首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   20095篇
  免费   216篇
  国内免费   29篇
教育   13183篇
科学研究   3090篇
各国文化   181篇
体育   1772篇
综合类   12篇
文化理论   172篇
信息传播   1930篇
  2021年   173篇
  2020年   270篇
  2019年   410篇
  2018年   543篇
  2017年   527篇
  2016年   448篇
  2015年   306篇
  2014年   424篇
  2013年   3748篇
  2012年   423篇
  2011年   414篇
  2010年   356篇
  2009年   324篇
  2008年   348篇
  2007年   382篇
  2006年   319篇
  2005年   290篇
  2004年   280篇
  2003年   306篇
  2002年   275篇
  2001年   319篇
  2000年   335篇
  1999年   310篇
  1998年   160篇
  1997年   175篇
  1996年   222篇
  1995年   166篇
  1994年   202篇
  1993年   184篇
  1992年   285篇
  1991年   278篇
  1990年   267篇
  1989年   273篇
  1988年   216篇
  1987年   209篇
  1986年   269篇
  1985年   262篇
  1984年   225篇
  1983年   237篇
  1982年   206篇
  1981年   184篇
  1980年   166篇
  1979年   260篇
  1978年   204篇
  1977年   179篇
  1976年   178篇
  1975年   142篇
  1974年   172篇
  1972年   136篇
  1971年   143篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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.
3.
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 (= ?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   
4.
The value that willed body donors provide to medical education is priceless. Their precious gift helps to teach anatomy, spatial relationships between morphological structures, anatomical variation, and professionalism to medical students in a way that plastic models, podcasts, and lectures cannot. They are also an important resource for medical research and a wide variety of postgraduate training opportunities. While many body donation programs throughout the world are nonprofit organizations, there are body donation companies in the United States that sell donors for-profit. These “body brokers” have accumulated large profits from this business. It is incongruous that others would profit from such a priceless, freely donated gift. To prevent this incongruity, it is proposed that the international anatomical community develop a normative culture (a bioethos) for body donation programs. This would involve the conscious and systematic development of ethical principles for the day-to-day policies and practices of institutions that collect and use human bodies. With the development of this bioethos, a cultural shift in how donors are treated would occur and, over time, this would become the normal practice. These principles would become fundamental and foundational for the procurement and use of priceless human tissues.  相似文献   
5.
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   
6.
7.
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号