全文获取类型
| 收费全文 | 21405篇 |
| 免费 | 119篇 |
| 国内免费 | 18篇 |
专业分类
| 教育 | 15446篇 |
| 科学研究 | 2309篇 |
| 各国文化 | 101篇 |
| 体育 | 1381篇 |
| 综合类 | 6篇 |
| 文化理论 | 484篇 |
| 信息传播 | 1815篇 |
出版年
| 2021年 | 73篇 |
| 2020年 | 130篇 |
| 2019年 | 207篇 |
| 2018年 | 2457篇 |
| 2017年 | 2396篇 |
| 2016年 | 1840篇 |
| 2015年 | 295篇 |
| 2014年 | 344篇 |
| 2013年 | 1867篇 |
| 2012年 | 444篇 |
| 2011年 | 976篇 |
| 2010年 | 1059篇 |
| 2009年 | 592篇 |
| 2008年 | 839篇 |
| 2007年 | 1380篇 |
| 2006年 | 229篇 |
| 2005年 | 545篇 |
| 2004年 | 615篇 |
| 2003年 | 548篇 |
| 2002年 | 284篇 |
| 2001年 | 162篇 |
| 2000年 | 185篇 |
| 1999年 | 162篇 |
| 1998年 | 78篇 |
| 1997年 | 95篇 |
| 1996年 | 115篇 |
| 1995年 | 83篇 |
| 1994年 | 100篇 |
| 1993年 | 92篇 |
| 1992年 | 165篇 |
| 1991年 | 157篇 |
| 1990年 | 147篇 |
| 1989年 | 136篇 |
| 1988年 | 108篇 |
| 1987年 | 112篇 |
| 1986年 | 132篇 |
| 1985年 | 125篇 |
| 1984年 | 108篇 |
| 1983年 | 128篇 |
| 1982年 | 109篇 |
| 1981年 | 100篇 |
| 1980年 | 84篇 |
| 1979年 | 158篇 |
| 1978年 | 106篇 |
| 1977年 | 97篇 |
| 1976年 | 100篇 |
| 1975年 | 69篇 |
| 1974年 | 86篇 |
| 1972年 | 68篇 |
| 1971年 | 66篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
71.
72.
73.
74.
Oppenheimer GJ 《Bulletin of the Medical Library Association》1977,65(4):455-456
75.
The present study examined three hypotheses regarding the consequences of early brain damage for academic achievement: First, early brain insults will have a negative impact on achievement, even in children with normal intelligence. Second, underachievement in these children will be at least partially independent of IQ (i.e., not fully accounted for by a lowering of IQ within the average range). Third, normally intelligent children with histories of brain insult will also manifest selective cognitive dysfunctions. To test these hypotheses, we compared two groups of children who had recovered from Haemophilus influenzae type b meningitis. The "complicated" group consisted of children who, as a consequence of having sustained neurologic complications during their illness, were more likely to have had brain insults. Children in the "uncomplicated" group did not have complications with their illness and were regarded as having escaped significant central nervous system (CNS) pathology. Only children with normal hearing and a prorated Full Scale IQ of at least 80 (WISC-R) were considered. Group differences on the Wide Range Achievement Test-Revised were consistent with the first two hypotheses. Although the two groups had similar Verbal IQs, the complicated group also had a lower mean Performance IQ and performed less well on perceptually demanding neuropsychological tasks. Findings suggest that learning disabilities may have selective, brain-related cognitive antecedents; but they challenge the practice of using IQ criteria for clinical diagnosis. 相似文献
76.
77.
G S Belleh 《Bulletin of the Medical Library Association》1975,63(2):199-208
The literature of medical librarianship of Nigeria is reviewed. The staff structure of Nigerian univeristy libraries and, in particular, of the medical libraries attached to them is restrictive, unprogressive, and unconducive to the development of medical librarianship in Nigeria. These medical libraries should cease to be administered and regarded as just unavoidable appendages of the main university libraries. They should be independent, full-fledged libraries of their own, recognixed as full academic departments of their respective colleges or faculties, with their heads being in no way inferior in status to other heads of academic departments.The granting of faculty status to Nigerian unviersity librarians should go the whole way and let the principle of multiple professorships be applied to the staff structure of unviersity libraries. Efforts are being made to effect bibliographic organization of Nigerian medical literature. A national library of medicine for Nigeria, however, humble its beginning, should be established. 相似文献
78.
79.
80.