年 | 345篇 |
2016年 | 359篇 |
2015年 | 289篇 |
2014年 | 301篇 |
2013年 | 1800篇 |
2012年 | 360篇 |
2011年 | 465篇 |
2010年 | 363篇 |
2009年 | 383篇 |
2008年 | 393篇 |
2007年 | 374篇 |
2006年 | 381篇 |
2005年 | 340篇 |
2004年 | 355篇 |
2003年 | 388篇 |
2002年 | 310篇 |
2001年 | 542篇 |
2000年 | 483篇 |
1999年 | 432篇 |
1998年 | 237篇 |
1997年 | 196篇 |
1996年 | 172篇 |
1995年 | 171篇 |
1994年 | 177篇 |
1993年 | 180篇 |
1992年 | 263篇 |
1991年 | 294篇 |
1990年 | 262篇 |
1989年 | 264篇 |
1988年 | 276篇 |
1987年 | 300篇 |
1986年 | 290篇 |
1985年 | 281篇 |
1984年 | 269篇 |
1983年 | 280篇 |
1982年 | 187篇 |
1981年 | 158篇 |
1980年 | 163篇 |
1979年 | 188篇 |
1978年 | 141篇 |
1977年 | 120篇 |
1976年 | 128篇 |
1975年 | 114篇 |
1974年 | 117篇 |
1973年 | 109篇 |
1972年 | 103篇 |
1969年 | 101篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
The psychological assessment battery is an integral part of the selection process used to select patrol officer applicants.
Unlike all other procedures used in the selection process, the psychological assessment has not been adequately validated.
The purpose of this study was an attempt to provide validation data for a psychological assessment battery. The battery consisted
of the Nelson-Denny, Shipley-Hartford, MMPI, and the Motivational Analysis Test (MAT). Performance measures included various
measures of training academy performance and field training performance. A stepwise regression and MANOVA/Discriminant Analysis
indicated that the psychological tests did predict performance, although an exact predictive equation could not be developed
due to the high intercorrelations between predictor variables.
This research was sponsored in part by a grant from the School of Applied Arts and Technology, Southwest Texas State University. 相似文献
92.
The concentration of thyreoglobulin (tg) was determined for death caused by hanging, strangulation by ligature, and throttling. Cases of sudden death (traumatic aortic rupture, penetrating wounds of the heart) were used for comparison. The mean values in cases of hanging (149.9±202.3 ng/ml), strangulation by ligature (193.1±173.3), manual strangulation (561.6±173.9) are distinguishable from violent acute deaths (23.3±27.6) and living healthy individuals (17.3±16.1). By means of statistical comparisons, significant differences were found between throttling and strangulation by ligature and between throttling and hanging (adjusted P<0.001). In connection with examination of the bodies high tg values can be regarded as a vital reaction in obstructive asphyxia. 相似文献
93.
A growing body of evidence shows that minorities are disproportionately the targets of police brutality, but important theoretical questions about the causes of that inequity remain unanswered. One promising line of research involves structural‐level analyses of the incidence of police brutality complaints; however, existing studies do not incorporate variables from alternative theoretical explanations. Drawing on the community accountability hypothesis and the threat hypothesis, we tested the predictions of two prominent structural‐level explanations of police brutality in a study of civil rights criminal complaints. The study included cities of 150,000+ population (n = 114). The findings reveal that two community accountability variables—ratio percent Hispanic citizens to percent Hispanic police officers and the presence of citizen review—were related positively to police brutality complaints, partially supporting that perspective. Two threat hypothesis measures of threatening people—percent black and percent Hispanic (in the Southwest)—were related positively to complaints, as predicted. The relative degree of support for the two hypotheses is assessed. 相似文献
94.
A number of recent studies have explored the consequences ofinterracial peer effects on the academic and social performanceof minority students. This article contributes to that discussion,focusing, however, on perceptions rather than behaviors. Theanalysis suggests that exposure to white peers is associatedwith declining perceptions of racial justice among black andLatino high school students. While cautioning against causalinterpretations of this finding, the article suggests that theintegrationist aims of Brown v. Board of Education will notbe satisfied without more thoughtful and vigorous desegregationefforts. 相似文献
95.
Modern capital jurisprudence places special significance on judicial instructions to guide the discretion of the capital jury in reaching a penalty phase decision. Yet, previous social science research has raised doubts about the extent to which judicial instructions are generally understood by jurors and questioned their utility in producing intended effects. The present study measured the comprehension of the capital sentencing instruction employed in California. Data suggest widespread inability to define accurately the central concepts of aggravation and mitigation in use in virtually every state that currently has a death penalty statute, as well as the inability to distinguish properly the sentencing significance of the enumerated factors jurors are directed to use in reaching their life and death verdicts. In addition, an inordinate focus on the circumstances of the crime—to the exclusion of other potentially important factors—was identified, as well as special problems in comprehending the crucial concept of mitigation in constitutionally required ways.We would like to thank Suzanne Ban, Cori Nardello, and Maryanne Tagavilla for assistance in transcribing and content-analyzing the data. 相似文献
96.
97.
Andrew M. Greeley is a priest, sociologist, novelist, and journalist. His scholarly writings concentrate on religion and ethnicity.
His other writings range from critiques of the Catholic church to best-selling novels. 相似文献
98.
99.
100.
A report of an international collaborative experiment to demonstrate the uniformity obtainable using DNA profiling techniques. 总被引:2,自引:0,他引:2
P Gill S Woodroffe W B?r B Brinkmann A Carracedo B Eriksen S Jones A D Kloosterman B Ludes B Mevag 《Forensic science international》1992,53(1):29-43
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP). 相似文献