全文获取类型
收费全文 | 59271篇 |
免费 | 1201篇 |
国内免费 | 7篇 |
专业分类
60479篇 |
出版年
2020年 | 567篇 |
2019年 | 619篇 |
2018年 | 860篇 |
2017年 | 914篇 |
2016年 | 989篇 |
2015年 | 709篇 |
2014年 | 837篇 |
2013年 | 4087篇 |
2012年 | 1628篇 |
2011年 | 1659篇 |
2010年 | 1055篇 |
2009年 | 975篇 |
2008年 | 1452篇 |
2007年 | 1446篇 |
2006年 | 1277篇 |
2005年 | 1199篇 |
2004年 | 1136篇 |
2003年 | 1044篇 |
2002年 | 1088篇 |
2001年 | 1855篇 |
2000年 | 1804篇 |
1999年 | 1338篇 |
1998年 | 621篇 |
1997年 | 532篇 |
1992年 | 1220篇 |
1991年 | 1125篇 |
1990年 | 1169篇 |
1989年 | 1049篇 |
1988年 | 1017篇 |
1987年 | 1014篇 |
1986年 | 1038篇 |
1985年 | 1105篇 |
1984年 | 855篇 |
1983年 | 809篇 |
1982年 | 571篇 |
1981年 | 551篇 |
1979年 | 989篇 |
1978年 | 666篇 |
1977年 | 633篇 |
1976年 | 597篇 |
1975年 | 865篇 |
1974年 | 976篇 |
1973年 | 990篇 |
1972年 | 876篇 |
1971年 | 815篇 |
1970年 | 777篇 |
1969年 | 821篇 |
1968年 | 1044篇 |
1967年 | 904篇 |
1966年 | 859篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
161.
Royda Crose Donald R. Nicholas David C. Gobble Beth Frank 《Journal of counseling and development : JCD》1992,71(2):149-156
An expanded view of health is advocated for assessment and treatment of individual clients in helping them achieve and maintain their maximum potential for high-level wellness. In addition, moderating variables, such as culture, age, and gender differences, have an impact on every dimension of health and wellness. In this article a multidimensional systems model for wellness is described, and gender differences along those dimensions are reviewed. Application of the model and implications for counseling are discussed. Finally, two illustrative case examples, one man and one woman, are described. 相似文献
162.
Gerontologists have long been concerned with the impact of individual-difference factors on memory. This study used a large sample (N = 2,495) of adult volunteers aged 18 to 90 years to determine if a set of individual-difference variables--vocabulary, education, depression, gender, marital status, and employment status--mediates the effects of aging on a wide range of laboratory-analogue tests of everyday memory. The data indicated that age was consistently the most significant predictor of memory performance, followed by vocabulary and gender. Vocabulary totally mediated age effects on a prose memory measure, and partial mediation of aging effects--primarily by vocabulary and gender--was observed on 5 other memory tests. These data suggest that when health samples of volunteers serve as research subjects, these individual differences can affect some memory test scores, but age remains the best overall predictor of memory performance. 相似文献
163.
Short-term memory for actions was investigated for young adult and elderly adult subjects with the Brown-Peterson procedure at retention intervals of 0 and 15 s. The short-term memory trials were followed by the long-term recall of the prior to-be-remembered actions. The 15-s retention interval was filled either with no activity or with 1 of 3 different interfering activities. Verbal interference had little effect on short-term memory at either age level. Actions performed in the interval either by the subjects or by the experimenter produced significantly lower recall scores at each age level, with the decrement being more pronounced for the elderly than for the young subjects. The long-term memory results indicated that successful short-term recall enhanced later long-term recall, regardless of age level. 相似文献
164.
Marcel A. G. van Aken 《欧洲人格杂志》1992,6(4):267-282
The development of competence was studied in a longitudinal sample of 98 children, with measurement points when the children were 7, 10, and 12 years old. Competence was defined in terms of adequate adaptation to developmental tasks, both on a general and on a domain-specijic level. The general form of competence was measured by ego-resiliency, reflecting fexibility and ability to solve developmental problems Domain-specific competencies were measured by school achievement and social preference. The results showed that ego-resiliency was related to the two domain-specific competencies, although the hypothesized causal direction from general competence to specific competencies was not supported. Both domain-specific competencies were found to have a feedback effect on ego-resiliency. This feedback effect was stronger for social preference. These results suggest a transactional relationship between general and domain-specific competencies, and point to the importance of domain-specific competencies (especially social preference by the peer group) in the development of general competence in the child. 相似文献
165.
H. G. Coenen 《Argumentation》1992,6(3):321-336
Aristotle considers all examples, as far as they are used as rhetorical arguments, to be inductions (Rhetoric 1, 2, 8). On the other hand, he finds it worthwhile to distinguish different kinds of examples (viz., historical example, comparison, and fable). Moreover, comparisons and fables are said to be made by the orator, whereas historical examples are not (Rhetoric 2, 20, 2s). The present article attempts to explain this opposition.A close examination of what can be meant by induction reveals that this term applies differently to historical examples and to comparisons and fables. In a broader sense, all examples can be called inductions, insofar as a certain logical relation, different from the syllogistic one, obtains between conclusion and premises. This relation, however, is unable to explain why examples can serve as arguments. Applied to historical examples only, the term induction preserves its original meaning of checking samples in a number sufficient to yield generalization. In its narrow sense, induction gives a satisfactory account of how historical examples work. As for comparisons and fables — to which induction applies in a broader sense only — Aristotle fails to explain what makes them arguments. The explanation, missing in Rhetoric 2, 20, can, however, be given according to the general lines of Aristotelian dialectics and rhetorics. The main task of comparison and fable is to elaborate a so far unconsidered middle term (M) meeting the following conditions: the hearer is prepared to agree that M applies to the subject of the conclusion and that the predicate of the conclusion applies to M. All examples make use of a general proposition from which their conclusion can be inferred. Historical examples (like real inductions) produce instances, in order to confirm a proposition previously admitted as suitable premise, provided that its truth can be proved. Comparison and fables, by introducing a new middle term, try to form a premise susceptible of being admitted without proof.
La classification des exemples d'après Aristote (Rhétorique 2,20)相似文献
166.
167.
M H Huang S S Hull R D Foreman R Lazzara S Wolf 《Integrative Physiological and Behavioral Science》1992,27(1):6-12
The shortening of the QT interval of the electrocardiogram coincident with acceleration of heart rate and vice versa has been accepted for many years as evidence that the action potential duration and hence QT are necessarily dependent on heart rate. Exceptions to this rule have been attributed to the intervention of counteracting autonomic effects. In order to test this assumption, 26 conscious dogs divided into three groups were tested during baroreceptor stimulation by a bolus injection of phenylephrine. Seventeen dogs had been used in earlier studies in which they had undergone an experimental anterior myocardial infarction with apparent full recovery. A group of those dogs underwent beta-adrenergic blockade by intravenous atenolol 30 min prior to the baroreceptor activation. To test the intactness of the baroreceptor responses in the previously infarcted dogs, a third group of nine dogs that had had no prior myocardial infarction was included. All dogs were adapted to the laboratory environment and were not sedated during experiments. Simultaneous recordings of RR, QT interval, and phasic arterial pressure were made in all dogs before and during baroreceptor stimulation. In the normal group, and the previously infarcted group that received no atenolol, baroreceptor stimulation elicited a small (8/msec), but significant prolongation of the QT associated with a nearly 50% reduction in heart rate. The QT interval of the atenolol-treated dogs, although significantly more prolonged before stimulation, remained unchanged during the reflex. The data indicate that withdrawal of ventricular sympathetic tone may prolong the QT interval, thereby confirming the role of sympathetic innervation in the control of QT.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
168.
A survey of the 37 psychology departments offering courses accredited by the Australian Psychological Society yielded a 92% response rate. Sixty-eight percent of departments employed students as research subjects, with larger departments being more likely to do so. Most of these departments drew their student subject pools from introductory courses. Student research participation was strictly voluntary in 57% of these departments, whereas 43% of the departments have failed to comply with normally accepted ethical standards. It is of great concern that institutional ethics committees apparently continue to condone, or fail to act against, unethical research practices. Although these committees have a duty of care to all subjects, the final responsibility for conducting research in an ethical manner lies with the individual researcher. 相似文献
169.
Giles R Scofield 《Kennedy Institute of Ethics journal》1992,2(1):4-12
...Instead of and certainly before advising the school or S.A. to go into court, I would urge them to try to resolve the question where it arises -- in the classroom, not the courtroom. And I would ask school officials to try to place themselves in S.A.'s shoes, and to imagine how she feels about her situation; and to ask themselves how they will feel if they administer CPR against her and her parents' wishes. Is there no way that they can do more than nothing, but less than CPR? Which image would we prefer to attach to S.A.'s case, that of some lawyers giving a press conference on the courthouse steps or of a story about a school that made it possible for one of its students to spend her precious time with her friends, classmates, and teachers, as they learn together that death does not need to separate the living from the dying? 相似文献
170.
We examined two systems of assessing family interactions that are in common usage: a home based observation of free parent-child interaction and a clinic based observation of a structured mother-child problem solving discussion. Participants were 18 depressed, 27 conduct disordered and 16 comparison children and their mothers. Results indicated that: 1) these observations may yield very different data about child, and to a lesser extent, parent behavior, 2) parental affect in the clinic was related to their level of aversive behaviour in the home, 3) levels of both aversive and positive behavior for children and their mothers were correlated within each setting, 4) accuracy of diagnostic classifications made on the basis of the observational data were highest for comparison and conduct disordered children, but lowest for depressed children observed in the clinic, and 5) the inclusion of data on mothers' behavior increased classification accuracy for conduct disordered children only. 相似文献