全文获取类型
收费全文 | 67354篇 |
免费 | 2819篇 |
国内免费 | 31篇 |
出版年
2020年 | 852篇 |
2019年 | 1019篇 |
2018年 | 1427篇 |
2017年 | 1424篇 |
2016年 | 1517篇 |
2015年 | 1082篇 |
2014年 | 1334篇 |
2013年 | 6139篇 |
2012年 | 2414篇 |
2011年 | 2433篇 |
2010年 | 1489篇 |
2009年 | 1530篇 |
2008年 | 2125篇 |
2007年 | 2083篇 |
2006年 | 1960篇 |
2005年 | 1680篇 |
2004年 | 1687篇 |
2003年 | 1650篇 |
2002年 | 1559篇 |
2001年 | 2139篇 |
2000年 | 2000篇 |
1999年 | 1537篇 |
1998年 | 792篇 |
1997年 | 715篇 |
1996年 | 759篇 |
1995年 | 695篇 |
1994年 | 681篇 |
1993年 | 656篇 |
1992年 | 1228篇 |
1991年 | 1144篇 |
1990年 | 1108篇 |
1989年 | 1054篇 |
1988年 | 1009篇 |
1987年 | 958篇 |
1986年 | 970篇 |
1985年 | 1041篇 |
1984年 | 869篇 |
1983年 | 749篇 |
1982年 | 586篇 |
1981年 | 583篇 |
1979年 | 839篇 |
1978年 | 660篇 |
1977年 | 567篇 |
1976年 | 563篇 |
1975年 | 688篇 |
1974年 | 775篇 |
1973年 | 782篇 |
1972年 | 656篇 |
1971年 | 601篇 |
1968年 | 630篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
81.
David Temperley 《Cognitive Science》2019,43(2)
Main clause phenomena (MCPs) are syntactic constructions that occur predominantly or exclusively in main clauses. I propose a processing explanation for MCPs. Sentence processing is easiest at the beginning of the sentence (requiring less search); this follows naturally from widely held assumptions about sentence processing. Because of this, a wider variety of constructions can be allowed at the beginning of the sentence without overwhelming the sentence‐processing mechanism. Unlike pragmatic and grammatical accounts of MCPs, the processing account predicts avoidance of MCPs in non‐initial main clauses (non‐initial coordinate clauses and premodified clauses). A corpus study supports these predictions, but it is somewhat inconclusive. A further corpus study examines another type of syntactic construction, premodifying adjunct phrases (“openers”); the prediction here is that less common types of opener will be especially avoided in non‐initial contexts. The prediction is confirmed, supporting the processing view of rare constructions. 相似文献
82.
83.
This study examined information communication technologies and workplace friendship dynamics. Employees reported factors that influenced their initiation of friendship with a coworker and reported patterns and perceptions of communication with their workplace friend via different communication methods. Results indicated that personality, shared tasks, and perceived similarity are the most important factors to coworker friendship initiation, and the importance of physical proximity to workplace friendship is diminishing in the electronically connected workplace. Results confirm the primacy of face‐to‐face interaction for workplace friendship initiation and maintenance. E‐mail, phone, and texting were also central to communication among workplace friends. The amount of time spent telecommuting affected workplace friendship initiation and communication. Finally, generational differences were identified with respect to Internet‐based communication methods. 相似文献
84.
David S. Geldmacher 《Brain and cognition》1996,32(3):405-415
Cancellation tests are commonly used in the clinical assessment of visuospatial function, but there has been little study of task characteristics influencing performance. This study was designed to assess factors which affect cancellation performance. Sixteen healthy subjects sequentially performed four random-array letter cancellation tasks. The forms contained 50 and 100 stimuli and target:distractor (T/D) ratios of 1:4 and 1:9 with target letter “A” and randomly selected letter distractors. The primary performance measure was calculated as the number of correctly cancelled targets divided by the time to complete the task, corrected for accuracy. This measure revealed a strong effect of T/D ratio (p< .0001), with performance adversely affected by higher proportion of distractors. There was no effect of stimulus number. This suggests that T/D ratio should be considered in cancellation test design and interpretation. 相似文献
85.
86.
George F. Parker M.D. 《Behavioral sciences & the law》2015,33(2-3):308-322
Indiana statute allows police to seize firearms without a warrant if the officer believes a person meets the law's definition of “dangerous.” Review of the use of this law in Marion County (Indianapolis), Indiana, showed that prosecutors filed petitions in court to retain weapons seized by police under this law 404 times between 2006 and 2013. Police removed weapons from people due to identification of a risk of suicide (68%) or violence (21%), or the presence of psychosis (16%). The firearm seizures occurred in the context of domestic disputes in 28% of cases and intoxication was noted in 26% of cases. There were significant demographic differences in the circumstances of firearm seizures and the firearms seized. The seized firearms were retained by the court at the initial hearing in 63% of cases; this retention was closely linked to the defendant's failure to appear at the hearing. The court dismissed 29% of cases at the initial hearing, closely linked to the defendant's presence at the hearing. In subsequent hearings of cases not dismissed, the court ordered the destruction of the firearms in 72% of cases, all when the individual did not appear in court, and dismissed 24% of the cases, all when the individual was present at the hearing. Overall, the Indiana law removed weapons from a small number of people, most of whom did not seek return of their weapons. The firearm seizure law thus functioned as a months-long cooling-off period for those who did seek the return of their guns. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
87.
88.
89.
90.
Three experiments examined the relationships among plan complexity, access to planned actions, and verbal fluency while pursuing a persuasion goal. Consistent with theoretical expectations, complex planners were less fluent than less complex planners under high access conditions. Persons whose access was raised were less fluent than those whose access was not raised. A second experiment showed that reduced fluency was not induced by lowering of self-confidence. The third experiment replicated the findings of the second experiment and demonstrated that the questioning procedure used to raise access in the first two experiments produced increases in plan complexity as suggested by theory. These findings are discussed in terms of their implications for the study of strategic communication. 相似文献