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   34203篇
  免费   1392篇
  国内免费   8篇
  2020年   333篇
  2019年   460篇
  2018年   596篇
  2017年   622篇
  2016年   620篇
  2015年   435篇
  2014年   564篇
  2013年   2560篇
  2012年   1047篇
  2011年   1093篇
  2010年   652篇
  2009年   655篇
  2008年   971篇
  2007年   960篇
  2006年   898篇
  2005年   808篇
  2004年   787篇
  2003年   713篇
  2002年   737篇
  2001年   1044篇
  2000年   952篇
  1999年   741篇
  1998年   409篇
  1997年   334篇
  1996年   324篇
  1992年   562篇
  1991年   559篇
  1990年   548篇
  1989年   554篇
  1988年   544篇
  1987年   508篇
  1986年   539篇
  1985年   583篇
  1984年   466篇
  1983年   443篇
  1982年   365篇
  1981年   351篇
  1979年   535篇
  1978年   388篇
  1976年   362篇
  1975年   438篇
  1974年   496篇
  1973年   514篇
  1972年   409篇
  1971年   382篇
  1970年   378篇
  1969年   409篇
  1968年   489篇
  1967年   422篇
  1966年   424篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
164.
165.
166.
167.
MMPI profiles of 22 chronic arthritic patients were compared to 22 control pain (nonorganic) patients. While elevations were noted in the HS, D, and Hy scales for the rheumatoid patients, the over-all profiles differed from controls on the PA scale.  相似文献   
168.
For 3 consecutive days cockroaches (Periplaneta americana) were exposed to either escapable, inescapable, or no shock in an escape task. Twenty-four hours later they were tested in a shuttlebox escape task. There were reliable differences between escapable and inescapable animals and between inescapable and control animals in both escape latencies and the number of failures to escape.  相似文献   
169.
Previously we (Bruno & Cutting, 1988) explored the perception of spatial relations among objects laid out in a computer-generated environment. In his commentary on our article, Massaro (1988) raised several issues. The most important is from his reanalysis, which indicated that--because of a subadditive trend in the results--additive and multiplicative strategies fit our data in Experiment 1 about equally well. In reply, we performed a different analysis. Results corroborate subadditivity--and hence multiplicative information combination--in Experiment 1 but provide no evidence for it in Experiments 2 and 3. On the whole, then, the results still support additivity more strongly than any other combination rule and thus support our notion of minimodularity.  相似文献   
170.
Fragile X speech phonology in Finnish   总被引:1,自引:0,他引:1  
Fragile X syndrome is a recently discovered relatively common syndrome linked with an anomaly of the X chromosome and causing handicaps of cognitive development especially in males. In the present phonological analysis we will discuss the sound patterns of two Finnish fragile X speakers, a five (borderline intelligence)- and an eight (mildly mentally retarded)-year-old boy. The fragile X syndrome is not necessarily linked with any anomalies of speech organs. The subjects could produce all Finnish speech sounds in isolated test words. However, in the present samples of connected speech they exhibited general dysphonology. What is noteworthy is that their phonological error patterns resembled each other to a great extent. Among the common features were the tendencies to substitute and omit phonemes. As for vowels, our results showed about one-half of the errors to be omissions. Labiality and quantity oppositions were quite resistant to substitution. Most substitution errors of place of consonants occurred in dentals. As for the feature of manner, /r/ and /s/ were the phonemes most prone for substitution. A tendency toward spirantization or /h/ sation was common for both patients. The number of additions was clearly lower than has been reported for English-speaking developmentally dyspraxic children and also for Finnish Broca's aphasics. The speech problems of our patients seemed to indicate higher level motor encoding problems of linguistic information rather than peripheral articulatory deficits.  相似文献   
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