全文获取类型
收费全文 | 14251篇 |
免费 | 104篇 |
国内免费 | 7篇 |
专业分类
教育 | 10388篇 |
科学研究 | 1224篇 |
各国文化 | 80篇 |
体育 | 1113篇 |
综合类 | 7篇 |
文化理论 | 86篇 |
信息传播 | 1464篇 |
出版年
2023年 | 108篇 |
2021年 | 116篇 |
2020年 | 175篇 |
2019年 | 263篇 |
2018年 | 350篇 |
2017年 | 359篇 |
2016年 | 329篇 |
2015年 | 205篇 |
2014年 | 279篇 |
2013年 | 2580篇 |
2012年 | 297篇 |
2011年 | 361篇 |
2010年 | 223篇 |
2009年 | 216篇 |
2008年 | 322篇 |
2007年 | 231篇 |
2006年 | 301篇 |
2005年 | 198篇 |
2004年 | 183篇 |
2003年 | 174篇 |
2002年 | 213篇 |
2001年 | 319篇 |
2000年 | 287篇 |
1999年 | 259篇 |
1998年 | 128篇 |
1997年 | 156篇 |
1996年 | 171篇 |
1995年 | 175篇 |
1994年 | 139篇 |
1993年 | 161篇 |
1992年 | 234篇 |
1991年 | 209篇 |
1990年 | 207篇 |
1989年 | 242篇 |
1988年 | 244篇 |
1987年 | 205篇 |
1986年 | 204篇 |
1985年 | 216篇 |
1984年 | 189篇 |
1983年 | 229篇 |
1982年 | 170篇 |
1981年 | 159篇 |
1980年 | 156篇 |
1979年 | 229篇 |
1978年 | 181篇 |
1977年 | 164篇 |
1976年 | 149篇 |
1975年 | 128篇 |
1974年 | 119篇 |
1973年 | 125篇 |
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
91.
92.
D P Sen Gupta 《Resonance》2007,12(3):54-69
Alternating Current (AC) is used all over the world today. In India we use AC at 50 Hz (cycles per second) and in USA and Canada at 60 Hz. During the latter part of the 19th century, even during the early part of the 20th century, Direct Current or DC was widely used. Had we continued with DC, electricity would not have been as widely available as it is today and its use would have been cumbersome, costly and severely restricted. We owe it mainly to the Serbian genius Nikola Tesla that electricity has reached almost every nook and corner of most continents. 相似文献
93.
How do children conceptualise their own development? From their point of view, what serve as constraints for their movements in time and space? The theoretical framework of the experiment described here was a cultural historical first person developmental perspective. The concept of transition is here put in use to capture the children’s experience of their movements with or against a dynamic, inviting and demanding socio-cultural landscape over time. An interpretation of children’s experience of their developmental timing with temporalities of the childhood landscape is presented. 相似文献
94.
Jean B. Schumaker Joseph B. Fisher Lisa D. Walsh Paula E. Lancaster 《Learning disabilities research & practice》2020,35(4):180-200
In each of two studies, teachers were randomly assigned to either a Virtual Workshop (VW) group that used a computerized professional development program or an Actual Workshop (AW) group that participated in face-to-face professional development, including discussion, feedback, and collaboration. In both studies, teachers’ posttest scores related to their knowledge of the Question Exploration Routine and their plans for using it were significantly higher than their pretest scores. In Study 2, both groups’ posttest scores with regard to implementation and planning of the routine were significantly greater than their pretest scores. There were no significant differences between the groups at posttesting on any measure. The posttest knowledge scores of the whole groups of students and the subgroups of students with LD being taught by both groups of teachers were significantly higher than their pretest scores. All teachers indicated that they were satisfied with the training and the routine. VW teachers in both studies indicated that they were satisfied with the software program. 相似文献
95.
96.
97.
98.
This paper reports on the use of the Course Experience Questionnaire (CEQ) as an instrument to monitor the medical programme at the University of Sydney and in particular to measure improvements in teaching quality with the introduction of the new graduate-entry problem-based programme. In addition, it raises the more general issue of interpretation of CEQ results in courses designed around problembased learning (PBL). Students' perceptions of teaching quality were sought using a whole class questionnaire survey and small group interviews. Students in the new programme rated their course more highly than did students in the old programme with respect to good teaching, appropriate assessment, generic skills and overall satisfaction. These improvements did not hold with respect to the clarity of goals and standards, nor for perceptions of an appropriate workload. The results are interpreted in context and it is argued that particular items in the CEQ do not reflect the educational philosophy or the instructional processes of PBL programmes. 相似文献
99.
Blaze M. Bowers J.D. 《Disability Compliance for Higher Education》2023,28(11):6-7
Countless pregnant and parenting students come to college and university campuses across the country every year. According to the Urban Institute, over 5.4 million parenting students were pursuing higher education as of December 2022. Whether a first-time freshman or a doctoral-level graduate student, these students are owed a robust support system by universities and colleges striving to achieve inclusive, developmental, and academic excellence. 相似文献
100.
OBJECTIVE: The aim of this study was to examine the impact of childhood sexual abuse (CSA) on clinical characteristics and premature termination of treatment in anorexia nervosa (AN). METHOD: The participants were 77 consecutive patients with AN admitted to an inpatient eating disorders unit. The patients were assessed in terms of eating disorder symptoms, general psychopathology, and CSA history at admission to hospital. RESULTS: Thirty-seven patients (48%) reported a history of CSA before the onset of the eating disorder. Individuals with a history of CSA reported significantly greater psychiatric comorbidity, including higher levels of depression and anxiety, lower self-esteem, more interpersonal problems, and more severe obsessive-compulsive symptoms. Patients with the binge-purge subtype of AN (AN-BP) were significantly more likely to report a history of CSA prior to the onset of the eating disorder as compared with patients with the restricting subtype (AN-R) of the illness (65% of the AN-BP patients vs. 37% of the AN-R patients; p<.02). Contrary to our predictions, abused patients were not significantly more likely to dropout of treatment overall. However, patients of the binge-purge subtype (AN-BP) with a history of CSA were significantly more likely to terminate treatment prematurely as compared with the other patients. CONCLUSIONS: Consistent with previous findings, the present results indicate that the prevalence of CSA is high among individuals seeking inpatient treatment for AN. A history of CSA was associated with greater psychiatric disturbance overall and a higher rate of dropout for patients of the binge-purge subtype. 相似文献