全文获取类型
收费全文 | 2190篇 |
免费 | 112篇 |
专业分类
各国政治 | 143篇 |
工人农民 | 110篇 |
世界政治 | 217篇 |
外交国际关系 | 117篇 |
法律 | 1045篇 |
中国政治 | 12篇 |
政治理论 | 639篇 |
综合类 | 19篇 |
出版年
2023年 | 11篇 |
2022年 | 6篇 |
2021年 | 19篇 |
2020年 | 47篇 |
2019年 | 57篇 |
2018年 | 72篇 |
2017年 | 91篇 |
2016年 | 75篇 |
2015年 | 60篇 |
2014年 | 83篇 |
2013年 | 333篇 |
2012年 | 75篇 |
2011年 | 101篇 |
2010年 | 63篇 |
2009年 | 80篇 |
2008年 | 64篇 |
2007年 | 85篇 |
2006年 | 86篇 |
2005年 | 86篇 |
2004年 | 75篇 |
2003年 | 87篇 |
2002年 | 82篇 |
2001年 | 44篇 |
2000年 | 44篇 |
1999年 | 38篇 |
1998年 | 40篇 |
1997年 | 39篇 |
1996年 | 30篇 |
1995年 | 35篇 |
1994年 | 33篇 |
1993年 | 21篇 |
1992年 | 21篇 |
1991年 | 16篇 |
1990年 | 24篇 |
1989年 | 14篇 |
1988年 | 25篇 |
1987年 | 16篇 |
1986年 | 9篇 |
1985年 | 18篇 |
1984年 | 16篇 |
1983年 | 12篇 |
1982年 | 7篇 |
1981年 | 9篇 |
1980年 | 11篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1976年 | 7篇 |
1973年 | 4篇 |
1970年 | 3篇 |
1967年 | 3篇 |
排序方式: 共有2302条查询结果,搜索用时 15 毫秒
71.
72.
Adam Lanzarotta Ph.D. Martin M. Kimani Ph.D. Michael D. Thatcher B.S. John Lynch Ph.D. Moseley Fulcher A.S. Mark R. Witkowski Ph.D. JaCinta S. Batson M.S. 《Journal of forensic sciences》2020,65(4):1274-1279
This study describes the performance of handheld Raman devices for determining whether suspect pharmaceutical tablets declared to contain controlled substances were consistent with authentic (CWA) or not consistent with authentic (NCWA) tablets using a simple, rapid, field-friendly method capable of being used by nonexperts. Twenty-five authentic products and 84 known NCWA tablets were examined using three “parent” devices for a total of 327 analyses. On average, the parent devices yielded a true pass rate of 100%, a true fail rate of 98.4%, a false pass rate of 1.6%, and a false fail rate of 0%. The methods/libraries were then transferred to 13 identical “daughter” devices, which were used to examine 10 suspect finished dosage forms in duplicate (six known NCWA tablets and four authentic tablets) for a total of 260 measurements. On average, the daughter devices had a true pass rate of 100%, a true fail rate of 95.5%, a false pass rate of 4.5%, and a false fail rate of 0.0%. These data demonstrate that the parent–daughter electronic transfer method was successful, which permits the ability to develop methods in the laboratory that can be seamlessly pushed out to field devices. The methods can then be used to (i) prioritize samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify active ingredients and (ii) help support the interdiction of dangerous tablets at ports of entry, thereby preventing them from reaching the supply chain. 相似文献
73.
Merrian J. Brooks DO MS Joshua Leskovac MS Mark F. Benedetto MS Elizabeth Miller MD PhD Edward P. Mulvey PhD 《Juvenile & family court journal》2020,71(4):53-62
Motivational interviewing (MI) is a communication style focused on enhancing clients’ own motivation towards change. In the justice system MI has evidence to support that it enhances communication and change behaviors in youth. As most MI training is designed for healthcare settings training and implementation of MI must be adapted to fit the juvenile justice model. This includes both rehabilitation and restorative justice. Here we describe the details that allowed one county small county in Pennsylvania to roll out MI training and initial skills review in less than 6 months. The case reviews the details of planning, trainings, and timing of activities. We then discuss what elements of those details fit into a greater implementation plan that may be applied elsewhere. Four key elements were instrumental to implementation: 1) appreciation of JPO time constraints, 2) cost containment 3) using blending to enhance JPO flexibility with MI use, and 4) policies that normalize use of MI. This outline may assist other courts in their own implementation efforts. 相似文献
74.
75.
African agriculture is often dominated by smallholder farms composed of multiple plots. In policy circles it is often assumed that fragmentation coupled with small farm size is an impediment to increasing yields and thus decreasing poverty and food insecurity. There also exists an influential literature that explores the inverse relationship between farm size and yield. While there are many studies internationally, few have been conducted in Africa. Using an Ethiopian national survey, we explore the relationship between yield, farm size and fragmentation. We find an inverse relationship between farm size and yield, and a positive association between yield and land fragmentation. 相似文献
76.
Indigenous Australians continue to experience entrenched disadvantage. Despite billions being spent, ‘Closing the Gap’ indicators remain resistant to change. It has become increasingly apparent that progress has been hindered by persistent administration and implementation issues in Indigenous Affairs, especially with the funding modalities deployed. This study uses the remote Queensland Indigenous community of Aurukun as a case study to examine the effectiveness and evaluation problems arising from overlapping programmes delivered to Aurukun children and youth (5–18 years of age). It documents programmatic crowding occurring in Aurukun, which has the potential to place considerable demands on the intended participants, and results in hybridised effects that are not understood. Within this context, robust evaluation – even through the use of sophisticated methods – is near impossible. 相似文献
77.
In 2010, this journal published an early exposition of inclusive masculinity theory. Since then, the theory has been widely adopted within both the sport and masculinities literature. Furthermore, a large number of other scholars not using the theory have also documented and labelled new masculinity types. There has also been refinement of Inclusive Masculinity Theory, alongside theoretical critiques. In this article, we provide an overview of the genesis of the theory and its refinement, before considering and responding to published and unpublished critiques of the theory. We then suggest future directions for research. 相似文献
78.
Inclusive growth is contested yet adopted by the World Bank to reduce poverty and inequality through rapid economic growth. Research has tested inclusive growth in sectors including agriculture, but few studies apply it to tourism which is significant for many developing countries. The paper interrogates tourism-led inclusive growth: supply chains, economic linkages/leakage, ownership, employment and expenditure. It draws from fieldwork in Vietnam where tourism has rapidly developed with partial economic benefits for local communities, but does not appear to fall within the inclusive growth paradigm. It is unclear if tourism-led growth will become any more inclusive in the short-to-medium term. 相似文献
79.
- In a time of profound national challenge and change, it is important to promote a new definition of active citizenship locally, nationally and globally. As the effects of economic, political and social globalization continue to underscore interdependence, the imperative of fostering democratic minds among a citizenry is evermore important. It is essential to conceive a common future that encourages the participation of all American citizens; inviting diversity as an asset and broadly reawakening the call to leverage the rich potentials of pluralism in search of common solutions. However, many schools are retreating from basic civics lessons and are not teaching students how to become active citizens. More importantly, public institutions overall do not appear to be advancing the fundamental awareness and skills required for sifting through political hucksterism, opinion masquerading as news and political spin. It is essential for our schools and public institutions to teach the responsibilities and joy of active citizenship. To meet the challenges of democratic cooperation and social cohesion, leaders and citizens alike should be taught and encouraged to openly question, to critique and even to criticize the status quo. The means for cultivating and institutionalizing such habits on a broad scale involves educational reformation and initiatives in civics and citizenship education to increase opportunities for meaningful public engagement. These are by no means the only answer, but they are a critical component for meeting the challenges of truly inclusive and active representative democracy where out of many, we are one.
80.
Michael J. Cleveland Mark E. Feinberg Mark T. Greenberg 《Journal of youth and adolescence》2010,39(2):114-126
This study used data from a sample of 6th to 12th grade students (N = 48,641, 51% female), nested in 192 schools, to determine if the influence of family-based protective factors varied across
different school contexts. Hierarchical logistic regression models were used to examine the effects of individual-level family
protective factors, relative to school-level aggregates of the same factors, on recent (past 30 days) use of cigarettes, alcohol,
and marijuana. Cross-level interactions indicated that the effect of the student’s level of family protection, relative to
other students in their school, differed depending on the aggregated school level of family protection. The results suggested
that the benefit of belonging to a well-functioning family was more influential for students attending schools characterized
by higher-than-average aggregated levels of protection compared to students attending schools of lower-than-average protection.
Thus, family-level factors offered less protection for students in relatively high-risk school contexts. These results were
consistent with a protective–reactive interaction and suggest that a thorough understanding of adolescent substance use must
consider the complex interplay among adolescents, their families, and their social environments. 相似文献