全文获取类型
收费全文 | 22218篇 |
免费 | 286篇 |
国内免费 | 12篇 |
专业分类
教育 | 15732篇 |
科学研究 | 2165篇 |
各国文化 | 401篇 |
体育 | 1709篇 |
综合类 | 11篇 |
文化理论 | 141篇 |
信息传播 | 2357篇 |
出版年
2021年 | 179篇 |
2020年 | 261篇 |
2019年 | 412篇 |
2018年 | 542篇 |
2017年 | 580篇 |
2016年 | 514篇 |
2015年 | 330篇 |
2014年 | 445篇 |
2013年 | 4031篇 |
2012年 | 473篇 |
2011年 | 533篇 |
2010年 | 380篇 |
2009年 | 371篇 |
2008年 | 531篇 |
2007年 | 425篇 |
2006年 | 466篇 |
2005年 | 347篇 |
2004年 | 357篇 |
2003年 | 283篇 |
2002年 | 315篇 |
2001年 | 450篇 |
2000年 | 436篇 |
1999年 | 396篇 |
1998年 | 206篇 |
1997年 | 233篇 |
1996年 | 237篇 |
1995年 | 235篇 |
1994年 | 196篇 |
1993年 | 236篇 |
1992年 | 352篇 |
1991年 | 340篇 |
1990年 | 336篇 |
1989年 | 366篇 |
1988年 | 343篇 |
1987年 | 306篇 |
1986年 | 304篇 |
1985年 | 360篇 |
1984年 | 300篇 |
1983年 | 339篇 |
1982年 | 259篇 |
1981年 | 233篇 |
1980年 | 232篇 |
1979年 | 347篇 |
1978年 | 258篇 |
1977年 | 234篇 |
1976年 | 223篇 |
1975年 | 197篇 |
1974年 | 204篇 |
1973年 | 194篇 |
1971年 | 169篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
Despite difficulties, states frequently seek to compare their test performance with that of other states, or with the published national norms. All states have some students taking the Scholastic Aptitude Test (SAT) exams for college admissions, but because the numbers vary widely, when the state means are made public by the College Boards, there is debate about their interpretation. Here the 50 state SAT means are the criterion in a multivariate model, together with the state variables of percent taking the SATs (very influential), percent of minority in the state, average income, unemployment rate, and per pupil expenditure. Regression is analyzed (without expenditure) to examine the state residuals compared with the "expected" scores. And briefly noted is the difficulty of using alternative tests for such comparisons, as these are currently normed, selected, and used. 相似文献
996.
Edwin D. Posey 《Information processing & management》1985,21(4):379-380
997.
Carolyn D. Cowen 《Annals of dyslexia》1985,35(1):209-218
The Tutoring Network is a nonprofit organization that emphasizes rigorous screening of educational therapists and careful
matching of their expertise with the needs of learning-disabled students. It operates a clearinghouse for information pertinent
to learning disabilities and strives to facilitate better communication among professionals concerned with the learning-disabled.
This paper chronicles the birth and growth of The Tutoring Network and explores possibilities for replication. 相似文献
998.
999.
The paper describes the development and operation of joint study programme schemes, which lead to double awards. The essential prerequisites for an exchange programme are identified together with an evaluation of academic standards and teaching methods in each country. The process of obtaining equivalence and credit recognition between courses is presented, together with specific data relating to requirements for double awards. The experience gained in these exchange programmes is discussed and student performance is evaluated. 相似文献
1000.