全文获取类型
收费全文 | 28412篇 |
免费 | 223篇 |
国内免费 | 16篇 |
专业分类
教育 | 21006篇 |
科学研究 | 2711篇 |
各国文化 | 127篇 |
体育 | 1651篇 |
综合类 | 9篇 |
文化理论 | 489篇 |
信息传播 | 2658篇 |
出版年
2021年 | 152篇 |
2020年 | 254篇 |
2019年 | 376篇 |
2018年 | 2646篇 |
2017年 | 2601篇 |
2016年 | 2047篇 |
2015年 | 425篇 |
2014年 | 523篇 |
2013年 | 3345篇 |
2012年 | 620篇 |
2011年 | 1204篇 |
2010年 | 1178篇 |
2009年 | 728篇 |
2008年 | 1055篇 |
2007年 | 1467篇 |
2006年 | 433篇 |
2005年 | 619篇 |
2004年 | 679篇 |
2003年 | 580篇 |
2002年 | 377篇 |
2001年 | 357篇 |
2000年 | 340篇 |
1999年 | 281篇 |
1998年 | 147篇 |
1997年 | 192篇 |
1996年 | 190篇 |
1995年 | 191篇 |
1994年 | 151篇 |
1993年 | 180篇 |
1992年 | 247篇 |
1991年 | 236篇 |
1990年 | 215篇 |
1989年 | 255篇 |
1988年 | 254篇 |
1987年 | 223篇 |
1986年 | 215篇 |
1985年 | 236篇 |
1984年 | 200篇 |
1983年 | 239篇 |
1982年 | 185篇 |
1981年 | 167篇 |
1980年 | 166篇 |
1979年 | 241篇 |
1978年 | 192篇 |
1977年 | 169篇 |
1976年 | 153篇 |
1975年 | 134篇 |
1974年 | 122篇 |
1973年 | 131篇 |
1971年 | 110篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
181.
182.
Benjamin D. Branch 《College & Undergraduate Libraries》2014,21(1):109-114
The role of the library is to assist citizens in skills development critical to national interest and empowerment as literacy ambassadors, in general. Specifically, the work by the Federal Geographic Data Committee (1994) indicates that spatial literacy is for every citizen and not just a set of workforce specialists. Hence, the use of maps in decision making and problem solving will become fundamental to all professions, including library professionals. Thus, a spatial literacy awareness and rationale for such as standard job ability is discussed as a future librarian workforce proficiency and knowledge transfer medium. 相似文献
183.
Jin Woo Lee Anastasia Ostrowski Aileen Huang-Saad Colleen M. Seifert 《European Journal of Engineering Education》2019,44(3):360-378
ABSTRACTWith increasing demand for improved medical equipment and healthcare, next-generation biomedical engineers need strong design skills. Equipping biomedical engineering students with tools for idea generation and development can increase student design success. Design Heuristics are an ideation tool developed through empirical studies of product designs. While identified in the mechanical engineering space, Design Heuristics may be applicable in biomedical engineering design. In our study, we implemented a Design Heuristics session during upper-level undergraduate and first-year graduate biomedical engineering design courses. We examined the applicability of Design Heuristics within individual and team concept generation contexts. The findings demonstrated that biomedical engineering students were able to use Design Heuristics to generate multiple concepts, and that initial concepts produced using Design Heuristics were carried over into final team design. The results support the applicability of Design Heuristics to student idea generation in biomedical engineering design. 相似文献
184.
李哲贤 《临沂师范学院学报》2015,37(1):45-49
在先秦时期,除了名家和墨家之外,在名学研究方面,其成就最大的当属荀子。荀子对于先秦名学之贡献主要是进一步批判和发展名家和墨辩之名学,使儒家之名学更加严谨。然而,历来有关荀子之研究多着眼于其心、性、天、礼等之探讨,而疏于抉发其名学之义蕴。直到近年来,由于大陆学界积极挖掘中国古代之逻辑思想,以免西方逻辑专美于前,于是有关中国逻辑史或逻辑思想之论着,如雨后春笋般出现。此等有关中国逻辑论者之研究对象主要为先秦时期讨论名实辩说之篇章,尤其是公孙龙、墨辩和荀子名学之研究。此外,由于一些国外学者之参与,使得中国古代逻辑之研究,尤其是关于荀子名学之研究,如今已成一较为普遍之现象。有关荀子之研究,日本汉学界已作出极为可喜之成绩。唯历来有关荀子之研究,日本汉学界多着重其心、性、天、礼或政治、伦理学说之阐述,而较疏于其名学之研究。然而,就目前已发表之论着而言,无论是在厘清荀子之哲学立场或对于名学之分析等,亦颇有其独到之处,值得吾人借镜。 相似文献
185.
School psychologists are tasked with ensuring treatment integrity because the level of intervention implementation affects decisions about student progress. Treatment integrity includes multiple dimensions that may impact the effectiveness of an intervention including adherence, dosage, quality, and engagement. Unfortunately, treatment integrity is not routinely monitored in consultation. A systematic framework is needed to better prepare practitioners to assess, analyze, and intervene when there are treatment integrity failures. A framework for monitoring and improving multiple dimensions of treatment integrity in natural settings is proposed to provide guidance to practitioners through two phases. The first phase focuses on improving initial treatment integrity and the second phase outlines a problem‐solving process for improving treatment integrity. 相似文献
186.
187.
The N1 effect is an electrophysiological marker of visual specialization for print. The phonological mapping hypothesis (Maurer & McCandliss, 2007) posits that the left-lateralized effect reflects grapheme-phoneme integration. In this event-related potential study, first (age = 7.06 years, N = 32) and third-grade readers (age = 9.29 years, N = 28) were presented with pairs of pseudowords and Armenian character strings in a novel implicit same-different paradigm. To test the phonological mapping hypothesis, stimuli were presented in visual-only and audiovisual conditions. The results demonstrated that tuning for print already emerges in first grade. Moreover, the parallel presentation of auditory stimuli enhanced the N1 effect suggesting a role of orthographic-phonological mapping in the development of specialization for print. 相似文献
188.
Donghui Zhang 《Frontiers of Education in China》2018,13(3):448-450
189.
Alan M. Nevill Yassine Negra Tony D. Myers Senda Sammoud Helmi Chaabene 《Journal of sports sciences》2020,38(7):787-794
ABSTRACTThis study identified key somatic and demographic characteristics that benefit all swimmers and, at the same time, identified further characteristics that benefit only specific swimming strokes. Three hundred sixty-three competitive-level swimmers (male [n = 202]; female [n = 161]) participated in the study. We adopted a multiplicative, allometric regression model to identify the key characteristics associated with 100 m swimming speeds (controlling for age). The model was refined using backward elimination. Characteristics that benefited some but not all strokes were identified by introducing stroke-by-predictor variable interactions. The regression analysis revealed 7 “common” characteristics that benefited all swimmers suggesting that all swimmers benefit from having less body fat, broad shoulders and hips, a greater arm span (but shorter lower arms) and greater forearm girths with smaller relaxed arm girths. The 4 stroke-specific characteristics reveal that backstroke swimmers benefit from longer backs, a finding that can be likened to boats with longer hulls also travel faster through the water. Other stroke-by-predictor variable interactions (taken together) identified that butterfly swimmers are characterized by greater muscularity in the lower legs. These results highlight the importance of considering somatic and demographic characteristics of young swimmers for talent identification purposes (i.e., to ensure that swimmers realize their most appropriate strokes). 相似文献
190.