全文获取类型
收费全文 | 13613篇 |
免费 | 160篇 |
国内免费 | 124篇 |
专业分类
教育 | 9062篇 |
科学研究 | 1410篇 |
各国文化 | 117篇 |
体育 | 2100篇 |
综合类 | 19篇 |
文化理论 | 142篇 |
信息传播 | 1047篇 |
出版年
2022年 | 115篇 |
2021年 | 162篇 |
2020年 | 291篇 |
2019年 | 418篇 |
2018年 | 562篇 |
2017年 | 564篇 |
2016年 | 488篇 |
2015年 | 343篇 |
2014年 | 371篇 |
2013年 | 2327篇 |
2012年 | 355篇 |
2011年 | 311篇 |
2010年 | 268篇 |
2009年 | 285篇 |
2008年 | 262篇 |
2007年 | 243篇 |
2006年 | 266篇 |
2005年 | 218篇 |
2004年 | 420篇 |
2003年 | 401篇 |
2002年 | 369篇 |
2001年 | 434篇 |
2000年 | 261篇 |
1999年 | 183篇 |
1998年 | 131篇 |
1997年 | 115篇 |
1996年 | 124篇 |
1995年 | 131篇 |
1994年 | 127篇 |
1993年 | 93篇 |
1992年 | 159篇 |
1991年 | 132篇 |
1990年 | 150篇 |
1989年 | 170篇 |
1988年 | 128篇 |
1987年 | 140篇 |
1986年 | 127篇 |
1985年 | 140篇 |
1984年 | 127篇 |
1983年 | 128篇 |
1982年 | 103篇 |
1981年 | 87篇 |
1980年 | 93篇 |
1979年 | 141篇 |
1978年 | 94篇 |
1977年 | 76篇 |
1976年 | 97篇 |
1975年 | 72篇 |
1974年 | 79篇 |
1973年 | 71篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
981.
Analía Inés Meo 《British Journal of Sociology of Education》2011,32(3):349-367
This article examines how students from the ‘loser’ sections of the middle class dealt with the game of secondary schooling in a ‘good’ state school in the city of Buenos Aires (Argentina). It engages with Bourdieu’s theory of social practice and, in particular, with its concepts of game, habitus and cultural capital. It argues that middle‐class students embody a school habitus, which I call zafar. Zafar (a Spanish slang word) refers to students’ dispositions, practices and strategies towards social and educational demands of teachers and their school. Zafar propels middle‐class students to be just ‘good enough’ students, and promote an instrumental approach to schooling and learning. Although this paper offers an account within which the reproduction of relative educational advantage of a group of middle‐class students takes place, it also poses questions about their future educational and occupational opportunities. 相似文献
982.
983.
In this article, we quantitatively assess education policy change in OECD countries. While research has frequently underlined the importance of international exchange for national policy development, it is yet unclear whether resulting policies are converging. By distinguishing different kinds of education policy goals, we hypothesise that indicators related to macro-level goals are more likely to converge than those related to implementation. We then analyse the development of several education policies since the 1990s. We find strong convergence of some indicators and among some groups of countries, but no clear pattern emerges. Convergence is only partially influenced by the abstractness of education policy goals, and in particular the Scandinavian countries seem to pursue their own approaches in important education policy options. 相似文献
984.
Thomas F. Nelson Laird Amy K. Garver Amanda Suniti Niskodé-Dossett 《Research in higher education》2011,52(3):261-277
Using data from over 9,000 faculty members that participated in the Faculty Survey of Student Engagement (FSSE), this study
examined the moderating role a range of course characteristics played on the effects of gender on the percentage of class
time spent on various activities, a measure of teaching style. Results revealed gender differences, but that the gaps between
men and women in lecturing and active classroom practices varied by disciplinary area, course level, and the number of times
a course had been taught by the same instructor. The results confirm that gender effects depend on context, which implies
that efforts to improve teaching and learning must also adapt to the instructional context. 相似文献
985.
Tara M. Mortensen Brian P. McDermott Khadija Ejaz Daniel D. Haun 《Journalism Practice》2019,13(5):576-591
This study is the first to inquire about the factors that influence people’s willingness to allow professional photojournalists to tell their stories through the medium of the photo essay. Guided by Self-Disclosure Theory, in-depth interviews were conducted with the subjects of 15 peer-judged award-winning photo essays. These were drawn from the multiple picture categories of the National Press Photographers Association (NPPA) Monthly Clip Contest, the annual NPPA Best of Photojournalism Contest, and the annual World Press Photo Contest between 2013 and 2017. The topics of the photo essays were sensitive in nature. Analysis reveals support and appreciation amongst photo-essay subjects for the profession of photojournalism. Motivations derived from the sensitivity and professionalism with which each interviewee was initially approached, a need to tell a different side of the story, a desire to inspire others or invoke change, and the memory-keeping and permanence afforded through published professional photojournalism. 相似文献
986.
The most successful school library media specialists are those who collaborate with teachers as full partners in the instructional
process. Without assertive action by the school library media specialist, however, school administrators and teachers are
likely to be more aware of the media specialist’s administrative role than the roles of teacher, instructional partner, and
information specialist. Reductions to library media staff and finding common planning time are examples of serious challenges,
but these are not insurmountable. In the context of well-planned instructional projects, collaboration with teachers is a
primary way that school library media professionals can demonstrate that their work is a vital part of the academic life of
their schools, and a positive factor in improving student achievement. 相似文献
987.
Grisham W Schottler NA McCauley LM Pham AP Ruiz ML Fong MC Cui X 《CBE life sciences education》2011,10(2):222-230
Zebra finch song behavior is sexually dimorphic: males sing and females do not. The neural system underlying this behavior is sexually dimorphic, and this sex difference is easy to quantify. During development, the zebra finch song system can be altered by steroid hormones, specifically estradiol, which actually masculinizes it. Because of the ease of quantification and experimental manipulation, the zebra finch song system has great potential for use in undergraduate labs. Unfortunately, the underlying costs prohibit use of this system in undergraduate labs. Further, the time required to perform a developmental study renders such undertakings unrealistic within a single academic term. We have overcome these barriers by creating digital tools, including an image library of song nuclei from zebra finch brains. Students using this library replicate and extend a published experiment examining the dose of estradiol required to masculinize the female zebra finch brain. We have used this library for several terms, and students not only obtain significant experimental results but also make gains in understanding content, experimental controls, and inferential statistics (analysis of variance and post hoc tests). We have provided free access to these digital tools at the following website: http://mdcune.psych.ucla.edu/modules/birdsong. 相似文献
988.
Today's doctoral programs continue to prepare students for a traditional academic career path despite the inadequate supply of research-focused faculty positions. We advocate for a broader doctoral curriculum that prepares trainees for a wide range of science-related career paths. In support of this argument, we describe data from our survey of doctoral students in the basic biomedical sciences at University of California, San Francisco (UCSF). Midway through graduate training, UCSF students are already considering a broad range of career options, with one-third intending to pursue a non-research career path. To better support this branching career pipeline, we recommend that national standards for training and mentoring include emphasis on career planning and professional skills development to ensure the success of PhD-level scientists as they contribute to a broadly defined global scientific enterprise. 相似文献
989.
Pascual Marqués-Bruna 《Sports Engineering》2011,13(4):195-204
This study examined aerodynamic properties and boundary layer stability in five cambered airfoils operating at the low Reynolds
numbers encountered in motor racing. Numerical modelling was carried out in the flow regime characterised by Reynolds numbers
0.82–1.29 × 106. The design Reynolds number of 3 × 106 was used as a reference. Aerodynamics variables were computed using AeroFoil 2.2 software, which uses the vortex panel method
and integral boundary layer equations. Validation of AeroFoil 2.2 software showed very good agreement between calculated aerodynamic
coefficients and wind tunnel experimental data. Drag polars, lift/drag ratio, pitching moment coefficient, chordwise distributions
(surface velocity ratio, pressure coefficient and boundary layer thickness), stagnation point, and boundary layer transition
and separation were obtained at angles of attack from −4° to 12°. The NASA NLF(1)-0414F airfoil offers versatility for motor
racing with a wide low-drag bucket, low minimum profile drag, high lift/drag ratio, laminar flow up to 0.7 chord, rapid concave
pressure recovery, high resultant pressure coefficient and stall resistance at low Reynolds numbers. The findings have implications
for the design of race car wings. 相似文献
990.
A number of recent studies have measured the extent and timing of segment rotation during the golf swing. A promising technique,
instantaneous screw axis (ISA) theory, could provide a better expression of segment rotation. In Part 1 of this two-part study,
the objectives are to identify the ISA of the pelvis, shoulders and left arm during the downswing, compute segment angular
velocity relative to that segment’s ISA and verify that ISA theory is a valid tool to analyse segment rotation during the
golf swing. Results indicate that for all subjects, at least 71% of marker velocity is a result of rotation about their respective
ISA, when averaging results over the duration of the downswing, confirming that motion is primarily rotational. Furthermore,
ISA position and orientation of each segment approaches, on average, the expected gross axis of rotation, confirming that
motion about the ISA is representative of joint motion. 相似文献