全文获取类型
收费全文 | 10792篇 |
免费 | 387篇 |
国内免费 | 3篇 |
出版年
2021年 | 57篇 |
2020年 | 112篇 |
2019年 | 131篇 |
2018年 | 281篇 |
2017年 | 308篇 |
2016年 | 391篇 |
2015年 | 249篇 |
2014年 | 217篇 |
2013年 | 789篇 |
2012年 | 546篇 |
2011年 | 574篇 |
2010年 | 215篇 |
2009年 | 234篇 |
2008年 | 294篇 |
2007年 | 309篇 |
2006年 | 276篇 |
2005年 | 1527篇 |
2004年 | 868篇 |
2003年 | 631篇 |
2002年 | 345篇 |
2001年 | 128篇 |
2000年 | 122篇 |
1999年 | 129篇 |
1998年 | 96篇 |
1997年 | 88篇 |
1996年 | 97篇 |
1995年 | 90篇 |
1994年 | 88篇 |
1993年 | 63篇 |
1992年 | 106篇 |
1991年 | 102篇 |
1990年 | 110篇 |
1989年 | 94篇 |
1988年 | 74篇 |
1987年 | 83篇 |
1986年 | 82篇 |
1985年 | 91篇 |
1984年 | 84篇 |
1983年 | 69篇 |
1982年 | 75篇 |
1981年 | 72篇 |
1980年 | 52篇 |
1979年 | 84篇 |
1978年 | 53篇 |
1977年 | 73篇 |
1976年 | 50篇 |
1975年 | 74篇 |
1974年 | 70篇 |
1973年 | 75篇 |
1972年 | 60篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
Roger P. Weissberg Emory L. Cowen Bohdan S. Lotyczewski Mary F. Boike N. Ahvay Orara Peter Stalonas Sharon Sterling Ellis L. Gesten 《American journal of community psychology》1987,15(4):387-401
Teacher-rated adjustment differences among young elementary school children from (a) a recent sample and a 1974 cohort, and (b) urban/suburban, male/female, and grade-level subgroups were examined. A problem behavior checklist (Classroom Adjustment Rating Scale) and a school competence measure (Health Resources Inventory) for 974 children from 5 urban and 5 suburban schools were completed by 101 first- to fourth-grade teachers. Children from the more current cohort were rated as significantly more maladjusted than those from the earlier sample on 8 of 10 adjustment variables. In the recent sample, girls and suburban children evidenced a greater number of school competencies and fewer problem behaviors than boys and urban children, respectively. The implications of these findings for the future use of the teacher rating scales are discussed. 相似文献
83.
Electromagnetic articulography: use of alternating magnetic fields for tracking movements of multiple points inside and outside the vocal tract 总被引:3,自引:0,他引:3
The purpose of this paper is to present a new electromagnetic device which uses alternating magnetic fields for tracking movements of multiple points inside and outside the vocal tract. It is biologically safe, noninvasive, it does not interfere with speech movements, allows for multiple recording in the same subject, and for easy collection of large amounts of data. It is especially suitable for evaluation of patients with speech motor impairments. 相似文献
84.
85.
Peter Gärdenfors 《Studia Logica》1987,46(4):321-327
The purpose of this note is to formulate some weaker versions of the so called Ramsey test that do not entail the following unacceptable consequenceIf A and C are already accepted in K, then if A, then C is also accepted in K. and to show that these versions still lead to the same triviality result when combined with a preservation criterion. 相似文献
86.
Peter Carruthers 《Synthese》1987,73(2):205-224
The paper puts forward the thesis of conceptual pragmatism: that there are pragmatic choices to be made between distinct but similar concepts within various contexts. It is argued that this thesis should be acceptable to all who believe in concepts, whether the believers are platonists, realists or anti-realists. It is argued that the truth of the thesis may help to resolve many long-standing debates, and that in any case it will lead to an extension of philosophical method. The paper then briefly considers the concepts of belief and desire as a case-study, and argues for the recognition of the practical reasoner's stance (to stand alongside Dennett's intentional stance), relative to which we should select concepts of belief and desire which are broadly cartesian.I am grateful to the following for their help (varying from detailed comments and criticisms on earlier drafts, to general advice and encouragement): David Archard, Simon Blackburn, Jack Copeland, Dan Dennett, Susan Levi, Christopher McKnight, Derek Parfit, Michael Slote, Tim Williamson, and Crispin Wright. 相似文献
87.
88.
A report on the clinical testing of the lithium-retard medicament Contemnol (Spofa). It details the way lithium-retard treatment is objectively and subjectively superior to the earlier and still current general lithium treatment. 相似文献
89.
H J Otto E Willenberg D Müller R H?fs J Freitag A Fiedler R Steinke 《Psychiatrie, Neurologie, und medizinische Psychologie》1987,39(12):748-753
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth. 相似文献
90.
This is a report of the completion responses for 40 three-letter word stems (e.g., ABO) produced by 100 undergraduate students at the University of California at San Diego. The report includes a list of the different words that were written as stem completions, their frequency of occurrence as completions, and their frequency of occurrence in English according to published norms. This list of materials is useful for the construction of completion tests for future investigations of direct priming phenomena, and it may provide an important covariate in the analysis of performance on completion tests. Preliminary analyses of the results reveal three primary factors that determine overall performance on a stem-completion test: word frequency, word length, and meanings per word. Analyses of the completions produced for each individual word stem, however, reveal that usually only one of these factors makes a significant contribution to performance. 相似文献