全文获取类型
收费全文 | 4205篇 |
免费 | 187篇 |
专业分类
各国政治 | 233篇 |
工人农民 | 112篇 |
世界政治 | 441篇 |
外交国际关系 | 231篇 |
法律 | 1857篇 |
中国政治 | 20篇 |
政治理论 | 1459篇 |
综合类 | 39篇 |
出版年
2021年 | 22篇 |
2020年 | 47篇 |
2019年 | 58篇 |
2018年 | 98篇 |
2017年 | 112篇 |
2016年 | 146篇 |
2015年 | 89篇 |
2014年 | 81篇 |
2013年 | 636篇 |
2012年 | 119篇 |
2011年 | 98篇 |
2010年 | 116篇 |
2009年 | 127篇 |
2008年 | 117篇 |
2007年 | 134篇 |
2006年 | 133篇 |
2005年 | 124篇 |
2004年 | 117篇 |
2003年 | 115篇 |
2002年 | 116篇 |
2001年 | 72篇 |
2000年 | 88篇 |
1999年 | 72篇 |
1998年 | 98篇 |
1997年 | 76篇 |
1996年 | 43篇 |
1995年 | 74篇 |
1994年 | 67篇 |
1993年 | 68篇 |
1992年 | 72篇 |
1991年 | 56篇 |
1990年 | 56篇 |
1989年 | 64篇 |
1988年 | 63篇 |
1987年 | 74篇 |
1986年 | 61篇 |
1985年 | 76篇 |
1984年 | 62篇 |
1983年 | 51篇 |
1982年 | 54篇 |
1981年 | 53篇 |
1980年 | 41篇 |
1979年 | 43篇 |
1978年 | 37篇 |
1977年 | 34篇 |
1976年 | 26篇 |
1975年 | 23篇 |
1974年 | 23篇 |
1973年 | 24篇 |
1969年 | 20篇 |
排序方式: 共有4392条查询结果,搜索用时 304 毫秒
141.
Hafen CA Allen JP Mikami AY Gregory A Hamre B Pianta RC 《Journal of youth and adolescence》2012,41(3):245-255
Student engagement is an important contributor to school success, yet high school students routinely describe themselves as
disengaged. Identifying factors that alter (increase) engagement is a key aspect of improving support for student achievement.
This study investigated students’ perceptions of autonomy, teacher connection, and academic competence as predictors of changes
in student engagement within the classroom from the start to the end of a course. Participants were 578 (58% female) diverse
(67.8% White, 25.2% African American, 5.1% Hispanic, 1.2% Asian American) high school students from 34 classrooms who provided
questionnaire data both at the start and the end of a single course. Novel results from a cross-lagged model demonstrated
that students who perceived their classrooms as allowing and encouraging their own autonomy in the first few weeks increased
their engagement throughout the course, rather than the typical decline in engagement that was demonstrated by students in
other classrooms. This finding is unique in that it extended to both students’ perceptions of engagement and observations
of student engagement, suggesting a fairly robust pattern. The pertinence of this finding to adolescent developmental needs
and its relationship to educational practice is discussed. 相似文献
142.
Evidence suggests that lesbian and gay young adults use substances more frequently than their heterosexual peers. Based on
the life course perspective, we argue that this difference may be due to the unavailability of marriage as a turning point
in the lives of lesbian/gay young adults. We use data from a nationally representative sample of youth (N = 13,581, 52.4% female, 68.6% white, ages 18—26) to examine sexual orientation differences in substance use and explore whether
these differences vary by romantic partnership formation in young adulthood. We find that the formation of more serious partnerships
(e.g., cohabitation, marriage) is associated with less frequent substance use among heterosexual young adults, though this
pattern does not hold for lesbian and gay young adults. We conclude that the partnership options available to lesbians and
gay men do not provide the same health-protective benefits that marriage does for heterosexuals. 相似文献
143.
Robert Ledger 《Diplomacy & Statecraft》2019,30(1):50-69
This analysis charts the changes in British aid policy under the Margaret Thatcher government (1979–1990). In particular, it examines the impact of so-called neo-liberal ideology in overseas development strategy in an era where “structural adjustment”—aid in return for market-based reforms—became World Bank and International Monetary Fund orthodoxy. There is some evidence to show British increases in multilateral aid during the 1980s supported a neo-liberal aid policy. Bilateral aid policy, however, demonstrated a subordination of aid to foreign policy and a pro-business—not ideologically pro-market or neo-liberal—alignment. One of the results of these structural changes was the Pergau Dam scandal at the end of the Thatcher years. 相似文献
144.
Adrian Robert Bazbauers 《国际公共行政管理杂志》2019,42(1):28-40
This article demonstrates that World Bank internal learning has led to significant changes in how the organization interacts with government officials through survey missions. Reviewing evidence of institutional learning and associated changes in practice and focusing on the relational modes being manifest in technical assistance, the article identifies three main phases of World Bank survey missions: general survey missions (1940s–1960s), country assistance strategies (1990s–2000s), and country partnership frameworks (2010s). Overall, World Bank reviews have repeatedly highlighted the importance of non-hierarchical interactions between Bank staff and country officials. In recent years, practice has begun to catch up with these operational insights. 相似文献
145.
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
146.
Robert G. Wallace 《Capitalism Nature Socialism》2018,29(3):21-35
In the second of our two-part review of Vladimir Lenin’s 1917 study of American agriculture, we extrapolate upon Alexander Chayanov’s neoliberal appropriation, Giovanni Arrighi’s treatment of partial proletarianization, the propagandistic “family farm,” agribusiness’s fluctuating territorial embeddedness, agriculture as an industry, and land and rent as commodities themselves. We finish by deploying Lenin’s alternate history as a Benjaminian détournement in the face of what now appear insurmountable obstacles. An alternate food future is not only possible, it is already underway. 相似文献
147.
148.
149.
150.
Scraping by: Income and Program Participation After the Loss of Extended Unemployment Benefits 下载免费PDF全文
Many Unemployment Insurance (UI) recipients do not find new jobs before exhausting their benefits, even when benefits are extended during recessions. Using Survey of Income and Program Participation (SIPP) panel data covering the 2001 and 2007 to 2009 recessions and their aftermaths, we identify individuals whose jobless spells outlasted their UI benefits (exhaustees) and examine household income, program participation, and health‐related outcomes during the six months following UI exhaustion. For the average exhaustee, the loss of UI benefits is only slightly offset by increased participation in other safety net programs (e.g., food stamps), and family poverty rates rise substantially. Self‐reported disability also rises following UI exhaustion. These patterns do not vary dramatically across household demographic groups, broad income level prior to job loss, or the two business cycles. The results highlight the unique, important role of UI in the U.S. social safety net. 相似文献