全文获取类型
收费全文 | 3160篇 |
免费 | 69篇 |
国内免费 | 36篇 |
专业分类
教育 | 2100篇 |
科学研究 | 398篇 |
各国文化 | 45篇 |
体育 | 353篇 |
综合类 | 63篇 |
文化理论 | 30篇 |
信息传播 | 276篇 |
出版年
2023年 | 11篇 |
2022年 | 47篇 |
2021年 | 73篇 |
2020年 | 80篇 |
2019年 | 119篇 |
2018年 | 140篇 |
2017年 | 149篇 |
2016年 | 114篇 |
2015年 | 105篇 |
2014年 | 122篇 |
2013年 | 349篇 |
2012年 | 145篇 |
2011年 | 131篇 |
2010年 | 131篇 |
2009年 | 106篇 |
2008年 | 116篇 |
2007年 | 158篇 |
2006年 | 142篇 |
2005年 | 97篇 |
2004年 | 85篇 |
2003年 | 136篇 |
2002年 | 159篇 |
2001年 | 146篇 |
2000年 | 97篇 |
1999年 | 40篇 |
1998年 | 25篇 |
1997年 | 23篇 |
1996年 | 13篇 |
1995年 | 20篇 |
1994年 | 14篇 |
1993年 | 19篇 |
1992年 | 11篇 |
1991年 | 11篇 |
1990年 | 12篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 9篇 |
1986年 | 4篇 |
1985年 | 12篇 |
1984年 | 8篇 |
1983年 | 6篇 |
1982年 | 6篇 |
1980年 | 5篇 |
1978年 | 7篇 |
1977年 | 4篇 |
1974年 | 4篇 |
1973年 | 5篇 |
1967年 | 4篇 |
1887年 | 3篇 |
1865年 | 4篇 |
排序方式: 共有3265条查询结果,搜索用时 15 毫秒
51.
For the past few years a discussion has been going on about the specific skills and knowledge a complete engineer should possess. Apart form this discussion, a separate debate has focused on the content of an engineer's education. This article is a combination of two joint papers (De Graaff and Ravesteijn 2000, Ravesteijn and De Graaff 2000) bearing on these respective subjects, presented by the authors at the SEFI 2000 conference in Paris. The demands from industry that engineers of the future will have to meet are summarized and related to characteristics of modern training methods. It is argued that a new view on the content of the engineer's education implies, at least to a certain extent, a new set of educational tools. 相似文献
52.
53.
Research in Science Education - The first phase of this multiphase study involves modeling of college students’ thinking of friction at the microscopic level. Diagnostic interviews were... 相似文献
54.
Michael Furlong Leslie Babinski Scott Poland Jessica Muoz Sharon Boles 《Psychology in the schools》1996,33(1):28-37
Recent concern about school violence has increased demands on school psychologists to respond to safety concerns on their school campuses. In this study, 123 school psychologists responded to a survey about their perceptions, experiences, and readiness to meaningfully address school violence. School psychologists reported that they do not worry about their personal safety at school (78%), but most felt unprepared to deal with school violence (73%) and had received no specialized training in this area (85%). A principal components analysis of the types of violence school psychologists perceived to occur on their campuses identified a range of incidents from bullying to antisocial behavior. School psychologists working in inner-city schools were more likely to believe that their schools had high levels of violence (45.6%) compared with those working in urban-not inner-city (14.3%), suburban (4.9%), or rural (0%) schools. Recommendations to prepare school psychologists to help prevent, reduce, and respond to campus violence are discussed. © 1996 John Wiley & Sons, Inc. 相似文献
55.
Mikhail Santos Cerqueira Jose Diego Sales Do Nascimento Daniel Germano Maciel Jean Artur Mendonca Barboza Wouber Herickson De Brito Vieira 《运动与健康科学(英文)》2020,9(2):152-159
Purpose:To investigate whether blood flow restriction(BFR) without concomitant exercise mitigated strength reduction and atrophy of thigh muscles in subjects under immobilization for lower limbs.Methods:The following databases were searched:PubMed,CINAHL,PEDro,Web of Science,Central,and Scopus.Results:The search identified 3 eligible studies,and the total sample in the identified studies consisted of 38 participants.Isokinetic and isometric torque of the knee flexors and extensors was examined in 2 studies.Cross-sectional area of thigh muscles was evaluated in 1 study,and thigh girth was measured in 2 studies.The BFR protocol was 5 sets of 5 min of occlusion and 3 min of free flow,twice daily for approximately 2 weeks.As a whole,the included studies indicate that BFR without exercise is able to minimize strength reduction and muscular atrophy after immobilization.It is crucial to emphasize,however,that the included studies showed a high risk of bias,especially regarding allocation concealment,blinding of outcome assessment,intention-to-treat analyses,and group similarity at baseline.Conclusion:Although potentially useful,the high risk of bias presented by original stodies limits the indication of BFR without concomitant exercise as an effective countermeasure against strength reduction and atrophy mediated by immobilization. 相似文献
56.
57.
58.
劳动力市场分割与大学毕业生失业 总被引:102,自引:5,他引:102
赖德胜 《北京师范大学学报(社会科学版)》2001,(4):69-76
具有大学以上学历者占我国全部劳动者的比例非常低 ,但最近几年大学毕业生找工作却有越来越难的趋势。这种看似矛盾的现象是转型过程中劳动力市场分割这一制度背景下 ,大学毕业生与用人单位相互搜寻的结果。过大的城乡收入差距和过高的工作转换成本 ,使大学毕业生“宁要城里一张床 ,不要农村一幢房”,但城里的用人单位却因过高的解聘成本和户口成本而不能吸收更多的大学毕业生。因此 ,大学毕业生就业难的缓解和解决 ,要依赖经济发展 ,也离不开体制改革 相似文献
59.
60.
剔花是宋代出现的一种陶瓷装饰新工艺,主要用在一些需要使用化妆土的粗胎瓷器上。其工艺一般是先在胎体表面施一至两层白化妆土,趁化妆土未干时用尖锐的工具迅速划出花纹轮廓,紧接着用铲状工具将花纹以外的化妆土剔掉,最后施透明釉入窑焙烧。剔花装饰巧妙地利用白色化妆土与深色胎体之间的反差来突出纹饰,与传统的划花装饰相比,不仅花纹显得更加醒目,而且还具有一定的立体感。 相似文献