全文获取类型
收费全文 | 1103篇 |
免费 | 44篇 |
专业分类
各国政治 | 83篇 |
工人农民 | 78篇 |
世界政治 | 92篇 |
外交国际关系 | 72篇 |
法律 | 538篇 |
中国政治 | 12篇 |
政治理论 | 258篇 |
综合类 | 14篇 |
出版年
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 12篇 |
2020年 | 26篇 |
2019年 | 32篇 |
2018年 | 48篇 |
2017年 | 55篇 |
2016年 | 51篇 |
2015年 | 30篇 |
2014年 | 34篇 |
2013年 | 219篇 |
2012年 | 35篇 |
2011年 | 53篇 |
2010年 | 45篇 |
2009年 | 39篇 |
2008年 | 44篇 |
2007年 | 42篇 |
2006年 | 39篇 |
2005年 | 37篇 |
2004年 | 29篇 |
2003年 | 16篇 |
2002年 | 30篇 |
2001年 | 16篇 |
2000年 | 14篇 |
1999年 | 16篇 |
1998年 | 15篇 |
1997年 | 13篇 |
1996年 | 10篇 |
1995年 | 10篇 |
1994年 | 12篇 |
1993年 | 14篇 |
1991年 | 12篇 |
1990年 | 10篇 |
1989年 | 9篇 |
1988年 | 3篇 |
1987年 | 4篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 8篇 |
1983年 | 7篇 |
1982年 | 8篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1967年 | 1篇 |
1966年 | 3篇 |
1939年 | 1篇 |
排序方式: 共有1147条查询结果,搜索用时 15 毫秒
31.
Suicide is the second leading cause of death for older adolescents and young adults. Although empirical literature has identified important risk factors of suicidal behavior, it is less understood if changes in risk factors correspond with changes in suicide risk. To address this knowledge gap, we assessed if there were different trajectories of suicidal behavior as youth transition into young adulthood and determined what time-varying risk factors predicted these trajectories. This study used four waves of data spanning approximately 13 years from the National Longitudinal Study of Adolescent Health. The sample included 9027 respondents who were 12–18 years old (M?=?15.26; SD?=?1.76) at Wave 1, 50% male, 17% Hispanic, and 58% White. The results indicated that 93.6% of the sample had a low likelihood for suicide attempts across time, 5.1% had an elevated likelihood of attempting suicide in adolescence but not young adulthood, and 1.3% had an elevated likelihood of attempting suicide during adolescence and adulthood. The likelihood of a suicide attempt corresponded with changes on depression, impulsivity, delinquency, alcohol problems, family and friend suicide history, and experience with partner violence. Determining how suicide risk changes as youth transition into young adulthood and what factors predict these changes can help prevent suicide. Interventions targeting these risk factors could lead to reductions in suicide attempts. 相似文献
32.
We investigate the welfare and productivity implications of private sustainability standards in the coffee sector in Uganda. We use cross-sectional household survey data and an instrumental variable method with instruments that pass weak identification and over-identification restrictions. We find that triple Utz-Rainforest Alliance-4C certification increases income, and land and labour productivity, and reduces poverty. Double Fairtrade-Organic certification is found to be associated with higher producer prices but results in lower land and labour productivity, and thereby fails to increase producer income and contribute to poverty reduction. We conclude that private sustainability standards do not always live up the expectations they create towards consumers. 相似文献
33.
Alice Evans 《Third world quarterly》2017,38(7):1619-1638
This paper explores how gender ideologies shape industrial relations in the Asian garment industry. Drawing on ethnographic research, it illustrates how widespread norm perceptions of acquiescent women and assertive men reinforce patriarchal, authoritarian unions. Even if privately critical, women may be reluctant to protest if they anticipate social disapproval. Such beliefs reinforce patriarchal unions, curbing women workers’ collective analysis, engagement, and activism. This weakens the collective power of labour to push for better working conditions. Tackling norm perceptions and building more inclusive unions may help strengthen the labour movement. 相似文献
34.
Schnavia Smith Hatcher Dione Moultrie King Sara Z. Evans LaTonya M. Summers 《Child & Youth Services》2017,38(4):302-317
This study investigated the association between risky sexual behavior and drug use among female youth sentenced to a regional juvenile detention center. Preincarceration behavioral health risk data were collected from a modified version of the Youth Risk Behaviors Surveillance Survey completed by respondents. Almost all of the 105 participants had been detained before their current sentence, more than half of them were sexually active before the age of 13, and 70% had smoked marijuana or drank alcohol by age 14. A regression analysis was conducted to determine if preincarceration sexual health risk behaviors were significant enough to predict continued risk behaviors related to pregnancy, disease prevention, and substance use. Findings indicate that youth detention-based prevention programs should emphasize sexual and drug-risk reduction strategies as a means to reduce risky behaviors for this population. 相似文献
35.
Joám Evans Pim 《Journal of Peace Education》2018,15(3):325-344
ABSTRACTFor decades Hip Hop cultural practices have been disparaged for allegedly inciting and being responsible for the eruption of urban violence. This assumption, likely built upon pre-existing biases regarding the street culture and ethnic minorities where Hip Hop emerged, ignored how some of the genre’s main elements – particularly freestyle rap, breakin’ or breakdancing and graffiti tagging – initially served the purpose of providing at-risk youths with real alternatives to direct physical violence in their day-to-day lives, and continue do so today. It has also ignored broader analogies with other cross-cultural and cross-species manifestations of similar practices that have served for millennia as effective mechanisms for reducing the likelihood of potentially lethal violence. By presenting these manifestations – namely song dueling and mark making – in comparative terms with Hip Hop’s freestyle song and dance battles and tagging territorial contests, this article seeks to highlight the relevance and potential of Hip Hop for preventing violence while also suggesting a common evolutionary backdrop within the context of strategies aimed at minimizing intraspecific aggression. 相似文献
36.
This study examined the mediated and moderated effects of a universal family-focused preventive intervention, delivered during young adolescence, on internalizing symptoms assessed in young adulthood. Sixth grade students (N=446; 52% female; 98% White) and their families from 22 rural Midwestern school districts were randomly assigned to the experimental conditions in 1993. Self-report questionnaires were administered at seven time points (pre-test to young adulthood-age 21) to those receiving the Iowa Strengthening Families Program (ISFP) and to the control group. Results showed that growth factors of adolescent internalizing symptoms (grades 6-12) were predicted by ISFP condition and risk status (defined as early substance initiation). Moderation of the condition effect by risk status was found, with higher-risk adolescents benefitting more from the ISFP. Results also supported the hypothesis that the ISFP's effect on internalizing symptoms in young adulthood was mediated through growth factors of adolescents' internalizing symptoms; risk moderation, however, was only marginally significant in young adulthood. The relative reduction rate on clinical or subclinical levels of young adult internalizing symptoms was 28%, indicating that for every 100 young adults displaying clinical or subclinical levels of internalizing symptoms from school districts not offering an intervention, there could be as few as 72 displaying those levels of symptoms in school districts that offered middle school prevention programming. These findings highlight how the positive effects of family-focused universal interventions can extend to non-targeted outcomes and the related potential public-health impact of scaling up these interventions. 相似文献
37.
38.
39.
40.
Kevin J. Farrugia Ph.D. Danielle Hunter B.Sc. Clarice Wilson B.Sc. Stef Hay B.Sc. Paul Sherriffs B.Sc. Paul Deacon B.Sc. 《Journal of forensic sciences》2020,65(1):248-254
This study presents a number of pseudo-operational trials on plastic bags investigating the double- and co-fuming process of a one-step fluorescent cyanoacrylate (LumicyanoTM) in comparisons with the two-step process with basic yellow 40 (BY40) staining for the detection of latent fingermarks. The results demonstrate that both Lumicyano solution and dye contribute to the increased detection of latent fingermarks during the double-fuming process (trial 1). Co-fuming the Lumicyano solution and dye separately (at a concentration of 8%) but simultaneously was less effective than 8% Lumicyano (trial 2). Co-fuming Lumicyano 8% and an additional 8% Lumicyano dye by weight was more effective than Lumicyano 8% (trial 3), possibly due to increased fluorescent material deposition during co-fuming allowing for better visualization. The use of BY40 after Lumicyano resulted in a considerable increase in detected fingermarks. 相似文献