全文获取类型
收费全文 | 16985篇 |
免费 | 226篇 |
国内免费 | 55篇 |
专业分类
教育 | 12491篇 |
科学研究 | 1239篇 |
各国文化 | 172篇 |
体育 | 1234篇 |
综合类 | 48篇 |
文化理论 | 79篇 |
信息传播 | 2003篇 |
出版年
2021年 | 182篇 |
2020年 | 234篇 |
2019年 | 356篇 |
2018年 | 508篇 |
2017年 | 533篇 |
2016年 | 494篇 |
2015年 | 324篇 |
2014年 | 463篇 |
2013年 | 3384篇 |
2012年 | 457篇 |
2011年 | 477篇 |
2010年 | 410篇 |
2009年 | 403篇 |
2008年 | 422篇 |
2007年 | 397篇 |
2006年 | 415篇 |
2005年 | 365篇 |
2004年 | 257篇 |
2003年 | 254篇 |
2002年 | 232篇 |
2001年 | 378篇 |
2000年 | 287篇 |
1999年 | 254篇 |
1998年 | 167篇 |
1997年 | 159篇 |
1996年 | 168篇 |
1995年 | 144篇 |
1994年 | 155篇 |
1993年 | 135篇 |
1992年 | 216篇 |
1991年 | 208篇 |
1990年 | 240篇 |
1989年 | 220篇 |
1988年 | 178篇 |
1987年 | 184篇 |
1986年 | 190篇 |
1985年 | 176篇 |
1984年 | 182篇 |
1983年 | 169篇 |
1982年 | 136篇 |
1981年 | 138篇 |
1980年 | 141篇 |
1979年 | 195篇 |
1978年 | 165篇 |
1977年 | 119篇 |
1976年 | 125篇 |
1975年 | 114篇 |
1974年 | 101篇 |
1973年 | 106篇 |
1971年 | 118篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
Objective. This study investigated how parents’ perceptions of, feelings toward, and anticipated responses to children’s emotions relate to parents’ meta-emotion philosophy and attachment. Design. Parents (112 mothers and 95 fathers) completed an online research study where they viewed photographs of unfamiliar girls and boys (aged 10–14 years) displaying varying intensities of happiness, sadness, fear, anger, and neutral expressions. Parents labeled the emotion, identified the emotion’s intensity, and reported their mirrored emotion and responses. They also completed measures assessing their meta-emotion philosophy and attachment. Results. Meta-emotion philosophy predicted parents’ responses to children’s negative emotion, in that greater emotion-coaching predicted greater accuracy in labeling emotions (boys only), a greater likelihood to interact with children, and for mothers to be further from the mean in either direction in their mirrored emotion. Attachment also predicted parents’ responses to children’s negative emotions: Parents higher in anxiety reported more mirrored emotion, and those higher in avoidance reported less mirrored emotion, lower intensity, and less willingness to interact (boys only). In exploratory models for positive emotion, parents’ meta-emotion philosophy did not predict their responses, but parents higher in attachment avoidance rated girls’ positive emotions as less intense, reported less mirrored emotion, less willingness to interact, and less supportive responses, and those higher in anxiety showed the opposite pattern. Conclusion. Despite methodological limitations, results offer new evidence that parents’ ratings on a standardized emotion perception task as well as their anticipated responses toward children’s emotion displays are predicted by individual differences in their attachment and meta-emotion philosophy. 相似文献
992.
This article reports on findings from a year-long research project conducted during the 2012–2013 school year in a PK–12 school district, located in the Mountain West region of the United States, utilizing the Photovoice method. The findings in the project point to the important critical counter-narratives Spanish-speaking immigrant parents present to the larger school community when given the opportunity to have their voices and perspectives heard and recorded in written form. The article provides teachers, counselors, administrators, and support staff in schools and school districts with insight into the hopes and aspirations of Spanish-speaking immigrant parents and highlights educational practices that address issues of equity and access, as seen through the eyes of the participants in the study. 相似文献
993.
University Counseling Centers (UCCs) experience high clinical demands and severe client presentations leaving counselors with limited time and resources to evaluate delivery of services. In this article, we present clinician-friendly quality improvement (QI) strategies used at a large Midwestern university and provide recommendations for implementing QI programs at other UCCs even as their resources may vary. With counselor-led efforts examining and evaluating services, UCCs can use QI programs to inform and improve counseling practices as well as advise university administrators about the positive outcomes of the center’s work. 相似文献
994.
995.
Karim-Aly S. Kassam Leanne M. Avery Morgan L. Ruelle 《Cultural Studies of Science Education》2017,12(1):97-118
Using two case studies of children’s knowledge, this paper sheds light on the value, diversity, and necessity of Indigenous and place-based knowledge to science and engineering curricula in rural areas. Rural contexts are rich environments for cultivating contextual knowledge, hence framing a critical pedagogy of teaching and learning. Indigenous and rural place-based knowledge are nuanced and pragmatic in character, and offer solutions to both local and global challenges. Two case studies, drawn from the experience of Lakota and Dakota communities and rural New York State, demonstrate the need to conserve, transmit, and contribute to Indigenous and rural knowledge through experiential and place-based education that bridges the gap between children’s knowledge and global STEM. This knowledge is inherently diverse in its complexity and connectivity to habitat, and when viewed in this light, has the capacity to transform our perspectives on educational practices and policies as well as our overall outlook on conserving both ecological as well as cultural diversity worldwide. Because diversity and knowledge are necessary for the survival of life on this planet, an enriched concept of pedagogical pluralism, in terms of multiple ways of knowing, is a necessity. 相似文献
996.
S. K. Bansal H. N. Pandey A. Bansal L. D. Joshi 《Indian journal of clinical biochemistry : IJCB》1992,7(2):179-184
Circadian rhythm of serum glucose, pyruvate, lactate and lactate dehydrogenase (LDH) was studied in normal healthy young volunteers
at the onset (I Group, 7 cases) and peak (II Group, 8 cases) of winters in India with highly varied temperature. There was
a significant difference, in the circadian rhythm of glucose, pyruvate and lactate dehydrogenase (LDH) of the two groups.
A clockwise shift was observed in acrophase except in serum lactate, which is related to the energy demand in association
with time qualified changes in diurnal activity of the individuals and change in photoperiod. 相似文献
997.
This paper is devoted to the identification of analytic signals and to find a solution to the following problem. Given a realization of an analytic signal, it is necessary to find the analytic function by which the signal is described. The proposed approach to this problem is based on relatively simple relationships existing between many analytic signals and their respective derivatives. These relationships are closely related to the properties of the dynamic systems which generate the signals under investigation. Simple identification procedures are described and tested by means of computer simulation. 相似文献
998.
Environment and Policy Factors Shaping Global E-Commerce Diffusion: A Cross-Country Comparison 总被引:1,自引:0,他引:1
This article examines the key global, environmental and policy factors that act as determinants of e-commerce diffusion. It is based on systematic comparison of case studies from 10 countries--Brazil, China, Denmark, France, Germany, Mexico, Japan, Singapore, Taiwan, and the United States. It finds that B2B e-commerce seems to be driven by global forces, whereas B2C seems to be more of a local phenomenon. A preliminary explanation for this difference is that B2B is driven by global competition and MNCs that "push" e-commerce to their global suppliers, customers, and subsidiaries. This in turn creates pressures on local companies to adopt e-commerce to stay competitive. In contrast, B2C is "pulled" by consumer markets, which are mainly local and therefore divergent. While all consumers desire convenience and low prices, consumer preferences and values, national culture, and distribution systems differ markedly across countries and define differences in local consumer markets. These findings support the transformation perspective about globalization and its impacts. In terms of policy, the case studies suggest that enabling policies such as trade and telecommunications liberalization are likely to have the biggest impact on e-commerce, by making ICT and Internet access more affordable to firms and consumers, and increasing pressure on firms to adopt e-commerce to compete. Specific e-commerce legislation appears not to have as big an impact, although inadequate protection for both buyers and sellers in some countries suggests that mechanisms need to be developed to ensure greater confidence in doing business online. 相似文献
999.
The transport of thermal energy in thermodynamics is described as the product of entropy flow and of the absolute temperature, in analogy to the volume flow and pressure in oil hydraulics and to electric charge flow (= current) and voltage in electronics. Bond graphs are shown to be especially suitable to describe the splitting of applied thermal energy into internal energy and external mechanical work. Transformers and the 0- and 1-junctions of Paynter can illustrate various entropy flow processes, including Carnot engines and heat exchangers. Entropy flow in heat conduction is distinguished from entropy convection, or transport by moving mass, where the entropy/temperature characteristic or equation of state is important. Irreversibilities are represented by impedance transformers reducing temperature and increasing entropy flow but conserving power. 相似文献
1000.