全文获取类型
收费全文 | 24472篇 |
免费 | 1095篇 |
国内免费 | 16篇 |
出版年
2020年 | 348篇 |
2019年 | 415篇 |
2018年 | 605篇 |
2017年 | 578篇 |
2016年 | 607篇 |
2015年 | 434篇 |
2014年 | 531篇 |
2013年 | 2305篇 |
2012年 | 939篇 |
2011年 | 998篇 |
2010年 | 612篇 |
2009年 | 601篇 |
2008年 | 843篇 |
2007年 | 824篇 |
2006年 | 820篇 |
2005年 | 724篇 |
2004年 | 676篇 |
2003年 | 676篇 |
2002年 | 667篇 |
2001年 | 654篇 |
2000年 | 605篇 |
1999年 | 484篇 |
1998年 | 305篇 |
1997年 | 292篇 |
1996年 | 284篇 |
1995年 | 262篇 |
1994年 | 235篇 |
1993年 | 243篇 |
1992年 | 348篇 |
1991年 | 365篇 |
1990年 | 340篇 |
1989年 | 321篇 |
1988年 | 291篇 |
1987年 | 301篇 |
1986年 | 300篇 |
1985年 | 335篇 |
1984年 | 321篇 |
1983年 | 248篇 |
1982年 | 243篇 |
1981年 | 230篇 |
1980年 | 205篇 |
1979年 | 252篇 |
1978年 | 215篇 |
1977年 | 205篇 |
1976年 | 201篇 |
1975年 | 232篇 |
1974年 | 264篇 |
1973年 | 265篇 |
1972年 | 211篇 |
1968年 | 203篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
Gold SN 《Journal of personality assessment》1980,44(6):630-638
The present study was designed to assess the relation between Loevinger's hierarchy of ego development stages, measured by the Washington University Sentence Completion Test, and adjustment patterns as measured by the Minnesota Multiphasic Personality Inventory. A total of 150 high school students between the ages of 14 and 15, 75 boys and 75 girls, served as subjects. It was hypothesized that certain adjustment patterns were more prevalent at certain points of the ego development hierarchy than at others, specifically: (a) hypochondriasis and psychopathic deviance at the ego stages below conformity; (b) hysteria at the conformist ego level; and (c) obsessive-compulsiveness and paranoia at the ego stages above conformity. All of these hypotheses, except that regarding psychopathic deviance, were supported by the data. One unpredicted relationship, a tendency for depression to be most characteristic of the conformist ego group, was found. 相似文献
872.
Nurses can be seen to contribute significantly to the spiritual objectives and programs in hospitals and other health agencies under religious auspices. One impressive example is nursing involvement with and cooperation in the pastoral care program at North Carolina Baptist Hospital in Winston-Salem. At this hospital the nurse is both an assistant to and a coworker with the chaplain and functions in many ways as facilitator and supporter in his spiritual mission. 相似文献
873.
The study investigated the impact of a Summer Therapeutic Daycamp on the subsequent classroom behavior of behaviorally disordered children. Pre-post assessment of the maladaptive behavior of children participating in the program and of a control group one year subsequent to the program demonstrated the differential impact of the program, consistent with the notion of intensive, time-limited intervention as an effective alternative to extended treatment. 相似文献
874.
The present studies assessed the degree of stimulus control exerted by S+ and S? without confoundings of stimulus novelty and stimulus ambiguity. In Experiment 1, rats were trained on two intercurrent simultaneous discrimination problems with nine times more training given on one than the other. Then the animals were given transfer tests with re-paired stimuli. The results showed that S? exerts greater stimulus control than S+ in a two-choice simultaneous discrimination. Experiment 2 provided a test of the possibility that the relative degree of control by S? varies with different amounts of training. Three groups were trained on two intercurrent simultaneous discrimination problems; each group was given 7, 11, or 15 times more training on one problem than the other. Then transfer tests were given with re-paired stimuli. Again the results showed that S? exerts greater stimulus control than S+ in a two-choice simultaneous discrimination. 相似文献
875.
G. N. Georgacarakos 《Studia Logica》1980,39(1):5-18
The fact that it is possible to define three different material conditionals in orthomodular lattices suggests that there exist three different orthomodular logics whose conditionals are material conditionals and whose models are orthomodular lattices. The purpose of this paper is to provide equationally definable implication algebras for each of these material conditionals. 相似文献
876.
877.
The roles which word class (open/closed) and sentential stress play in the sentence comprehension processes of both agrammatic (Broca's) aphasics and normal listeners were examined with a word monitoring task. Overall, normal listeners responded more quickly to stressed than to unstressed items, but showed no effect of word class. Aphasics also responded more quickly to stressed than to unstressed materials, but, unlike the normals, responded faster to open than to closed class words regardless of their stress. The results are interpreted as support for the theory that Broca's aphasics lack the functional underlying open/closed class word distinction used in word recognition by normal listeners. 相似文献
878.
Two randomly assigned groups, N = 7 each, of neurologically normal patients were composed. One group, RM, had regional cerebral blood flow measurements during a recognition memory probe test; the other group, SC, had rCBF measurements during a semantic classification task, using the same stimulus and response features as the RM task. Thus, the groups differed only in the cognitive instruction they were executing. The RM group showed a significantly lower change from resting baseline to activation, in mean left hemisphere initial slope index, than did the SC group. The RM group, but not the SC group, showed a significant inverse correlation between occipital flow and accuracy of memory performance as indicated by d′. Correlations between age and hemispheric initial slope index, and between homologous left and right hemisphere sites, were also described. The results are considered to support an anatomical basis for the distinction between episodic and semantic memory and to suggest that occipital flow may diminish with accurate memory performance because of an upstream demand of blood in the medial temporal lobes. 相似文献
879.
Single letters were presented tachistoscopically in the left or right hemifield to right-handed observers. Superior recognition of letters on the right was found for letters chosen from subsets containing four items, but no differences were found when any letter, or any symmetrical letter, could appear. In a second experiment, the right hemifield advantage was found under conditions requiring the subject to determine the subset only when the subset chosen was appropriate. Results were discussed in terms of the adequacy of language-based explanations of hemifield asymmetries in letter recognition. 相似文献
880.