全文获取类型
收费全文 | 933篇 |
免费 | 37篇 |
专业分类
各国政治 | 35篇 |
工人农民 | 81篇 |
世界政治 | 55篇 |
外交国际关系 | 50篇 |
法律 | 465篇 |
中国政治 | 10篇 |
政治理论 | 257篇 |
综合类 | 17篇 |
出版年
2022年 | 3篇 |
2021年 | 8篇 |
2020年 | 15篇 |
2019年 | 14篇 |
2018年 | 28篇 |
2017年 | 38篇 |
2016年 | 36篇 |
2015年 | 23篇 |
2014年 | 37篇 |
2013年 | 143篇 |
2012年 | 26篇 |
2011年 | 35篇 |
2010年 | 20篇 |
2009年 | 15篇 |
2008年 | 38篇 |
2007年 | 40篇 |
2006年 | 37篇 |
2005年 | 24篇 |
2004年 | 34篇 |
2003年 | 34篇 |
2002年 | 25篇 |
2001年 | 14篇 |
2000年 | 21篇 |
1999年 | 15篇 |
1998年 | 11篇 |
1997年 | 14篇 |
1996年 | 12篇 |
1995年 | 10篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 7篇 |
1991年 | 12篇 |
1990年 | 8篇 |
1989年 | 11篇 |
1988年 | 10篇 |
1987年 | 6篇 |
1986年 | 7篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 11篇 |
1982年 | 10篇 |
1981年 | 13篇 |
1980年 | 11篇 |
1979年 | 10篇 |
1978年 | 6篇 |
1977年 | 6篇 |
1976年 | 6篇 |
1973年 | 4篇 |
1972年 | 3篇 |
1971年 | 3篇 |
排序方式: 共有970条查询结果,搜索用时 31 毫秒
931.
932.
This study examines the influence of the organizational strategy used to structure opening statements and closing arguments on presentation effectiveness in a simulated civil trial. Two organizational structures, a narrative and a legal-expository format, were manipulated to produce a 2 (plaintiff organizational strategy) × 3 (defense organizational strategy) experimental design. Results indicate that a mixed organizational strategy (narrative opening/legal-expository closing) is more effective for the plaintiff than a strict narrative strategy, and either a mixed or strict legal-expository organizational strategy is more effective than a strict narrative strategy for the defense. 相似文献
933.
934.
935.
Hypertension is a growing medical concern in the United States. With the number of Americans suffering from hypertension increasing, the use of antihypertensives such as beta-blockers is increasing as well. In fact, three beta-blockers - atenolol, metoprolol and propranolol - were among the 200 most prescribed medications in the United States in 2003. Pilots that successfully manage their hypertension can remain certified to fly. The Federal Aviation Administration currently designates approximately 8% of active pilots as "hypertensive with medication". The Civil Aerospace Medical Institute (CAMI) performs toxicological evaluation on victims of fatal aviation accidents. At CAMI beta-blockers are analyzed using gas chromatography with mass spectrometric detection. We have, however, recently developed a liquid chromatography with mass spectrometric detection (LC/MS) method for the simultaneous quantitation of three commonly prescribed beta-blockers, atenolol, metoprolol and propranolol. One advantage of our LC/MS method is the specificity provided by an ion trap MS. Utilizing an ion trap MS, we were able to conduct MS/MS and MS/MS/MS on each analyte. This method also eliminates the time-consuming and costly derivitization step necessary during GC/MS analysis. Additionally, by utilizing this novel method, any concerns about beta-blocker metabolite and/or sample matrix interference are eliminated. The limits of detection for this method ranged from 0.39 to 0.78 ng/mL and the linear dynamic range was generally 1.6-3200 ng/mL. The extraction efficiencies for each analyte ranged from 58% to 82%. This method was successfully applied to postmortem fluid and tissue specimens obtained from victims of three separate aviation accidents. 相似文献
936.
This study evaluated the frequency of coarrest in female victims who utilized 911 for intimate partner violence (IPV) and any patterns or circumstances that increased the likelihood of coarrest. All cases of police-documented IPV where a female IPV victim was arrested in conjunction with the perpetrator were included. Each incident report was reviewed to determine demographic characteristics of the victim, weapon and substance involvement, presence of children, and violence severity. Of IPV victims, 9% (131 of 1,489) were arrested. Having a weapon, alcohol use, not being married, and older age were associated with increased likelihood of arrest (p < .001). The presence of a child decreased the likelihood of victim arrest (p < .001). Race, prior incidents of IPV, offender restraining order, and incident severity were not significantly associated with coarrest. Although coarrest occurred in a minority of cases, it may deter victims from contacting police for future incidents of police. 相似文献
937.
The study was a cross-sectional examination of African American women positive for intimate partner violence (IPV) who presented to the medical or psychiatric emergency department (ED) for treatment. African American women with a recent history of IPV who presented following an attempted suicide (n = 100) were compared to demographically comparable African American women who were IPV positive who had not attempted suicide and presented for treatment of another condition(n= 100). Women completed face-to-face interviews on several measures, including demographics and the Beck Depression Inventory-II (BDI-II). Overall, there were no demographic differences between cases and controls. Attempters reported statistically significant higher scores on all 21 BDI-II items than did nonattempters. Four BDI-II items had effect size values in the medium range: sadness, self-dislike, suicidal thoughts, and feelings of worthlessness. These four items can be used as a brief screen in the ED to detect female patients positive for IPV at increased risk for suicidal behavior. 相似文献
938.
Trish?WilliamsEmail author Jennifer?Connolly Debra?Pepler Wendy?Craig 《Journal of youth and adolescence》2005,34(5):471-482
The present study examined the link between sexual orientation and adjustment in a community sample of 97 sexual minority
(gay male, lesbian, bisexual, and questioning) high school students, taking into account their experiences of peer victimization
and social support within peer and family contexts. Adolescents were identified in a large-scale survey study conducted at
5 high schools. They were matched to a comparison sample of their heterosexual peers. Sexual minority adolescents reported
more externalizing behaviors and depression symptoms than heterosexual youth. Compared to their heterosexual peers, sexual
minority youth reported more sexual harassment, more bullying, less closeness with their mothers, and less companionship with
their best friends. There were no significant differences between gay male, lesbian, bisexual, and questioning adolescents.
Overall, both victimization and social support mediated the link between sexual orientation and psychosocial symptoms. Among
sexual minority youth, the link between social support and externalizing was mediated by experiences of peer victimization.
These findings highlight the contextual risk and protective factors associated with non-heterosexual sexual orientation in
accounting for the emotional and behavioral problems in this population.
Ms. Williams completed her M.A. in Clinical-Developmental Psychology at York University in Toronto, Ontario. She is currently
working on her Ph.D. Her research interests include adolescent sexual orientation, adolescent romantic relationships, and
dating violence.
Dr. Connolly is a Professor of Psychology at York University. She received her Ph.D. from Concordia University and is a Registered
Psychologist in the Province of Ontario. Her current research examines adolescent romantic relationships and the peer context.
Dr. Pepler is a Professor of Psychology at York University and Psychologist at the Hospital for Sick Children in Toronto.
She received her Ph.D. from the University of Waterloo and is a Registered Psychologist in the Province of Ontario. Her current
research examines aggression and victimization among adolescents with a concern to the processes related to these problems
over the lifespan.
Dr. Craig is a Professor of Psychology at Queen's University. She received her Ph.D. from York University and is a Registered
Psychologist in the Province of Ontario. Her current research examines bullying, victimization, aggression, juvenile delinquency,
peer relations, and the development of intervention programs. 相似文献
939.
940.