全文获取类型
收费全文 | 3856篇 |
免费 | 85篇 |
国内免费 | 68篇 |
专业分类
教育 | 2352篇 |
科学研究 | 479篇 |
各国文化 | 20篇 |
体育 | 470篇 |
综合类 | 216篇 |
文化理论 | 20篇 |
信息传播 | 452篇 |
出版年
2023年 | 11篇 |
2022年 | 38篇 |
2021年 | 85篇 |
2020年 | 79篇 |
2019年 | 98篇 |
2018年 | 92篇 |
2017年 | 93篇 |
2016年 | 85篇 |
2015年 | 139篇 |
2014年 | 195篇 |
2013年 | 518篇 |
2012年 | 230篇 |
2011年 | 246篇 |
2010年 | 232篇 |
2009年 | 238篇 |
2008年 | 211篇 |
2007年 | 212篇 |
2006年 | 212篇 |
2005年 | 161篇 |
2004年 | 131篇 |
2003年 | 84篇 |
2002年 | 106篇 |
2001年 | 80篇 |
2000年 | 65篇 |
1999年 | 37篇 |
1998年 | 23篇 |
1997年 | 39篇 |
1996年 | 33篇 |
1995年 | 28篇 |
1994年 | 25篇 |
1993年 | 17篇 |
1992年 | 14篇 |
1991年 | 15篇 |
1990年 | 14篇 |
1989年 | 9篇 |
1988年 | 10篇 |
1987年 | 10篇 |
1986年 | 6篇 |
1985年 | 7篇 |
1984年 | 5篇 |
1983年 | 10篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 13篇 |
1976年 | 6篇 |
1975年 | 4篇 |
1970年 | 3篇 |
排序方式: 共有4009条查询结果,搜索用时 15 毫秒
91.
实践环节教学作为高等学校工科类专业培养计划的一个有机组成部分,是培养工科学生技能与技巧的重要环节。阐述工科类专业实践教学的重要性,分析实践教学中存在的困难与问题,提出提高实践环节教学质量的方法与对策,以期对高等学校实践教学的改革进行探索。 相似文献
92.
<宪章录>是明代薛应旂编纂的一部记载本朝历史的编年体史书,史料价值颇高.该书通过原文照录、剪裁融合等方法,广泛征引<实录>、<宝训>、野史笔记及口碑史料等各类文献,在史料上表现出博洽、珍贵、慎核等重要特征. 相似文献
93.
94.
金秋时节,金庸偕夫人查林乐怡出现在浙江海宁金庸小说国际学术研讨会上,这是金庸自1992年以来第五次回故乡。他的故乡情,他的求学记, 相似文献
95.
In the present study, we examined the performance environment of the England youth soccer teams. Using a semi-structured protocol with a prospective sample, national coaches (n = 6), sport scientists (n = 3), and players (n = 4) were interviewed directly following international tournaments about the factors that positively and negatively influenced performance. Qualitative content analysis revealed the following factors as major positive influences on performance: adhering to a consistent tournament strategy, player understanding, strong team cohesion, organized entertainment activities, detailed knowledge of opposition, an effective physical rest/recovery strategy, and previous tournament experience. Major factors perceived to have negatively influenced performance included: over-coaching, player boredom, player anxiety, physical superiority of the opposition, physical fatigue over the tournament, problems sleeping, and lack of information on the opposition. Eight overall dimensions emerged to describe the performance environment: planning and organization, physical environment, tactical factors, development and performance philosophy, psychological factors, physical factors, social factors, and coaching. The findings support recent work that suggests the performance environment is multifaceted, with performance being contingent upon a broad range of interacting factors that go beyond the traditional psychosocial and physical domains. 相似文献
96.
Moir G Sanders R Button C Glaister M 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(3):285-300
The purpose of this study was to assess the effect of periodized resistance training on accelerative sprint performance. Sixteen physically active men participated in a randomized controlled study. An experimental group (n = 10) completed an 8-week periodized resistance training intervention, while a control group (n = 6) did not train. Pre- and post-training measures of 20-m straight-line sprint time, including a 10-m split, maximum strength, and explosive strength, were recorded. Flight time, stance time, stride length, and stride frequency were quantified from digitized video recordings of the first three strides of the 20-m sprint. Resistance training resulted in significant increases in maximum strength (parallel back squat: 19%) and explosive strength (6-10%). However, both groups increased 0-10 m sprint times (experimental group = 6%; control group = 3%) while 10-20m times were reduced (experimental group = 7%; control group = 4%), highlighting the mechanical differences between the distinct sprint phases. The change during the 0-10m interval was accompanied by a reduction in stride frequency during the first three strides. Strength coaches should be aware that the potential benefits of increased muscular strength during short sprints are likely to be affected by mechanical specificity and that improvements in sprinting performance may not occur immediately after a period of resistance training. 相似文献
97.
在国际热核聚变试验堆计划中,流道插件是包层模块中的一个重要部件,它的主要作用是隔热和电绝缘,它的力学行为受到高温、磁场、流体压力的共同作用,使得其响应分析成为一个多场耦合的问题。本文采用有限体积法和有限元法,对包层中流体传热性能和流道插件的结构安全性能进行计算,其中详细分析一种典型工况下流道插件的应力状态;同时,对具有不同热导率的流道插件进行计算,得出其对包层结构的影响。计算结果说明流道插件厚度方向以及面内方向的压应力均比较安全,而较危险的则为极向面内拉应力和棱边的剪切破坏。采用具有较低热导率的流道插件时,可以使出口金属流体的平均温度提高,从而提高热效率,同时降低第一壁的最高温度,从而保证其结构安全,但流道插件内部的温度梯度会增加,结构热应力也更高。 相似文献
98.
99.
Vonda O. Long 《Psychology in the schools》1982,19(2):250-254
Research has shown that both historically and currently there has been sex-differentiated staffing in American public schools, with a disproportionate number of female teachers at the elementary level. Concern long has been expressed regarding the impact this might have on the sex-role development of American children and the perpetuation of stereotypic staffing patterns. This article supports the hypothesis that psychologically androgynous individuals might be more likely than masculine or feminine individuals to base teaching level choice upon individual preference without regard for its stereotype as more appropriate for one sex than the other. Data collected from preservice teachers at Washington State University support this hypothesis. It was found that while feminine females were more apt to choose the elementary teaching level, masculine males were more apt to choose secondary teaching. In comparison, androgynous preservice teachers of both sexes were as likely to choose the elementary as secondary teaching level. 相似文献
100.
建立基于劳动互换的居家养老服务体系的可行性探究 总被引:1,自引:0,他引:1
老龄社会是21世纪我国的重要国情并对社会保障体系提供完善保障功能提出了日益迫切的需求.然而,在未来相当长时期内我国社会保障体系难以独撑社会稳定发展所赋予的重任.建立基于劳动互换的为老服务体系,合理设计制度,将可以有效调动其他社会资源来弥补现行社会保障体系的不足,并使之发展成为社会保障体系的重要辅助力量,是集可行性、经济性、有效性于一身的最佳选择. 相似文献