全文获取类型
收费全文 | 4947篇 |
免费 | 78篇 |
国内免费 | 20篇 |
专业分类
教育 | 3342篇 |
科学研究 | 634篇 |
各国文化 | 29篇 |
体育 | 381篇 |
综合类 | 6篇 |
文化理论 | 34篇 |
信息传播 | 619篇 |
出版年
2022年 | 37篇 |
2021年 | 45篇 |
2020年 | 86篇 |
2019年 | 121篇 |
2018年 | 154篇 |
2017年 | 192篇 |
2016年 | 155篇 |
2015年 | 116篇 |
2014年 | 158篇 |
2013年 | 781篇 |
2012年 | 131篇 |
2011年 | 138篇 |
2010年 | 121篇 |
2009年 | 102篇 |
2008年 | 114篇 |
2007年 | 134篇 |
2006年 | 103篇 |
2005年 | 72篇 |
2004年 | 86篇 |
2003年 | 80篇 |
2002年 | 62篇 |
2001年 | 104篇 |
2000年 | 130篇 |
1999年 | 89篇 |
1998年 | 72篇 |
1997年 | 63篇 |
1996年 | 62篇 |
1995年 | 42篇 |
1994年 | 45篇 |
1993年 | 33篇 |
1992年 | 75篇 |
1991年 | 68篇 |
1990年 | 60篇 |
1989年 | 62篇 |
1988年 | 74篇 |
1987年 | 58篇 |
1986年 | 78篇 |
1985年 | 70篇 |
1984年 | 55篇 |
1983年 | 69篇 |
1982年 | 53篇 |
1981年 | 40篇 |
1980年 | 29篇 |
1979年 | 52篇 |
1978年 | 49篇 |
1977年 | 37篇 |
1976年 | 41篇 |
1975年 | 31篇 |
1974年 | 33篇 |
1973年 | 33篇 |
排序方式: 共有5045条查询结果,搜索用时 15 毫秒
891.
Dina N. Kovarik Davis G. Patterson Carolyn Cohen Elizabeth A. Sanders Karen A. Peterson Sandra G. Porter Jeanne Ting Chowning 《CBE life sciences education》2013,12(3):441-459
We investigated the effects of our Bio-ITEST teacher professional development model and bioinformatics curricula on cognitive traits (awareness, engagement, self-efficacy, and relevance) in high school teachers and students that are known to accompany a developing interest in science, technology, engineering, and mathematics (STEM) careers. The program included best practices in adult education and diverse resources to empower teachers to integrate STEM career information into their classrooms. The introductory unit, Using Bioinformatics: Genetic Testing, uses bioinformatics to teach basic concepts in genetics and molecular biology, and the advanced unit, Using Bioinformatics: Genetic Research, utilizes bioinformatics to study evolution and support student research with DNA barcoding. Pre–post surveys demonstrated significant growth (n = 24) among teachers in their preparation to teach the curricula and infuse career awareness into their classes, and these gains were sustained through the end of the academic year. Introductory unit students (n = 289) showed significant gains in awareness, relevance, and self-efficacy. While these students did not show significant gains in engagement, advanced unit students (n = 41) showed gains in all four cognitive areas. Lessons learned during Bio-ITEST are explored in the context of recommendations for other programs that wish to increase student interest in STEM careers. 相似文献
892.
Cathryn Kabacoff Vasudha Srivastava Douglas N. Robinson 《CBE life sciences education》2013,12(3):410-418
Internships are an effective way of connecting high school students in a meaningful manner to the sciences. Disadvantaged minorities have fewer opportunities to participate in internships, and are underrepresented in both science, technology, engineering, and mathematics majors and careers. We have developed a Summer Academic Research Experience (SARE) program that provides an enriching academic internship to underrepresented youth. Our program has shown that to have a successful internship for these disadvantaged youth, several issues need to be addressed in addition to scientific mentoring. We have found that it is necessary to remediate and/or fortify basic academic skills for students to be successful. In addition, students need to be actively coached in the development of professional skills, habits, and attitudes necessary for success in the workplace. With all these factors in place, these youths can become better students, compete on a more level playing field in their internships, and increase their potential of participating actively in the sciences in the future. 相似文献
893.
Sister M. Claire Madeleine S.N.J.M. 《College Teaching》2013,61(1):31-33
The authors explore how and to what extent students use their textbooks. Data was collected through a survey regarding when reading is primarily done, how the textbook is used for studying, and which specific study strategies the students used. The results indicate that students know it is important to read, know the professor expects them to read, and know it will impact their grade, yet most students still do not read the textbook. Finally, we also examine what students feel would motivate them to increase their usage of the textbook. 相似文献
894.
In interpersonal relationships characterized by aggression, the negotiation of conflict is especially significant. The present study examined the conflict management strategies used by 31 individuals who had experienced verbal and/or physical aggression during conflicts with their partners. Sillars’ (1986) conflict tactics coding system was used as a framework to analyze 960 pages of transcribed data. The results of this deductive content analysis indicated that the participants reported using primarily Distributive conflict strategies. Analytic induction was also used to interpret nonverbal forms of conflict management, revealing three common tactics: crying, nonverbal avoidance, and aggression. Implications for using these conflict strategies in interpersonal relationships characterized by aggression are discussed. 相似文献
895.
This study explored the relationship between effective instructor behavior—instructor confirmation—and a potentially negative student behavior—instructional dissent. Previous studies demonstrate that student characteristics provide a limited explanation for how students express dissent (e.g., Goodboy & Myers, 2012). Thus, scholars have begun to investigate the influence of instructor behaviors along with student characteristics to understand why students express dissent (LaBelle, Martin, & Weber, 2013). This study revealed that instructor confirmation negatively related to expressive and vengeful dissent, but not rhetorical dissent. Further, the three dimensions of instructor confirmation functioned differently in accounting for variance in expressive and vengeful dissent. Future research should build towards a model of instructional dissent model that reflects the unique characteristics of the instructional context and modifiable instructor behaviors. 相似文献
896.
Vito N. Silvestri 《Communication Studies》2013,64(3):178-186
Roosevelt urged war preparation and active retaliation when neutral policies prevailed and when the mood of the nation was one of noninvolvement abroad. 相似文献
897.
Dennis N. Ocholla 《International Information and Library Review》2013,45(3):119-143
This paper discusses the information-seeking behaviour of academics in relation to the productivity of academics in South African Universities, with particular reference to the University of Zululand, through a survey of 105 academics. It was established that the nature of the discipline and the rank of the academic, which normally corresponds with the academic qualification, experience, exposure and research productivity level, largely determine the information-seeking behaviour. Academics mainly need information for career development, and occupational and professional needs. Furthermore, university libraries, which currently face budget cuts on acquisitions, still play a pivotal role in information access by the academics. It is confirmed that the use of “local environment” is dominant for intra- and inter-university information access network and system. It is recommended that avenues that work colleagues can use to interact should be supported, and career challenges that stimulate productivity by academics, such as research and publication, should be maintained and sustained. 相似文献
898.
Felix N. Ubogu 《International Information and Library Review》2013,45(2-3):249-259
Rhodes University mounted its first digital thesis on the World Wide Web in 1998 and became the first institution in Africa to do so. Since then, the number of available theses and dissertations has steadily increased as more students come to appreciate the importance of submitting digital files or their theses. Also, the university Senate has now made it mandatory for students to submit digital files of their theses and dessertations. In order to make electronic theses and dissertations (ETD) produced by tertiary institutions in Southern Africa readily available, universities in the Southern African region were invited to join in the ETD initiative. This would lead to the building of a digital library of theses and dissertations in the region. A few institutions have responded positively and, based on the adoption of our approach, have speedily gained approval of their governing bodies to embark on ETD projects. In addition, the South East Academic Libraries (SEALS), a library consortium of tertiary institutions in the Eastern Province of South Africa, is considering an ETD programme since this would promote collaboration between research programmes at separate universities/technikons by making research work visible and accessible via a network archive.It is, however, surprising that some institutional leaders appear not to have realized that the digital revolution makes it imperative for institutions to use digital and publishing technologies innovatively in the provision of information as well as in the preservation and dissemination of the institutions' intellectual property.The paper will review existing African theses and dissertation projects, including the Database of African Theses and Dissertations (DATAD) and the African Universities Dissertations Abstracts (AFUDA) projects, it will discuss the status of the Rhodes University project, responses from other institutions in the region and make suggestions for accelerated involvement of tertiary institutions in Africa, especially Southern Africa, in the international network of theses and dissertations. 相似文献
899.
We were shooting on the steps of the Metropolitan Museum one night. It was lit romantically, and Jennifer was wearing an evening gown, looking incredibly stunning. Suddenly there must have been a thousand people screaming her name. It was like witnessing this icon. (Ralph Fiennes in the New York Times, 2002, p. 16, emphasis added) This stamp, honoring a Mexican artist who has transcended “la frontera” and has become and icon to Hispanics, feminists, and art lovers, will be a further reminder of the continuous cultural contributions of Latinos to the United States. (Cecilia Alvear, President of National Association of Hispanic Journalists (NAHJ) on the occasion of the introduction of the Frida Kahlo U.S. postage st& 2001; emphasis added) “Nothing Like the Icon on the Fridge” (column about Salma Hayek’s Frida by Stephanie Zacharek in the New York Times, 2002). 相似文献
900.
Ralph N. Sargent Rene L. Ash John Hales George Fox 《Communication Booknotes Quarterly》2013,44(4):48-49
Ralph N. Sargent's Preserving the Moving Image (Washington: Corporation for Public Broadcaiting and National Endowment for the Arts, 1974---$3.95, paper) Rene L. Ash's The Motion Picture Film Editor (Metuchen, N.J.: Scarecrow Press, 1974---$6.00) John Hales (ed.) Computer Animation (New York: Hastings House, 1974---$20.00) George Fox's Earthquake: The Story of a Movie (New York: Signet Film Series, 1974---$1.25, paper) 相似文献