全文获取类型
收费全文 | 12815篇 |
免费 | 167篇 |
国内免费 | 20篇 |
专业分类
教育 | 8857篇 |
科学研究 | 1282篇 |
各国文化 | 158篇 |
体育 | 1331篇 |
综合类 | 7篇 |
文化理论 | 134篇 |
信息传播 | 1233篇 |
出版年
2021年 | 108篇 |
2020年 | 190篇 |
2019年 | 286篇 |
2018年 | 368篇 |
2017年 | 407篇 |
2016年 | 346篇 |
2015年 | 248篇 |
2014年 | 336篇 |
2013年 | 2579篇 |
2012年 | 311篇 |
2011年 | 296篇 |
2010年 | 252篇 |
2009年 | 251篇 |
2008年 | 287篇 |
2007年 | 300篇 |
2006年 | 262篇 |
2005年 | 244篇 |
2004年 | 228篇 |
2003年 | 242篇 |
2002年 | 216篇 |
2001年 | 207篇 |
2000年 | 222篇 |
1999年 | 217篇 |
1998年 | 116篇 |
1997年 | 117篇 |
1996年 | 159篇 |
1995年 | 118篇 |
1994年 | 140篇 |
1993年 | 112篇 |
1992年 | 196篇 |
1991年 | 173篇 |
1990年 | 176篇 |
1989年 | 162篇 |
1988年 | 129篇 |
1987年 | 129篇 |
1986年 | 150篇 |
1985年 | 141篇 |
1984年 | 120篇 |
1983年 | 137篇 |
1982年 | 123篇 |
1981年 | 122篇 |
1980年 | 100篇 |
1979年 | 164篇 |
1978年 | 124篇 |
1977年 | 103篇 |
1976年 | 113篇 |
1975年 | 80篇 |
1974年 | 105篇 |
1972年 | 74篇 |
1971年 | 74篇 |
排序方式: 共有10000条查询结果,搜索用时 515 毫秒
1.
Interiano-Shiverdecker Claudia G. Kondili Elvita Bazzi Reyma 《International journal for the advancement of counseling》2022,44(2):263-282
International Journal for the Advancement of Counselling - The goal of this study was to examine how individual, community, and socio-political mechanisms of discrimination intersect, manifest, and... 相似文献
2.
Fernandez Frank Baker David P. Fu Yuan-Chih Muñoz Ismael G. Ford Karly Sarita 《Minerva》2021,59(1):79-98
Minerva - Over the course of the 20th century, unprecedented growth in scientific discovery was fueled by broad growth in the number of university-based scientists. During this period the American... 相似文献
3.
Research in Higher Education - Increasingly, undergraduates take more than 4 years to complete a baccalaureate, a situation widely perceived as a waste of time and money, for students,... 相似文献
4.
5.
ABSTRACT Full three-dimensional movements and external moments in golfers’ knees and the possible involvement in injuries have not been evaluated using motion capture at high sample frequencies. This study measured joint angles and external moments around the three anatomical axes in both knees of 10 professional golfers performing golf drives whilst standing on two force plates in a motion capture laboratory. Significant differences were found in the knee joint moments between the lead and trail limbs for the peak values and throughout all stages during the swing phase. A significantly higher net abduction moment impulse was seen in the trail limb compared with the lead limb (?0.518 vs. ?0.135 Nms.kg?1), indicating greater loading over the whole swing, which could contribute to knee lateral compartment or anterior cruciate ligament injuries. A significant correlation (r = ?0.85) between clubhead speed at ball contact and maximum joint moment was found, with the largest correlations being found for joint moments at the top of the backswing event and at the end of the follow-through. Therefore, although knee moments can contribute to high clubhead speeds, the large moments and impulses suggest that they may also contribute to chronic knee injuries or exacerbate existing conditions. 相似文献
6.
7.
In the IR field it is clear that the value of a system depends on the cost and benefit profiles of its users. It would seem obvious that different users would prefer different systems. In the TREC-9 filtering track, systems are evaluated by a utility measure specifying a given cost and benefit. However, in the study of decision systems it is known that, in some cases, one system may be unconditionally better than another. In this paper we employ a decision theoretic approach to find conditions under which an Information Filtering (IF) system is unconditionally superior to another for all users regardless of their cost and benefit profiles.It is well known that if two IF systems have equal precision the system with better recall will be preferred by all users. Similarly, with equal recall, better precision is universally preferred. We confirm these known results and discover an unexpected dominance relation in which a system with lower recall will be universally preferred provided its precision is sufficiently higher. 相似文献
8.
G. Gage Kingsbury 《Educational Measurement》1990,9(2):3-6
What is the rationale for adapting an existing testing system instead of developing your own? What are the limitations of MicroCAT? What has to be modified in order to meet local needs and to realize the potential of adaptive testing in the context of an existing testing system? 相似文献
9.
10.
Paul Morris 《比较教育学》1996,32(1):95-110
The economic success of some of the countries within the East Asian region has generated a range of studies which have attempted to identify the sources of that growth. One strand within these analyses has focused on the critical role of schooling in the accumulation of human capital. This paper examines the role which education has played in the rapid development of the four 'Asian Tigers'; namely: Hong Kong, Taiwan, South Korea and Singapore. It is argued that whilst patterns of educational provision displayed some common features there were also significant differences in other areas such as the role of the state, sources of educational funding, the role of technical education and of the school curriculum. 相似文献