首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   37130篇
  免费   736篇
  国内免费   5篇
  37871篇
  2018年   548篇
  2017年   500篇
  2016年   586篇
  2015年   417篇
  2014年   507篇
  2013年   3418篇
  2012年   875篇
  2011年   901篇
  2010年   585篇
  2009年   551篇
  2008年   859篇
  2007年   760篇
  2006年   715篇
  2005年   605篇
  2004年   581篇
  2003年   615篇
  2002年   588篇
  2001年   1176篇
  2000年   1129篇
  1999年   864篇
  1996年   492篇
  1995年   476篇
  1994年   462篇
  1993年   439篇
  1992年   903篇
  1991年   805篇
  1990年   804篇
  1989年   710篇
  1988年   716篇
  1987年   693篇
  1986年   697篇
  1985年   682篇
  1984年   604篇
  1983年   501篇
  1982年   393篇
  1981年   411篇
  1980年   381篇
  1979年   571篇
  1978年   429篇
  1976年   391篇
  1975年   530篇
  1974年   525篇
  1973年   592篇
  1972年   563篇
  1971年   502篇
  1970年   445篇
  1969年   435篇
  1968年   544篇
  1967年   459篇
  1966年   445篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
871.

Articles

Interview with Dr. Peter Rutter, author ofSex in the Forbidden Zone, July 27, 1990  相似文献   
872.
A resource dependency framework (Pfeffer & Salancik, 1978) is applied to general manager (GM) selection decisions. Hypotheses are developed predicting associations between organizational contextual features (environmental instability, strategy, organizational performance, size) and background characteristics of GMs selected to head business units (organizational familiarity, functional experience, age). Data were collected on 40 recent GM selection decisions. Findings indicate that organizational contextual features influence the type of GM selected. Key results are that industry instability, organizational strategy, and organizational size were associated with GMs'organizational familiarity (i.e., tenure levels), and that organizational strategy was associated with the age of selected GMs. This study provides support for the application of a contingency perspective to human resource management.  相似文献   
873.

Treatment of rats with the potent antiaggressive compound eltoprazine hydrochloride (1.0 & 2.0 mg/kg) slowed both predatory attack and killing of frogs. These results demonstrate a specific predation-inhibiting action of the drug which is not obscured by the elements of conspecific aggression seen during muricide. Unlike the closely related compound fluprazine, eltoprazine increased both attack and kill latencies implying that the effects of the two drugs on predation are mediated by at least somewhat distinct drug actions. It is further suggested that eltoprazine may be more specifically antiaggressive in its actions than related phenylpiperazine compounds.

  相似文献   
874.
319 3rd and 5th grade children were asked to rate their parents' job satisfaction. These ratings were compared to parents' self-reports of job satisfaction. Older children were more accurate in their estimates. Girls were more accurate in rating their mothers, while boys were more accurate in rating fathers. Children who perceived their parents as satisfied with their jobs were more likely to aspire to their parents' occupations than those who rated their parents less satisfied.  相似文献   
875.
Effect of boredom proneness on time perception   总被引:1,自引:0,他引:1  
As part of a larger study examining attribution differences in boredom, the effect of Boredom Proneness on perception of time passage was investigated in 110 undergraduates completing a tedious number-circling task. Highly boredom-prone individuals perceived time as passing more slowly during the task than low boredom-prone persons, but the two groups did not differ in their objective or chronometric time-passage estimates. The findings support the contention that depressed affect produces a subjective slowing of time but does not alter the perception of objective passage of chronometric time.  相似文献   
876.
Considers a preventive intervention effort designed to modify the characteristics and regularities of the school environment so as to enhance the expectations conveyed to high risk students. Employing this case effort (Weinstein et al., 1991) as a base, several issues are highlighted that deserve greater attention in the design, implementation, assessment, and reporting of other preventively-focused social interventions. These issues include: (1) the degree of program implementation fidelity, (2) the impact a lack of attainment of program fidelity may have on arriving at erroneous evaluation conclusions about social programs, (3) the ways in which the theory and basic research employed in the program rationale is appropriate to and reflected in the program as designed, (4) issues of program potency and dosage, (5) the ways in which quantitative and qualitative evaluation data can enhance each other, and (6) the import of evaluability assessments of programs prior to moving to outcome evaluations. In addressing these issues, the importance of developmentally- and ecologically-informed program formulations is underscored. Finally, the critical role that program reports such as the Weinstein paper, with its careful discussion of both the process of implementation and outcome assessments, can play in the development of more effective prevention program implementation efforts is highlighted.  相似文献   
877.
In this study of auditory prestimulation cues, picture naming performances under phonemic and semantic conditions were compared to picture naming performance under a neutral condition. Twenty aphasic subjects named 324 pictures (108 pictures x 3 conditions) each. Responses were scored using a coding system adapted by the investigator from classification systems used by Williams and Canter (1982) and Kohn and Goodglass (1985). Results indicated that naming accuracy was facilitated by phonemic and semantic cues. An examination of the distribution of errors under the three conditions revealed systematic effects of phonemic and semantic cues on the frequency of occurrence of specific error types. Increases in semantic paraphasia proportion scores and decreases in unrelated word error proportion scores were associated with the semantic condition, while increases in phonemic paraphasia proportion scores were associated with the phonemic condition. The finding that naming performance of aphasic adults varies as a function of the type of information provided by the cue is discussed in relation to cascade visual confrontation naming models.  相似文献   
878.
Task dynamics corresponding to rhythmic movements emerge from interactions among dynamical resources composed of the musculature, the link segments, and the nervous and circulatory systems. This article investigated whether perturbations of interlimb coordination might be effect over circulatory and nervous elements. Stiffness of wrist-pendulums oscillated at a common tempo and at 180 degrees relative phase was perturbed through the use of tonic activity about an ankle. Left and right stiffnesses, the common period, and the phase relation all changed. Stiffnesses increased with ankle torque in proportion to the wrist's inertial load. Despite different changes in stiffness at the two wrists, isochrony was preserved. The stability was shown to be consistent with the proportionality of changes in stiffness to the inertial loads. The phase departed from antiphase in proportion to the asymmetry of inertial loads. The size of departures decreased with increasing ankle torque. An account was developed in terms of muscular, circulatory, and nervous functions.  相似文献   
879.
Twenty reading comprehension-disabled (CD) and 20 reading comprehension and word recognition-disabled (CWRD), right-handed male children were matched with 20 normal-achieving age-matched controls and 20 normal-achieving reading level-matched controls and tested for left ear report on dichotic listening tasks using digits and consonant-vowel combinations (CVs). Left ear report for CVs and digits did not correlate for any of the groups. Both reading-disabled groups showed lower left ear report on digits. On CVs the CD group showed a high left ear report but only when there were no priming precursors, such as directions to attend right first and to process digits first. Priming effects interfered with the processing of both digits and CVs. Theoretically, the CWRD group seems to be characterized by a depressed right hemisphere, whereas the CD group may have a more labile right hemisphere, perhaps tending to overengagement for CV tasks but vulnerable to situational precursors in the form of priming effects. Implications extend to (1) subtyping practices in research with the learning-disabled, (2) inferences drawn from studies using different dichotic stimuli, and (3) the neuropsychology of reading disorders.  相似文献   
880.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号