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   87042篇
  免费   3617篇
  国内免费   33篇
  2020年   975篇
  2019年   1137篇
  2018年   1588篇
  2017年   1627篇
  2016年   1719篇
  2015年   1261篇
  2014年   1483篇
  2013年   7004篇
  2012年   2818篇
  2011年   2801篇
  2010年   1724篇
  2009年   1702篇
  2008年   2440篇
  2007年   2396篇
  2006年   2144篇
  2005年   1887篇
  2004年   1892篇
  2003年   1772篇
  2002年   1741篇
  2001年   2789篇
  2000年   2630篇
  1999年   1990篇
  1998年   939篇
  1997年   816篇
  1996年   875篇
  1994年   804篇
  1992年   1740篇
  1991年   1621篇
  1990年   1630篇
  1989年   1507篇
  1988年   1477篇
  1987年   1364篇
  1986年   1415篇
  1985年   1530篇
  1984年   1193篇
  1983年   1089篇
  1979年   1299篇
  1978年   902篇
  1977年   803篇
  1976年   815篇
  1975年   1073篇
  1974年   1235篇
  1973年   1285篇
  1972年   1117篇
  1971年   1027篇
  1970年   959篇
  1969年   951篇
  1968年   1238篇
  1967年   1103篇
  1966年   1006篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
Previous work on children's intuitive knowledge about the natural world has documented their difficulty in acquiring an overarching concept of biological life that includes plants as well as humans and non‐human animals. It has also suggested that the acquisition of fundamental biological concepts like alive and die may be influenced by the language used to describe them, as evidenced by differences between English‐ and Indonesian‐speaking children's performance in tasks involving these concepts. Here, we examine one particularly important source of linguistic information available to children during this acquisition process: everyday conversations with their parents. We take a cross‐linguistic approach in analysing the evidence available to English‐ and Indonesian‐speaking children as they acquire meanings for words corresponding to the concepts alive and die . Our analysis illustrates that young children acquiring English and Indonesian are faced with distinct problems, but that parental input in both languages does little to support the acquisition of broad, inclusive biological concepts.  相似文献   
83.
This paper examines college students' attributions about suicide as a function of gender and context (athletic vs. relationship failure). Results indicated that male athletes who suicided were considered more emotionally well-adjusted compared to males who suicided because of a relationship failure and all females. Male and female athletes who suicided were seen as more competent and less distressed compared to those who suffered a failed relationship. Females were also seen as more distressed compared to males. These results are discussed in terms of a positive bias toward athletes in our society as well as gender stereotypes. Implications of these findings as well as methodological limitations are discussed.  相似文献   
84.
85.
86.
Logical connectives, such as “AND”, “OR”, “IF . . . THEN”, and “IF AND ONLY IF” are ubiquitous in both language and cognition; however, reasoning with logical connectives is error-prone. We argue that some of these errors may stem from people's tendency to minimize the number of possibilities compatible with logical connectives and to construct a “minimalist” one-possibility representation. As a result, connectives denoting a single possibility (e.g., conjunctions) are likely to be represented correctly, whereas connectives denoting multiple possibilities (e.g., disjunctions or conditionals) are likely to be erroneously represented as conjunctions. These predictions were tested and confirmed in three experiments using different paradigms. In Experiment 1, participants were presented with a multiple-choice task and asked to select all and only those possibilities that would indicate that compound verbal propositions were true versus false. In Experiment 2, a somewhat similar task was used, except that participants were asked later to perform a cued recall of verbal propositions. Finally, Experiment 3 used an old/new recognition paradigm to examine participants' ability to accurately recognize different logical connectives. The results of the three experiments are discussed in relation to theories of representation of possibilities and theories of reasoning.  相似文献   
87.
88.
89.
90.
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