全文获取类型
收费全文 | 15085篇 |
免费 | 241篇 |
国内免费 | 22篇 |
专业分类
教育 | 10648篇 |
科学研究 | 1578篇 |
各国文化 | 159篇 |
体育 | 1214篇 |
综合类 | 6篇 |
文化理论 | 104篇 |
信息传播 | 1639篇 |
出版年
2021年 | 168篇 |
2020年 | 247篇 |
2019年 | 346篇 |
2018年 | 462篇 |
2017年 | 442篇 |
2016年 | 420篇 |
2015年 | 289篇 |
2014年 | 388篇 |
2013年 | 2686篇 |
2012年 | 352篇 |
2011年 | 370篇 |
2010年 | 308篇 |
2009年 | 262篇 |
2008年 | 303篇 |
2007年 | 270篇 |
2006年 | 262篇 |
2005年 | 232篇 |
2004年 | 262篇 |
2003年 | 233篇 |
2002年 | 205篇 |
2001年 | 461篇 |
2000年 | 308篇 |
1999年 | 278篇 |
1998年 | 131篇 |
1997年 | 166篇 |
1996年 | 145篇 |
1995年 | 134篇 |
1994年 | 149篇 |
1993年 | 125篇 |
1992年 | 191篇 |
1991年 | 200篇 |
1990年 | 198篇 |
1989年 | 209篇 |
1988年 | 188篇 |
1987年 | 172篇 |
1986年 | 180篇 |
1985年 | 216篇 |
1984年 | 168篇 |
1983年 | 152篇 |
1982年 | 137篇 |
1981年 | 133篇 |
1980年 | 122篇 |
1979年 | 171篇 |
1978年 | 138篇 |
1977年 | 123篇 |
1976年 | 102篇 |
1975年 | 117篇 |
1974年 | 108篇 |
1973年 | 112篇 |
1971年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Controversy concerning the issue of homosexual rights and practiceshas intensified in Britain over the last decade. Despite thisincrease in intensity, however, the question of mass publicopinion in relation to homosexual rights and practices has receivedalmost no empirical investigation. In an effort to remedy thissituation, this article focuses on both the role of respondents'gender as well as their perceptions concerning the gender ofparticipants in a homosexual relationship (both sexes versusgay men) in distinguishing their attitudes toward the publicacceptance of homosexuals and the adoption rights of lesbiansand gay men. Using nationally representative data from the BritishSocial Attitudes Surveys, we found that, whereas both respondents'gender and the gender of participants in a homosexual relationshipdemonstrated a significant influence on attitudes toward thepublic acceptance of homosexuals, they were unrelated to theadoption rights of lesbians or gay men. Even in relation tothe public acceptance of homosexuals, however, gender was notthe only, or even the most important, attribute in distinguishingindividual opinion in this instance. Other stronger and moreconsistent influences were education, age, and attitudes towardeither pre-marital or extra-marital sexual relations. The implicationsof these findings for both policy makers and homosexual activistsare discussed. 相似文献
73.
Emily Myers 《Journal of Personnel Evaluation in Education》1993,7(1):67-79
Conclusion Supervision, the most prevalent of the control mechanisms studied, was used in all of the schools to varying degrees. The frequency of superintendent visits fluctuated between a high of almost every day, in the case where the superintendent and the principal shared the same facility, to two times a year. Superintendents did visit schools without formal sessions with the principals. Several principals described their superintendents' visits as informal walk-throughs. District size did not influence the frequency of supervision by the superintendents. Schools in both large and small districts received roughly the same number of visits. Ninety-two percent of the principals received a medium or high number of visits. In some schools, particularly unit districts composed of grades kindergarten through 12, principals were evaluated by associate superintendents for secondary education. Central office personnel usually visited several times each month. Principals from large districts received fewer visits from central office staff than did principals from medium or small districts. Most principals perceived the visits by their superintendents and central office personnel as nonthreatening. When superintendents and central office administrators visited schools, they added to the system of control by collecting information about all aspects of schooling, including the climate. In general, principals perceived supervision as light, and felt that schools and principals were afforded considerable autonomy.Vanderbilt University 相似文献
74.
One of the highest priorities in today's hospitals is the provision of quality care to patients. The medical librarian has an increased responsibility to furnish quality information to the medical staff. Traditional methods of reference service continue to work well, but it is increasingly important for librarians to become more directly involved in hospital quality assurance (QA) activities. Occurrence screening is one system of QA where the librarian can make a difference. 相似文献
75.
76.
77.
78.
Stock CJ 《Bulletin of the Medical Library Association》1977,65(1):53-57
You are invited to Seattle for the 1977 Annual Meeting, its theme to be "Change, Comparison, and Controversy." Suggestions are made for activities in Seattle and the Pacific Northwest, including the cohost city, Vancouver, British Columbia. 相似文献
79.
Indexing consistency in MEDLINE 总被引:3,自引:0,他引:3
The quality of indexing of periodicals in a bibliographic data base cannot be measured directly, as there is no one "correct" way to index an item. However, consistency can be used to measure the reliability of indexing. To measure consistency in MEDLINE, 760 twice-indexed articles from 42 periodical issues were identified in the data base, and their indexing compared. Consistency, expressed as a percentage, was measured using Hooper's equation. Overall, checktags had the highest consistency. Medical Subject Headings (MeSH) and subheadings were applied more consistently to central concepts than to peripheral points. When subheadings were added to a main heading, consistency was lowered. "Floating" subheadings were more consistent than were attached subheadings. Indexing consistency was not affected by journal indexing priority, language, or length of the article. Terms from MeSH Tree Structure categories A, B, and D appeared more often than expected in the high-consistency articles; whereas terms from categories E, F, H, and N appeared more often than expected in the low-consistency articles. MEDLINE, with its excellent controlled vocabulary, exemplary quality control, and highly trained indexers, probably represents the state of the art in manually indexed data bases. 相似文献
80.